/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+sep-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:44:23,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:44:23,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:44:24,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:44:24,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:44:24,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:44:24,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:44:24,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:44:24,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:44:24,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:44:24,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:44:24,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:44:24,051 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:44:24,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:44:24,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:44:24,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:44:24,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:44:24,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:44:24,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:44:24,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:44:24,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:44:24,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:44:24,085 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:44:24,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:44:24,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:44:24,098 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:44:24,098 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:44:24,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:44:24,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:44:24,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:44:24,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:44:24,104 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:44:24,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:44:24,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:44:24,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:44:24,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:44:24,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:44:24,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:44:24,110 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:44:24,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:44:24,113 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:44:24,121 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 13:44:24,169 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:44:24,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:44:24,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:44:24,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:44:24,174 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:44:24,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:44:24,174 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:44:24,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:44:24,175 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:44:24,175 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:44:24,176 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:44:24,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:44:24,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:44:24,176 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:44:24,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:44:24,177 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:44:24,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:44:24,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:44:24,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:44:24,177 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:44:24,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:44:24,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:44:24,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:44:24,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:44:24,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:44:24,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:44:24,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:44:24,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:44:24,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:44:24,179 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:44:24,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:44:24,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:44:24,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:44:24,670 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:44:24,670 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:44:24,671 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-29 13:44:24,756 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4203a40be/534513a0b1f94fe186bf326a9d37fb8f/FLAGacaa2d954 [2020-10-29 13:44:25,783 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:44:25,784 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-29 13:44:25,823 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4203a40be/534513a0b1f94fe186bf326a9d37fb8f/FLAGacaa2d954 [2020-10-29 13:44:26,286 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4203a40be/534513a0b1f94fe186bf326a9d37fb8f [2020-10-29 13:44:26,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:44:26,299 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:44:26,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:44:26,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:44:26,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:44:26,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:44:26" (1/1) ... [2020-10-29 13:44:26,313 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57cc95ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:26, skipping insertion in model container [2020-10-29 13:44:26,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:44:26" (1/1) ... [2020-10-29 13:44:26,322 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:44:26,508 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:44:27,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:44:27,975 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:44:28,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:44:28,609 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:44:28,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:28 WrapperNode [2020-10-29 13:44:28,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:44:28,612 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:44:28,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:44:28,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:44:28,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:28" (1/1) ... [2020-10-29 13:44:28,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:28" (1/1) ... [2020-10-29 13:44:28,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:28" (1/1) ... [2020-10-29 13:44:28,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:28" (1/1) ... [2020-10-29 13:44:28,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:28" (1/1) ... [2020-10-29 13:44:28,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:28" (1/1) ... [2020-10-29 13:44:28,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:28" (1/1) ... [2020-10-29 13:44:28,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:44:28,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:44:28,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:44:28,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:44:28,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:28" (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 13:44:29,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:44:29,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:44:29,050 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:44:29,050 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:44:29,051 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:44:29,052 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:44:29,052 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:44:29,052 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:44:29,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:44:29,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:44:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:44:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:44:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:44:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:44:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:44:29,055 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:44:29,055 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:44:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:44:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:44:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:44:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:44:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:44:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:44:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:44:29,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:44:29,057 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:44:29,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:44:29,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:44:34,980 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:44:34,981 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:44:34,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:44:34 BoogieIcfgContainer [2020-10-29 13:44:34,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:44:34,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:44:34,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:44:34,992 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:44:34,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:44:26" (1/3) ... [2020-10-29 13:44:34,993 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93591f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:44:34, skipping insertion in model container [2020-10-29 13:44:34,993 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:44:28" (2/3) ... [2020-10-29 13:44:34,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@93591f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:44:34, skipping insertion in model container [2020-10-29 13:44:34,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:44:34" (3/3) ... [2020-10-29 13:44:34,995 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+sep-reducer.c [2020-10-29 13:44:35,007 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:44:35,014 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:44:35,027 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:44:35,067 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:44:35,068 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:44:35,068 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:44:35,068 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:44:35,068 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:44:35,068 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:44:35,068 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:44:35,068 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:44:35,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states. [2020-10-29 13:44:35,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-29 13:44:35,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:44:35,148 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 13:44:35,148 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:44:35,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:44:35,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1580064396, now seen corresponding path program 1 times [2020-10-29 13:44:35,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:44:35,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196516381] [2020-10-29 13:44:35,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:44:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:35,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:36,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:36,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:37,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:37,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:38,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:38,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:39,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:39,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:40,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:40,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-29 13:44:40,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:44:40,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-29 13:44:40,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:40,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:40,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:44:40,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:44:40,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-29 13:44:40,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:44:44,071 WARN L193 SmtUtils]: Spent 3.03 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-29 13:44:44,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:44:44,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:44:44,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:44:44,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:44:44,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:44:44,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:44:44,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-29 13:44:44,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:44:44,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:44:44,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:44:44,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:44:44,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:44:44,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:44:44,290 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 13:44:44,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196516381] [2020-10-29 13:44:44,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:44:44,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:44:44,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885827564] [2020-10-29 13:44:44,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:44:44,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:44:44,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:44:44,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:44:44,316 INFO L87 Difference]: Start difference. First operand 2055 states. Second operand 6 states. [2020-10-29 13:44:47,517 WARN L193 SmtUtils]: Spent 3.04 s on a formula simplification that was a NOOP. DAG size: 688 [2020-10-29 13:45:10,423 WARN L193 SmtUtils]: Spent 2.89 s on a formula simplification that was a NOOP. DAG size: 687 [2020-10-29 13:45:11,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:11,069 INFO L93 Difference]: Finished difference Result 3324 states and 5771 transitions. [2020-10-29 13:45:11,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:45:11,075 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-29 13:45:11,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:11,120 INFO L225 Difference]: With dead ends: 3324 [2020-10-29 13:45:11,121 INFO L226 Difference]: Without dead ends: 2139 [2020-10-29 13:45:11,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:45:11,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2139 states. [2020-10-29 13:45:11,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2139 to 2125. [2020-10-29 13:45:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2125 states. [2020-10-29 13:45:11,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2125 states to 2125 states and 2767 transitions. [2020-10-29 13:45:11,322 INFO L78 Accepts]: Start accepts. Automaton has 2125 states and 2767 transitions. Word has length 70 [2020-10-29 13:45:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:11,323 INFO L481 AbstractCegarLoop]: Abstraction has 2125 states and 2767 transitions. [2020-10-29 13:45:11,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:45:11,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2125 states and 2767 transitions. [2020-10-29 13:45:11,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 13:45:11,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:11,331 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 13:45:11,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:45:11,332 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:11,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:11,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1727466358, now seen corresponding path program 1 times [2020-10-29 13:45:11,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:11,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335954599] [2020-10-29 13:45:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:11,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:11,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:11,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:11,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:13,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:13,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:14,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:15,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:16,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:16,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:16,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 13:45:16,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 13:45:16,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-29 13:45:16,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:16,431 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:16,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:45:16,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 13:45:16,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-29 13:45:16,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:45:19,482 WARN L193 SmtUtils]: Spent 2.89 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-29 13:45:19,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:19,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:19,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:19,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:19,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:19,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-29 13:45:19,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:19,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:19,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:45:19,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:19,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 13:45:19,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:19,699 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 13:45:19,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335954599] [2020-10-29 13:45:19,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:19,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:45:19,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773321369] [2020-10-29 13:45:19,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:45:19,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:19,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:45:19,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:45:19,704 INFO L87 Difference]: Start difference. First operand 2125 states and 2767 transitions. Second operand 6 states. [2020-10-29 13:45:22,832 WARN L193 SmtUtils]: Spent 2.98 s on a formula simplification that was a NOOP. DAG size: 690 [2020-10-29 13:45:38,526 WARN L193 SmtUtils]: Spent 2.93 s on a formula simplification that was a NOOP. DAG size: 688 [2020-10-29 13:45:40,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:45:40,629 INFO L93 Difference]: Finished difference Result 4130 states and 5387 transitions. [2020-10-29 13:45:40,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 13:45:40,629 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-29 13:45:40,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:45:40,646 INFO L225 Difference]: With dead ends: 4130 [2020-10-29 13:45:40,646 INFO L226 Difference]: Without dead ends: 2829 [2020-10-29 13:45:40,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-29 13:45:40,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2829 states. [2020-10-29 13:45:40,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2829 to 2814. [2020-10-29 13:45:40,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2814 states. [2020-10-29 13:45:40,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2814 states to 2814 states and 3597 transitions. [2020-10-29 13:45:40,790 INFO L78 Accepts]: Start accepts. Automaton has 2814 states and 3597 transitions. Word has length 71 [2020-10-29 13:45:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:45:40,790 INFO L481 AbstractCegarLoop]: Abstraction has 2814 states and 3597 transitions. [2020-10-29 13:45:40,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:45:40,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2814 states and 3597 transitions. [2020-10-29 13:45:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:45:40,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:45:40,797 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 13:45:40,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:45:40,798 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:45:40,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:45:40,799 INFO L82 PathProgramCache]: Analyzing trace with hash -790270772, now seen corresponding path program 1 times [2020-10-29 13:45:40,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:45:40,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053892741] [2020-10-29 13:45:40,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:45:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:40,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:41,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:41,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:41,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:42,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:42,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:42,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:42,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:45,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:45,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:45:45,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:45:45,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-29 13:45:45,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:45,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:45,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:45:45,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:45:45,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-29 13:45:45,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:49,101 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-29 13:45:49,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:45:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:45:49,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:45:49,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:45:49,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:45:49,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:45:49,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-29 13:45:49,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:45:49,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:45:49,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:45:49,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:45:49,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:45:49,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:45:49,220 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 13:45:49,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053892741] [2020-10-29 13:45:49,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:45:49,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:45:49,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487043623] [2020-10-29 13:45:49,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:45:49,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:45:49,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:45:49,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:45:49,223 INFO L87 Difference]: Start difference. First operand 2814 states and 3597 transitions. Second operand 9 states. [2020-10-29 13:45:52,458 WARN L193 SmtUtils]: Spent 3.09 s on a formula simplification that was a NOOP. DAG size: 688 [2020-10-29 13:46:11,369 WARN L193 SmtUtils]: Spent 3.07 s on a formula simplification that was a NOOP. DAG size: 690 [2020-10-29 13:46:15,408 WARN L193 SmtUtils]: Spent 2.86 s on a formula simplification that was a NOOP. DAG size: 684 [2020-10-29 13:46:22,429 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification that was a NOOP. DAG size: 689 [2020-10-29 13:46:25,688 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification that was a NOOP. DAG size: 683 [2020-10-29 13:46:26,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:46:26,238 INFO L93 Difference]: Finished difference Result 14640 states and 20611 transitions. [2020-10-29 13:46:26,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-29 13:46:26,238 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:46:26,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:46:26,308 INFO L225 Difference]: With dead ends: 14640 [2020-10-29 13:46:26,309 INFO L226 Difference]: Without dead ends: 14111 [2020-10-29 13:46:26,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=282, Invalid=1200, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 13:46:26,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14111 states. [2020-10-29 13:46:26,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14111 to 2838. [2020-10-29 13:46:26,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2838 states. [2020-10-29 13:46:26,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2838 states to 2838 states and 3598 transitions. [2020-10-29 13:46:26,645 INFO L78 Accepts]: Start accepts. Automaton has 2838 states and 3598 transitions. Word has length 72 [2020-10-29 13:46:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:46:26,649 INFO L481 AbstractCegarLoop]: Abstraction has 2838 states and 3598 transitions. [2020-10-29 13:46:26,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:46:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 2838 states and 3598 transitions. [2020-10-29 13:46:26,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:46:26,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:46:26,656 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 13:46:26,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:46:26,657 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:46:26,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:46:26,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2042208546, now seen corresponding path program 1 times [2020-10-29 13:46:26,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:46:26,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936280785] [2020-10-29 13:46:26,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:46:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:26,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:26,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:26,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:27,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:27,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:28,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:30,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:30,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:31,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:31,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:46:31,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:46:31,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 13:46:31,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:31,750 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 13:46:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 13:46:31,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 13:46:31,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:34,716 WARN L193 SmtUtils]: Spent 2.83 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-29 13:46:34,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:46:34,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:46:34,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:46:34,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:46:34,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:46:34,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:46:34,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 13:46:34,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:46:34,763 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:46:34,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:46:34,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:46:34,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:46:34,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:46:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:46:34,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936280785] [2020-10-29 13:46:34,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:46:34,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 13:46:34,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708226943] [2020-10-29 13:46:34,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 13:46:34,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:46:34,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 13:46:34,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 13:46:34,806 INFO L87 Difference]: Start difference. First operand 2838 states and 3598 transitions. Second operand 6 states. [2020-10-29 13:46:37,916 WARN L193 SmtUtils]: Spent 2.99 s on a formula simplification that was a NOOP. DAG size: 683 [2020-10-29 13:46:55,706 WARN L193 SmtUtils]: Spent 2.97 s on a formula simplification that was a NOOP. DAG size: 684 [2020-10-29 13:46:59,567 WARN L193 SmtUtils]: Spent 2.77 s on a formula simplification that was a NOOP. DAG size: 683 [2020-10-29 13:47:02,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:47:02,779 INFO L93 Difference]: Finished difference Result 8452 states and 11271 transitions. [2020-10-29 13:47:02,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 13:47:02,780 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-29 13:47:02,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:47:02,811 INFO L225 Difference]: With dead ends: 8452 [2020-10-29 13:47:02,812 INFO L226 Difference]: Without dead ends: 8023 [2020-10-29 13:47:02,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-29 13:47:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8023 states. [2020-10-29 13:47:03,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8023 to 6594. [2020-10-29 13:47:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6594 states. [2020-10-29 13:47:03,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6594 states to 6594 states and 8537 transitions. [2020-10-29 13:47:03,404 INFO L78 Accepts]: Start accepts. Automaton has 6594 states and 8537 transitions. Word has length 72 [2020-10-29 13:47:03,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:03,404 INFO L481 AbstractCegarLoop]: Abstraction has 6594 states and 8537 transitions. [2020-10-29 13:47:03,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 13:47:03,404 INFO L276 IsEmpty]: Start isEmpty. Operand 6594 states and 8537 transitions. [2020-10-29 13:47:03,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-29 13:47:03,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:03,417 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 13:47:03,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:47:03,417 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:03,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:03,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1333751677, now seen corresponding path program 1 times [2020-10-29 13:47:03,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:03,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934180279] [2020-10-29 13:47:03,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:03,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:03,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:04,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:08,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:08,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:08,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:08,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-29 13:47:08,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 13:47:08,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-29 13:47:08,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:08,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:08,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-29 13:47:08,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:47:08,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-29 13:47:08,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:11,563 WARN L193 SmtUtils]: Spent 2.75 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-29 13:47:11,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:47:11,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:11,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:11,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:11,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:47:11,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:47:11,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-29 13:47:11,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:11,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:11,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:47:11,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:47:11,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:47:11,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:47:11,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934180279] [2020-10-29 13:47:11,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:47:11,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-29 13:47:11,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723848095] [2020-10-29 13:47:11,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-29 13:47:11,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:47:11,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-29 13:47:11,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-29 13:47:11,669 INFO L87 Difference]: Start difference. First operand 6594 states and 8537 transitions. Second operand 9 states. [2020-10-29 13:47:14,643 WARN L193 SmtUtils]: Spent 2.85 s on a formula simplification that was a NOOP. DAG size: 689 [2020-10-29 13:47:30,546 WARN L193 SmtUtils]: Spent 2.87 s on a formula simplification that was a NOOP. DAG size: 691 [2020-10-29 13:47:34,593 WARN L193 SmtUtils]: Spent 3.05 s on a formula simplification that was a NOOP. DAG size: 692 [2020-10-29 13:47:38,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:47:38,228 INFO L93 Difference]: Finished difference Result 23059 states and 31507 transitions. [2020-10-29 13:47:38,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 13:47:38,229 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-29 13:47:38,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:47:38,266 INFO L225 Difference]: With dead ends: 23059 [2020-10-29 13:47:38,267 INFO L226 Difference]: Without dead ends: 17096 [2020-10-29 13:47:38,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-29 13:47:38,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17096 states. [2020-10-29 13:47:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17096 to 10884. [2020-10-29 13:47:39,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10884 states. [2020-10-29 13:47:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10884 states to 10884 states and 14331 transitions. [2020-10-29 13:47:39,334 INFO L78 Accepts]: Start accepts. Automaton has 10884 states and 14331 transitions. Word has length 72 [2020-10-29 13:47:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:47:39,334 INFO L481 AbstractCegarLoop]: Abstraction has 10884 states and 14331 transitions. [2020-10-29 13:47:39,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-29 13:47:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 10884 states and 14331 transitions. [2020-10-29 13:47:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-29 13:47:39,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:47:39,348 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, 1] [2020-10-29 13:47:39,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:47:39,349 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:47:39,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:47:39,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1500653990, now seen corresponding path program 1 times [2020-10-29 13:47:39,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:47:39,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672730646] [2020-10-29 13:47:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:47:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:39,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:39,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:39,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:40,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:41,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:41,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:42,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:43,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:44,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:44,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 13:47:44,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 13:47:44,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 13:47:44,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:44,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 13:47:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:47:44,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-29 13:47:44,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:47,490 WARN L193 SmtUtils]: Spent 2.91 s on a formula simplification that was a NOOP. DAG size: 682 [2020-10-29 13:47:47,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:47:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:47:47,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:47:47,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:47:47,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:47:47,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:47:47,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 13:47:47,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:47:47,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:47:47,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:47:47,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:47:47,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:47:47,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:47:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:47:47,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672730646] [2020-10-29 13:47:47,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:47:47,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-29 13:47:47,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631320441] [2020-10-29 13:47:47,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-29 13:47:47,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:47:47,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-29 13:47:47,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-29 13:47:47,591 INFO L87 Difference]: Start difference. First operand 10884 states and 14331 transitions. Second operand 8 states. [2020-10-29 13:47:50,815 WARN L193 SmtUtils]: Spent 3.08 s on a formula simplification that was a NOOP. DAG size: 694