/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=DEEPEST --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/eca-rers2012/Problem05_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:13:35,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:13:35,934 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:13:35,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:13:35,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:13:35,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:13:36,000 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:13:36,005 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:13:36,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:13:36,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:13:36,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:13:36,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:13:36,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:13:36,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:13:36,025 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:13:36,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:13:36,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:13:36,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:13:36,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:13:36,047 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:13:36,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:13:36,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:13:36,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:13:36,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:13:36,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:13:36,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:13:36,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:13:36,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:13:36,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:13:36,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:13:36,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:13:36,083 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:13:36,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:13:36,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:13:36,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:13:36,088 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:13:36,089 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:13:36,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:13:36,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:13:36,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:13:36,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:13:36,100 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 [2020-10-27 16:13:36,156 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:13:36,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:13:36,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:13:36,161 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:13:36,161 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:13:36,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:13:36,162 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:13:36,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:13:36,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:13:36,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:13:36,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:13:36,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:13:36,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:13:36,164 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:13:36,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:13:36,165 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:13:36,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:13:36,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:13:36,165 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:13:36,165 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:13:36,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:13:36,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:13:36,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:13:36,166 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:13:36,166 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:13:36,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:13:36,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:13:36,167 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:13:36,167 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:13:36,167 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:13:36,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:13:36,689 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:13:36,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:13:36,694 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:13:36,695 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:13:36,696 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label25.c [2020-10-27 16:13:36,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4dc466ebf/38524f44cb38439cb89dd84409e76633/FLAGbd7b47df3 [2020-10-27 16:13:37,995 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:13:37,996 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label25.c [2020-10-27 16:13:38,043 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4dc466ebf/38524f44cb38439cb89dd84409e76633/FLAGbd7b47df3 [2020-10-27 16:13:38,232 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4dc466ebf/38524f44cb38439cb89dd84409e76633 [2020-10-27 16:13:38,237 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:13:38,245 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:13:38,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:13:38,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:13:38,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:13:38,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:13:38" (1/1) ... [2020-10-27 16:13:38,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@137875e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:38, skipping insertion in model container [2020-10-27 16:13:38,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:13:38" (1/1) ... [2020-10-27 16:13:38,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:13:38,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:13:41,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:13:41,225 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:13:42,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:13:42,642 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:13:42,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:42 WrapperNode [2020-10-27 16:13:42,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:13:42,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:13:42,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:13:42,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:13:42,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:42" (1/1) ... [2020-10-27 16:13:42,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:42" (1/1) ... [2020-10-27 16:13:42,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:42" (1/1) ... [2020-10-27 16:13:42,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:42" (1/1) ... [2020-10-27 16:13:42,990 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:42" (1/1) ... [2020-10-27 16:13:43,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:42" (1/1) ... [2020-10-27 16:13:43,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:42" (1/1) ... [2020-10-27 16:13:43,342 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:13:43,344 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:13:43,344 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:13:43,344 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:13:43,345 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:42" (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 [2020-10-27 16:13:43,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:13:43,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:13:43,484 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:13:43,484 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:13:43,485 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:13:43,485 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:13:43,485 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:13:43,485 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 16:13:43,485 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 16:13:43,485 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output7 [2020-10-27 16:13:43,486 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output8 [2020-10-27 16:13:43,486 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:13:43,487 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:13:43,487 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:13:43,487 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:13:43,488 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:13:43,488 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 16:13:43,489 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 16:13:43,489 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output7 [2020-10-27 16:13:43,489 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output8 [2020-10-27 16:13:43,489 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:13:43,489 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:13:43,489 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:13:43,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:13:43,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:13:43,490 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:13:43,490 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:13:43,490 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:13:43,490 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:13:43,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:13:43,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:13:43,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:13:43,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:13:53,387 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:13:53,387 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:13:53,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:13:53 BoogieIcfgContainer [2020-10-27 16:13:53,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:13:53,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:13:53,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:13:53,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:13:53,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:13:38" (1/3) ... [2020-10-27 16:13:53,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2d52f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:13:53, skipping insertion in model container [2020-10-27 16:13:53,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:13:42" (2/3) ... [2020-10-27 16:13:53,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f2d52f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:13:53, skipping insertion in model container [2020-10-27 16:13:53,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:13:53" (3/3) ... [2020-10-27 16:13:53,402 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label25.c [2020-10-27 16:13:53,414 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:13:53,420 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:13:53,433 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:13:53,470 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:13:53,470 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:13:53,471 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:13:53,471 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:13:53,471 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:13:53,471 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:13:53,471 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:13:53,471 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:13:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states. [2020-10-27 16:13:53,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1685 [2020-10-27 16:13:53,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:13:53,658 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:13:53,659 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:13:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:13:53,666 INFO L82 PathProgramCache]: Analyzing trace with hash -878205481, now seen corresponding path program 1 times [2020-10-27 16:13:53,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:13:53,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093618417] [2020-10-27 16:13:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:13:55,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:13:55,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:14:00,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:14:00,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1708 [2020-10-27 16:14:00,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:14:00,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5346 [2020-10-27 16:14:00,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:14:00,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 16:14:00,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:14:00,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1699 [2020-10-27 16:14:00,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 16:14:02,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:14:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:14:02,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:14:02,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:14:02,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:14:02,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:14:02,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 16:14:02,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:14:02,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:14:02,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:14:02,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:14:02,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 16:14:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:14:05,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093618417] [2020-10-27 16:14:05,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:14:05,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 16:14:05,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995890100] [2020-10-27 16:14:05,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 16:14:05,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:14:05,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 16:14:05,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 16:14:05,705 INFO L87 Difference]: Start difference. First operand 2226 states. Second operand 4 states. [2020-10-27 16:14:29,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:14:29,136 INFO L93 Difference]: Finished difference Result 6315 states and 11856 transitions. [2020-10-27 16:14:29,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:14:29,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1684 [2020-10-27 16:14:29,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:14:29,206 INFO L225 Difference]: With dead ends: 6315 [2020-10-27 16:14:29,206 INFO L226 Difference]: Without dead ends: 4025 [2020-10-27 16:14:29,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:14:29,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4025 states. [2020-10-27 16:14:29,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4025 to 3998. [2020-10-27 16:14:29,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3998 states. [2020-10-27 16:14:29,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3998 states to 3998 states and 6428 transitions. [2020-10-27 16:14:29,457 INFO L78 Accepts]: Start accepts. Automaton has 3998 states and 6428 transitions. Word has length 1684 [2020-10-27 16:14:29,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:14:29,462 INFO L481 AbstractCegarLoop]: Abstraction has 3998 states and 6428 transitions. [2020-10-27 16:14:29,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 16:14:29,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3998 states and 6428 transitions. [2020-10-27 16:14:29,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1694 [2020-10-27 16:14:29,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:14:29,548 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:14:29,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:14:29,548 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:14:29,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:14:29,550 INFO L82 PathProgramCache]: Analyzing trace with hash -574388781, now seen corresponding path program 1 times [2020-10-27 16:14:29,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:14:29,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610194803] [2020-10-27 16:14:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:14:29,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:14:29,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:14:31,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:14:34,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:14:34,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1719 [2020-10-27 16:14:34,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:14:34,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-27 16:14:34,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:14:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 16:14:34,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-27 16:14:34,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1696 [2020-10-27 16:14:34,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 16:14:37,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:14:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:14:37,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:14:37,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:14:37,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:14:37,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:14:37,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 16:14:37,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:14:37,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:14:37,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:14:37,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:14:37,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 16:14:37,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:14:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:14:37,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:14:37,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:14:37,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 16:14:37,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:14:37,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 16:14:37,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:14:37,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:14:37,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:14:37,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 16:14:37,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:14:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:14:39,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610194803] [2020-10-27 16:14:39,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:14:39,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:14:39,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818151788] [2020-10-27 16:14:39,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:14:39,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:14:39,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:14:39,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:14:39,830 INFO L87 Difference]: Start difference. First operand 3998 states and 6428 transitions. Second operand 5 states. [2020-10-27 16:15:05,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:15:05,468 INFO L93 Difference]: Finished difference Result 9820 states and 16386 transitions. [2020-10-27 16:15:05,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:15:05,469 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1693 [2020-10-27 16:15:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:15:05,503 INFO L225 Difference]: With dead ends: 9820 [2020-10-27 16:15:05,504 INFO L226 Difference]: Without dead ends: 5828 [2020-10-27 16:15:05,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:15:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5828 states. [2020-10-27 16:15:05,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5828 to 5818. [2020-10-27 16:15:05,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5818 states. [2020-10-27 16:15:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5818 states to 5818 states and 8832 transitions. [2020-10-27 16:15:05,681 INFO L78 Accepts]: Start accepts. Automaton has 5818 states and 8832 transitions. Word has length 1693 [2020-10-27 16:15:05,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:15:05,685 INFO L481 AbstractCegarLoop]: Abstraction has 5818 states and 8832 transitions. [2020-10-27 16:15:05,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:15:05,685 INFO L276 IsEmpty]: Start isEmpty. Operand 5818 states and 8832 transitions. [2020-10-27 16:15:05,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1709 [2020-10-27 16:15:05,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:15:05,837 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:15:05,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:15:05,838 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:15:05,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:15:05,839 INFO L82 PathProgramCache]: Analyzing trace with hash -165535484, now seen corresponding path program 1 times [2020-10-27 16:15:05,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:15:05,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941309474] [2020-10-27 16:15:05,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:15:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:15:06,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:15:06,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:15:06,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:15:11,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:15:11,040 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1736 [2020-10-27 16:15:11,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:15:11,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-27 16:15:11,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:15:11,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 16:15:11,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 16:15:11,041 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1294 [2020-10-27 16:15:11,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:15:17,484 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-27 16:15:17,668 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-27 16:15:17,801 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-27 16:15:17,950 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-27 16:15:18,104 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-27 16:15:18,273 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-27 16:15:18,437 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-27 16:15:18,798 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-10-27 16:15:19,010 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-27 16:15:19,223 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-27 16:15:19,523 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 40 [2020-10-27 16:15:19,737 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2020-10-27 16:15:19,949 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-27 16:15:20,179 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 38 [2020-10-27 16:15:20,444 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 36 [2020-10-27 16:15:20,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:15:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:15:20,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:15:20,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:15:20,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:15:20,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:15:20,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 16:15:20,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:15:20,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:15:20,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:15:20,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:15:20,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:15:20,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:15:20,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:15:20,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:15:20,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:15:20,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-27 16:15:20,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:15:20,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 16:15:20,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:15:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:15:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:15:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:15:20,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:15:20,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-27 16:15:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:15:20,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:15:20,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:15:20,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 16:15:20,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:15:20,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 16:15:20,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:15:20,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:15:20,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:15:20,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 16:15:20,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:15:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 16:15:48,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941309474] [2020-10-27 16:15:48,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:15:48,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 16:15:48,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359636221] [2020-10-27 16:15:48,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 16:15:48,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:15:48,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 16:15:48,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-27 16:15:48,436 INFO L87 Difference]: Start difference. First operand 5818 states and 8832 transitions. Second operand 23 states. [2020-10-27 16:15:49,606 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2020-10-27 16:15:49,925 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-27 16:15:51,932 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-27 16:16:03,964 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 16:16:04,266 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-27 16:16:18,358 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 16:16:18,676 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-27 16:16:26,124 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 16:16:26,580 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 16:16:33,641 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-27 16:16:33,938 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2020-10-27 16:16:49,057 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2020-10-27 16:16:49,353 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-27 16:16:53,461 WARN L193 SmtUtils]: Spent 443.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 106 [2020-10-27 16:16:57,595 WARN L193 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2020-10-27 16:17:06,214 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-27 16:17:06,540 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-27 16:17:09,475 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 100