/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:42:25,188 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:42:25,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:42:25,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:42:25,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:42:25,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:42:25,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:42:25,230 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:42:25,232 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:42:25,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:42:25,235 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:42:25,236 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:42:25,236 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:42:25,238 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:42:25,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:42:25,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:42:25,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:42:25,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:42:25,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:42:25,246 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:42:25,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:42:25,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:42:25,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:42:25,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:42:25,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:42:25,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:42:25,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:42:25,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:42:25,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:42:25,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:42:25,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:42:25,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:42:25,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:42:25,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:42:25,273 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:42:25,273 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:42:25,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:42:25,274 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:42:25,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:42:25,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:42:25,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:42:25,278 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 13:42:25,325 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:42:25,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:42:25,329 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:42:25,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:42:25,330 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:42:25,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:42:25,330 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:42:25,330 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:42:25,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:42:25,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:42:25,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:42:25,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:42:25,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:42:25,333 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:42:25,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:42:25,333 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:42:25,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:42:25,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:42:25,334 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:42:25,334 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:42:25,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:42:25,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:42:25,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:42:25,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:42:25,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:42:25,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:42:25,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:42:25,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:42:25,336 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:42:25,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:42:25,680 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:42:25,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:42:25,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:42:25,709 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:42:25,710 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:42:25,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:42:25,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a5f50cd1/6553addd12764382a249a4d2390cc935/FLAGa3a271cff [2020-10-29 13:42:26,679 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:42:26,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:42:26,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a5f50cd1/6553addd12764382a249a4d2390cc935/FLAGa3a271cff [2020-10-29 13:42:26,757 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a5f50cd1/6553addd12764382a249a4d2390cc935 [2020-10-29 13:42:26,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:42:26,778 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:42:26,780 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:42:26,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:42:26,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:42:26,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:42:26" (1/1) ... [2020-10-29 13:42:26,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f7ffae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:26, skipping insertion in model container [2020-10-29 13:42:26,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:42:26" (1/1) ... [2020-10-29 13:42:26,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:42:26,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:42:28,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:42:28,251 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:42:28,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:42:28,900 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:42:28,902 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:28 WrapperNode [2020-10-29 13:42:28,902 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:42:28,903 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:42:28,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:42:28,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:42:28,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:28" (1/1) ... [2020-10-29 13:42:28,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:28" (1/1) ... [2020-10-29 13:42:28,973 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:28" (1/1) ... [2020-10-29 13:42:28,974 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:28" (1/1) ... [2020-10-29 13:42:29,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:28" (1/1) ... [2020-10-29 13:42:29,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:28" (1/1) ... [2020-10-29 13:42:29,147 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:28" (1/1) ... [2020-10-29 13:42:29,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:42:29,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:42:29,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:42:29,258 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:42:29,259 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:28" (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 13:42:29,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:42:29,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:42:29,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:42:29,351 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:42:29,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:42:29,352 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:42:29,352 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:42:29,353 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:42:29,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:42:29,353 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:42:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:42:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:42:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:42:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:42:29,355 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:42:29,355 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:42:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:42:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:42:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:42:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:42:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:42:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:42:29,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:42:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:42:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:42:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:42:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:42:29,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:42:33,093 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:42:33,094 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:42:33,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:42:33 BoogieIcfgContainer [2020-10-29 13:42:33,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:42:33,100 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:42:33,100 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:42:33,104 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:42:33,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:42:26" (1/3) ... [2020-10-29 13:42:33,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64efefc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:42:33, skipping insertion in model container [2020-10-29 13:42:33,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:42:28" (2/3) ... [2020-10-29 13:42:33,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64efefc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:42:33, skipping insertion in model container [2020-10-29 13:42:33,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:42:33" (3/3) ... [2020-10-29 13:42:33,107 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.1.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:42:33,120 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:42:33,126 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:42:33,139 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:42:33,174 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:42:33,174 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:42:33,174 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:42:33,174 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:42:33,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:42:33,175 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:42:33,175 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:42:33,175 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:42:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states. [2020-10-29 13:42:33,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:42:33,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:33,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:33,290 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:33,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1940053764, now seen corresponding path program 1 times [2020-10-29 13:42:33,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:33,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [246988561] [2020-10-29 13:42:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:34,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:34,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:34,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:34,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:35,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:35,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:38,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:38,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:42:38,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:42:38,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-29 13:42:38,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:38,898 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:38,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:42:38,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:42:38,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:42:38,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 13:42:41,072 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-29 13:42:41,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:42:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:41,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:41,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:42:41,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:42:41,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:42:41,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-29 13:42:41,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:42:41,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:42:41,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:42:41,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:42:41,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:42:41,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:42:41,326 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 13:42:41,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [246988561] [2020-10-29 13:42:41,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:42:41,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:42:41,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996375002] [2020-10-29 13:42:41,336 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:42:41,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:42:41,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:42:41,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:42:41,361 INFO L87 Difference]: Start difference. First operand 1115 states. Second operand 6 states. [2020-10-29 13:42:43,444 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-29 13:42:55,161 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-29 13:42:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:42:56,186 INFO L93 Difference]: Finished difference Result 1634 states and 2949 transitions. [2020-10-29 13:42:56,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:42:56,189 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-29 13:42:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:42:56,218 INFO L225 Difference]: With dead ends: 1634 [2020-10-29 13:42:56,219 INFO L226 Difference]: Without dead ends: 1115 [2020-10-29 13:42:56,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:42:56,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2020-10-29 13:42:56,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 1109. [2020-10-29 13:42:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2020-10-29 13:42:56,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1405 transitions. [2020-10-29 13:42:56,374 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1405 transitions. Word has length 69 [2020-10-29 13:42:56,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:42:56,376 INFO L481 AbstractCegarLoop]: Abstraction has 1109 states and 1405 transitions. [2020-10-29 13:42:56,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:42:56,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1405 transitions. [2020-10-29 13:42:56,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:42:56,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:42:56,385 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:42:56,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:42:56,386 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:42:56,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:42:56,388 INFO L82 PathProgramCache]: Analyzing trace with hash -462731809, now seen corresponding path program 1 times [2020-10-29 13:42:56,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:42:56,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962709716] [2020-10-29 13:42:56,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:42:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:42:56,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:56,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:56,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:56,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:58,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:58,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:59,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:42:59,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:01,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:01,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:43:01,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:43:01,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-29 13:43:01,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:01,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:01,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:43:01,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:43:01,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 13:43:01,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:03,623 WARN L193 SmtUtils]: Spent 1.92 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-29 13:43:03,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:03,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:03,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:03,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:03,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:03,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-29 13:43:03,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:03,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:03,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:03,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:03,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:03,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:03,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:03,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962709716] [2020-10-29 13:43:03,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:03,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:43:03,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972711227] [2020-10-29 13:43:03,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:43:03,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:03,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:43:03,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:43:03,723 INFO L87 Difference]: Start difference. First operand 1109 states and 1405 transitions. Second operand 6 states. [2020-10-29 13:43:05,568 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 647 [2020-10-29 13:43:14,045 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 648 [2020-10-29 13:43:15,995 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 647 [2020-10-29 13:43:18,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:18,995 INFO L93 Difference]: Finished difference Result 3459 states and 4772 transitions. [2020-10-29 13:43:18,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:43:18,996 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-29 13:43:18,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:19,011 INFO L225 Difference]: With dead ends: 3459 [2020-10-29 13:43:19,012 INFO L226 Difference]: Without dead ends: 2624 [2020-10-29 13:43:19,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:43:19,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2624 states. [2020-10-29 13:43:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2624 to 1866. [2020-10-29 13:43:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1866 states. [2020-10-29 13:43:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1866 states to 1866 states and 2528 transitions. [2020-10-29 13:43:19,126 INFO L78 Accepts]: Start accepts. Automaton has 1866 states and 2528 transitions. Word has length 69 [2020-10-29 13:43:19,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:19,127 INFO L481 AbstractCegarLoop]: Abstraction has 1866 states and 2528 transitions. [2020-10-29 13:43:19,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:43:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1866 states and 2528 transitions. [2020-10-29 13:43:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:43:19,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:19,132 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:19,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:43:19,132 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:19,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:19,133 INFO L82 PathProgramCache]: Analyzing trace with hash -721698554, now seen corresponding path program 1 times [2020-10-29 13:43:19,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:19,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706208120] [2020-10-29 13:43:19,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:19,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:19,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:19,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:19,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:19,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:20,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:20,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:20,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:22,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:22,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:24,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:24,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:43:24,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 13:43:24,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 13:43:24,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:24,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:24,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:43:24,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 13:43:24,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-29 13:43:24,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:26,168 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-29 13:43:26,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:26,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:26,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:26,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:26,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:26,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-29 13:43:26,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:26,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:26,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:43:26,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:26,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:43:26,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:26,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706208120] [2020-10-29 13:43:26,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:26,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:43:26,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463110406] [2020-10-29 13:43:26,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:43:26,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:26,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:43:26,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:43:26,273 INFO L87 Difference]: Start difference. First operand 1866 states and 2528 transitions. Second operand 6 states. [2020-10-29 13:43:28,245 WARN L193 SmtUtils]: Spent 1.88 s on a formula simplification that was a NOOP. DAG size: 647 [2020-10-29 13:43:36,383 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 648 [2020-10-29 13:43:38,391 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 647 [2020-10-29 13:43:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:43:41,045 INFO L93 Difference]: Finished difference Result 9107 states and 13175 transitions. [2020-10-29 13:43:41,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:43:41,045 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 69 [2020-10-29 13:43:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:43:41,086 INFO L225 Difference]: With dead ends: 9107 [2020-10-29 13:43:41,087 INFO L226 Difference]: Without dead ends: 7523 [2020-10-29 13:43:41,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:43:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7523 states. [2020-10-29 13:43:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7523 to 4469. [2020-10-29 13:43:41,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4469 states. [2020-10-29 13:43:41,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4469 states to 4469 states and 6370 transitions. [2020-10-29 13:43:41,390 INFO L78 Accepts]: Start accepts. Automaton has 4469 states and 6370 transitions. Word has length 69 [2020-10-29 13:43:41,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:43:41,391 INFO L481 AbstractCegarLoop]: Abstraction has 4469 states and 6370 transitions. [2020-10-29 13:43:41,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:43:41,391 INFO L276 IsEmpty]: Start isEmpty. Operand 4469 states and 6370 transitions. [2020-10-29 13:43:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 13:43:41,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:43:41,397 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:43:41,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:43:41,397 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:43:41,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:43:41,398 INFO L82 PathProgramCache]: Analyzing trace with hash -977019185, now seen corresponding path program 1 times [2020-10-29 13:43:41,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:43:41,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168413671] [2020-10-29 13:43:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:43:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:41,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:41,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:41,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:41,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:42,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:44,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:45,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:45,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:45,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:46,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:46,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-29 13:43:46,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:43:46,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-29 13:43:46,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:46,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:46,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:43:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:43:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-29 13:43:46,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:43:48,480 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-29 13:43:48,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:43:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:43:48,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:43:48,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:43:48,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:43:48,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:43:48,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-29 13:43:48,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:43:48,568 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:43:48,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:43:48,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:43:48,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:43:48,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:43:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:43:48,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168413671] [2020-10-29 13:43:48,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:43:48,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:43:48,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142224258] [2020-10-29 13:43:48,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:43:48,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:43:48,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:43:48,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:43:48,623 INFO L87 Difference]: Start difference. First operand 4469 states and 6370 transitions. Second operand 9 states. [2020-10-29 13:43:50,655 WARN L193 SmtUtils]: Spent 1.93 s on a formula simplification that was a NOOP. DAG size: 651 [2020-10-29 13:43:58,836 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-29 13:44:02,028 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-29 13:44:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:02,378 INFO L93 Difference]: Finished difference Result 18990 states and 28444 transitions. [2020-10-29 13:44:02,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:44:02,378 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-10-29 13:44:02,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:02,459 INFO L225 Difference]: With dead ends: 18990 [2020-10-29 13:44:02,459 INFO L226 Difference]: Without dead ends: 16202 [2020-10-29 13:44:02,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:44:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16202 states. [2020-10-29 13:44:02,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16202 to 4405. [2020-10-29 13:44:02,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4405 states. [2020-10-29 13:44:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4405 states to 4405 states and 6265 transitions. [2020-10-29 13:44:02,881 INFO L78 Accepts]: Start accepts. Automaton has 4405 states and 6265 transitions. Word has length 69 [2020-10-29 13:44:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:02,881 INFO L481 AbstractCegarLoop]: Abstraction has 4405 states and 6265 transitions. [2020-10-29 13:44:02,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:44:02,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4405 states and 6265 transitions. [2020-10-29 13:44:02,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:44:02,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:02,888 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:02,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:44:02,888 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:02,889 INFO L82 PathProgramCache]: Analyzing trace with hash 921100505, now seen corresponding path program 1 times [2020-10-29 13:44:02,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:02,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759659437] [2020-10-29 13:44:02,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:03,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:03,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:03,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:03,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:03,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:05,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:05,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:07,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:07,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:08,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:08,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:44:08,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:44:08,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-29 13:44:08,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:08,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:44:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:08,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-29 13:44:08,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:09,922 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-29 13:44:09,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:09,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:09,989 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:09,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:09,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:09,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-29 13:44:09,990 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:09,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:09,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:09,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:09,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:09,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:10,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:10,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759659437] [2020-10-29 13:44:10,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:10,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:44:10,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895792249] [2020-10-29 13:44:10,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:44:10,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:10,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:44:10,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:44:10,031 INFO L87 Difference]: Start difference. First operand 4405 states and 6265 transitions. Second operand 8 states. [2020-10-29 13:44:11,907 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 650 [2020-10-29 13:44:19,957 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-29 13:44:23,196 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 652 [2020-10-29 13:44:23,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:23,868 INFO L93 Difference]: Finished difference Result 21173 states and 31541 transitions. [2020-10-29 13:44:23,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 13:44:23,869 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-29 13:44:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:23,905 INFO L225 Difference]: With dead ends: 21173 [2020-10-29 13:44:23,905 INFO L226 Difference]: Without dead ends: 17855 [2020-10-29 13:44:23,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-29 13:44:23,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17855 states. [2020-10-29 13:44:24,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17855 to 4161. [2020-10-29 13:44:24,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4161 states. [2020-10-29 13:44:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4161 states to 4161 states and 5889 transitions. [2020-10-29 13:44:24,353 INFO L78 Accepts]: Start accepts. Automaton has 4161 states and 5889 transitions. Word has length 70 [2020-10-29 13:44:24,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:24,354 INFO L481 AbstractCegarLoop]: Abstraction has 4161 states and 5889 transitions. [2020-10-29 13:44:24,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:44:24,354 INFO L276 IsEmpty]: Start isEmpty. Operand 4161 states and 5889 transitions. [2020-10-29 13:44:24,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:44:24,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:24,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:24,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:44:24,359 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:24,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1073045955, now seen corresponding path program 1 times [2020-10-29 13:44:24,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:24,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [416699161] [2020-10-29 13:44:24,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:24,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:24,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:24,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:24,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:25,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:25,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:26,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:29,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:29,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:44:29,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 13:44:29,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:44:29,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:29,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:29,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:44:29,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:29,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 13:44:29,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:31,391 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-29 13:44:31,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:31,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:31,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:31,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:31,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:31,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-29 13:44:31,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:31,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:31,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:31,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:31,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:31,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:31,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:31,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [416699161] [2020-10-29 13:44:31,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:31,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:44:31,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162961426] [2020-10-29 13:44:31,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:44:31,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:31,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:44:31,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:31,522 INFO L87 Difference]: Start difference. First operand 4161 states and 5889 transitions. Second operand 6 states. [2020-10-29 13:44:33,468 WARN L193 SmtUtils]: Spent 1.84 s on a formula simplification that was a NOOP. DAG size: 654 [2020-10-29 13:44:39,744 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 652 [2020-10-29 13:44:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:44:40,661 INFO L93 Difference]: Finished difference Result 6009 states and 8697 transitions. [2020-10-29 13:44:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:44:40,662 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-29 13:44:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:44:40,667 INFO L225 Difference]: With dead ends: 6009 [2020-10-29 13:44:40,667 INFO L226 Difference]: Without dead ends: 2975 [2020-10-29 13:44:40,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:44:40,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2020-10-29 13:44:40,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2969. [2020-10-29 13:44:40,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2969 states. [2020-10-29 13:44:40,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2969 states to 2969 states and 4213 transitions. [2020-10-29 13:44:40,958 INFO L78 Accepts]: Start accepts. Automaton has 2969 states and 4213 transitions. Word has length 70 [2020-10-29 13:44:40,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:44:40,958 INFO L481 AbstractCegarLoop]: Abstraction has 2969 states and 4213 transitions. [2020-10-29 13:44:40,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:44:40,958 INFO L276 IsEmpty]: Start isEmpty. Operand 2969 states and 4213 transitions. [2020-10-29 13:44:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:44:40,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:40,962 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:44:40,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:44:40,962 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:40,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1825789490, now seen corresponding path program 1 times [2020-10-29 13:44:40,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:40,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523094253] [2020-10-29 13:44:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:41,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:41,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:41,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:41,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:41,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:46,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:46,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:44:46,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:44:46,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-29 13:44:46,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:46,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:44:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:44:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:44:46,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:48,101 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-29 13:44:48,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:48,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:48,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:48,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:48,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:48,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-29 13:44:48,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:48,148 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:44:48,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:48,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:44:48,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:48,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:44:48,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523094253] [2020-10-29 13:44:48,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:48,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:44:48,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973938759] [2020-10-29 13:44:48,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:44:48,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:48,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:44:48,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:44:48,196 INFO L87 Difference]: Start difference. First operand 2969 states and 4213 transitions. Second operand 9 states. [2020-10-29 13:44:50,090 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-29 13:44:56,843 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-29 13:44:58,922 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 656 [2020-10-29 13:45:00,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:00,979 INFO L93 Difference]: Finished difference Result 11555 states and 17163 transitions. [2020-10-29 13:45:00,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:45:00,979 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 71 [2020-10-29 13:45:00,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:00,999 INFO L225 Difference]: With dead ends: 11555 [2020-10-29 13:45:00,999 INFO L226 Difference]: Without dead ends: 9613 [2020-10-29 13:45:01,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:45:01,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9613 states. [2020-10-29 13:45:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9613 to 2778. [2020-10-29 13:45:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2778 states. [2020-10-29 13:45:01,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 3949 transitions. [2020-10-29 13:45:01,342 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 3949 transitions. Word has length 71 [2020-10-29 13:45:01,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:01,342 INFO L481 AbstractCegarLoop]: Abstraction has 2778 states and 3949 transitions. [2020-10-29 13:45:01,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:45:01,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 3949 transitions. [2020-10-29 13:45:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:45:01,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:01,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:45:01,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:45:01,345 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:01,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:01,346 INFO L82 PathProgramCache]: Analyzing trace with hash 747309376, now seen corresponding path program 1 times [2020-10-29 13:45:01,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:01,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746203608] [2020-10-29 13:45:01,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:01,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:01,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:01,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:01,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:02,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:03,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:06,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:06,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:45:06,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 13:45:06,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:45:06,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:06,410 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:06,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:45:06,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:45:06,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-29 13:45:06,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:08,412 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-29 13:45:08,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:08,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:08,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:08,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:08,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:08,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-29 13:45:08,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:08,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:08,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:45:08,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:08,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:45:08,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:08,504 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 13:45:08,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746203608] [2020-10-29 13:45:08,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:08,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:45:08,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274842431] [2020-10-29 13:45:08,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:45:08,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:08,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:45:08,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:45:08,506 INFO L87 Difference]: Start difference. First operand 2778 states and 3949 transitions. Second operand 8 states. [2020-10-29 13:45:10,394 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-29 13:45:16,884 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 657 [2020-10-29 13:45:19,974 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-29 13:45:20,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:20,524 INFO L93 Difference]: Finished difference Result 10326 states and 15169 transitions. [2020-10-29 13:45:20,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:45:20,525 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-29 13:45:20,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:20,541 INFO L225 Difference]: With dead ends: 10326 [2020-10-29 13:45:20,541 INFO L226 Difference]: Without dead ends: 8209 [2020-10-29 13:45:20,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:45:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8209 states. [2020-10-29 13:45:20,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8209 to 2766. [2020-10-29 13:45:20,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2766 states. [2020-10-29 13:45:20,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 3913 transitions. [2020-10-29 13:45:20,903 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 3913 transitions. Word has length 71 [2020-10-29 13:45:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:20,903 INFO L481 AbstractCegarLoop]: Abstraction has 2766 states and 3913 transitions. [2020-10-29 13:45:20,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:45:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 3913 transitions. [2020-10-29 13:45:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:45:20,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:20,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:45:20,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:45:20,906 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:20,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:20,907 INFO L82 PathProgramCache]: Analyzing trace with hash -862686468, now seen corresponding path program 1 times [2020-10-29 13:45:20,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:20,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888756384] [2020-10-29 13:45:20,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:20,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:20,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:21,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:21,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:21,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:23,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:25,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:25,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:45:25,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:45:25,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-29 13:45:25,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:25,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:25,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:45:25,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:45:25,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-29 13:45:25,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:27,947 WARN L193 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-29 13:45:27,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:27,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:28,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:28,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:28,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:28,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-29 13:45:28,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:28,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:28,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:45:28,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:28,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:45:28,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:28,047 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 13:45:28,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888756384] [2020-10-29 13:45:28,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:28,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:45:28,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062598231] [2020-10-29 13:45:28,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:45:28,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:28,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:45:28,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:45:28,050 INFO L87 Difference]: Start difference. First operand 2766 states and 3913 transitions. Second operand 8 states. [2020-10-29 13:45:29,936 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-29 13:45:36,437 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification that was a NOOP. DAG size: 657 [2020-10-29 13:45:39,964 WARN L193 SmtUtils]: Spent 1.80 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-29 13:45:40,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:40,879 INFO L93 Difference]: Finished difference Result 11579 states and 16835 transitions. [2020-10-29 13:45:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:45:40,879 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-29 13:45:40,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:40,891 INFO L225 Difference]: With dead ends: 11579 [2020-10-29 13:45:40,891 INFO L226 Difference]: Without dead ends: 9733 [2020-10-29 13:45:40,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:45:40,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9733 states. [2020-10-29 13:45:41,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9733 to 2808. [2020-10-29 13:45:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2808 states. [2020-10-29 13:45:41,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 3927 transitions. [2020-10-29 13:45:41,258 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 3927 transitions. Word has length 72 [2020-10-29 13:45:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:41,259 INFO L481 AbstractCegarLoop]: Abstraction has 2808 states and 3927 transitions. [2020-10-29 13:45:41,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:45:41,259 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 3927 transitions. [2020-10-29 13:45:41,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:45:41,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:41,262 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:45:41,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 13:45:41,262 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:41,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:41,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1036076885, now seen corresponding path program 1 times [2020-10-29 13:45:41,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:41,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578245848] [2020-10-29 13:45:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:41,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:41,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:41,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:41,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:41,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:46,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:46,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:45:46,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:45:46,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 13:45:46,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:46,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:46,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:45:46,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:45:46,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-29 13:45:46,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:48,261 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification that was a NOOP. DAG size: 646 [2020-10-29 13:45:48,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:48,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:48,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:48,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:48,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:48,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-29 13:45:48,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:48,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:48,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:45:48,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:48,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:45:48,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:48,397 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 13:45:48,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578245848] [2020-10-29 13:45:48,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:48,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-29 13:45:48,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173503571] [2020-10-29 13:45:48,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:45:48,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:48,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:45:48,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:45:48,399 INFO L87 Difference]: Start difference. First operand 2808 states and 3927 transitions. Second operand 8 states. [2020-10-29 13:45:50,267 WARN L193 SmtUtils]: Spent 1.79 s on a formula simplification that was a NOOP. DAG size: 653 [2020-10-29 13:45:56,845 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 657 [2020-10-29 13:46:00,529 WARN L193 SmtUtils]: Spent 1.81 s on a formula simplification that was a NOOP. DAG size: 655 [2020-10-29 13:46:01,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:01,664 INFO L93 Difference]: Finished difference Result 13329 states and 19247 transitions. [2020-10-29 13:46:01,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-29 13:46:01,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 72 [2020-10-29 13:46:01,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:01,677 INFO L225 Difference]: With dead ends: 13329 [2020-10-29 13:46:01,678 INFO L226 Difference]: Without dead ends: 11420 [2020-10-29 13:46:01,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-29 13:46:01,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11420 states. [2020-10-29 13:46:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11420 to 2864. [2020-10-29 13:46:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2020-10-29 13:46:02,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4007 transitions. [2020-10-29 13:46:02,035 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4007 transitions. Word has length 72 [2020-10-29 13:46:02,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:02,035 INFO L481 AbstractCegarLoop]: Abstraction has 2864 states and 4007 transitions. [2020-10-29 13:46:02,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-29 13:46:02,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4007 transitions. [2020-10-29 13:46:02,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:46:02,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:02,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:46:02,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 13:46:02,039 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:02,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:02,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1427382203, now seen corresponding path program 1 times [2020-10-29 13:46:02,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:02,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606811048] [2020-10-29 13:46:02,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY