/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/Problem19_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:31:12,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:31:12,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:31:12,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:31:12,292 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:31:12,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:31:12,306 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:31:12,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:31:12,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:31:12,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:31:12,329 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:31:12,332 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:31:12,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:31:12,337 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:31:12,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:31:12,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:31:12,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:31:12,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:31:12,378 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:31:12,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:31:12,389 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:31:12,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:31:12,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:31:12,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:31:12,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:31:12,402 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:31:12,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:31:12,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:31:12,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:31:12,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:31:12,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:31:12,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:31:12,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:31:12,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:31:12,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:31:12,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:31:12,413 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:31:12,414 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:31:12,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:31:12,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:31:12,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:31:12,422 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 19:31:12,454 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:31:12,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:31:12,457 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:31:12,457 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:31:12,457 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:31:12,458 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:31:12,458 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:31:12,458 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:31:12,459 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:31:12,459 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:31:12,459 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:31:12,459 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:31:12,460 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:31:12,460 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:31:12,460 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:31:12,460 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:31:12,461 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:31:12,461 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:31:12,461 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:31:12,461 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:31:12,462 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:31:12,462 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:31:12,462 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:31:12,462 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:31:12,463 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:31:12,463 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:31:12,463 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:31:12,463 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:31:12,463 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:31:12,464 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:31:12,942 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:31:13,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:31:13,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:31:13,026 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:31:13,027 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:31:13,028 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label46.c [2020-10-27 19:31:13,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0db655631/faecb51f4a784c83bf728ccfd464a731/FLAGf3958ef9b [2020-10-27 19:31:14,535 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:31:14,536 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label46.c [2020-10-27 19:31:14,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0db655631/faecb51f4a784c83bf728ccfd464a731/FLAGf3958ef9b [2020-10-27 19:31:14,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0db655631/faecb51f4a784c83bf728ccfd464a731 [2020-10-27 19:31:14,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:31:14,766 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:31:14,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:31:14,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:31:14,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:31:14,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:31:14" (1/1) ... [2020-10-27 19:31:14,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32f66b43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:14, skipping insertion in model container [2020-10-27 19:31:14,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:31:14" (1/1) ... [2020-10-27 19:31:14,786 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:31:14,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:31:17,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:31:17,270 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:31:18,554 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:31:18,611 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:31:18,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:18 WrapperNode [2020-10-27 19:31:18,612 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:31:18,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:31:18,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:31:18,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:31:18,630 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:18" (1/1) ... [2020-10-27 19:31:18,632 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:18" (1/1) ... [2020-10-27 19:31:18,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:18" (1/1) ... [2020-10-27 19:31:18,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:18" (1/1) ... [2020-10-27 19:31:19,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:18" (1/1) ... [2020-10-27 19:31:19,065 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:18" (1/1) ... [2020-10-27 19:31:19,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:18" (1/1) ... [2020-10-27 19:31:19,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:31:19,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:31:19,260 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:31:19,260 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:31:19,261 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:18" (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 19:31:19,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:31:19,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:31:19,345 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:31:19,345 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:31:19,346 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:31:19,346 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:31:19,346 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 19:31:19,346 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 19:31:19,346 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 19:31:19,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:31:19,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:31:19,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:31:19,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:31:19,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 19:31:19,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 19:31:19,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 19:31:19,348 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:31:19,348 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:31:19,348 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:31:19,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:31:19,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:31:19,348 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:31:19,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:31:19,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:31:19,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:31:19,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:31:19,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:31:19,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:31:19,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:31:33,742 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:31:33,743 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:31:33,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:31:33 BoogieIcfgContainer [2020-10-27 19:31:33,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:31:33,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:31:33,754 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:31:33,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:31:33,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:31:14" (1/3) ... [2020-10-27 19:31:33,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2cde86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:31:33, skipping insertion in model container [2020-10-27 19:31:33,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:31:18" (2/3) ... [2020-10-27 19:31:33,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d2cde86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:31:33, skipping insertion in model container [2020-10-27 19:31:33,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:31:33" (3/3) ... [2020-10-27 19:31:33,762 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label46.c [2020-10-27 19:31:33,775 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:31:33,782 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:31:33,796 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:31:33,846 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:31:33,847 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:31:33,847 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:31:33,847 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:31:33,847 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:31:33,847 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:31:33,848 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:31:33,848 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:31:33,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 19:31:33,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:31:33,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:31:33,922 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] [2020-10-27 19:31:33,923 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:31:33,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:31:33,934 INFO L82 PathProgramCache]: Analyzing trace with hash 965166134, now seen corresponding path program 1 times [2020-10-27 19:31:33,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:31:33,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024318725] [2020-10-27 19:31:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:31:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:34,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:34,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:34,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:31:34,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:34,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-27 19:31:34,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:31:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:31:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 19:31:34,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:31:35,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:31:35,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:31:35,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:31:35,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:31:35,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:31:35,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:31:35,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 19:31:35,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:31:35,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:31:35,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:31:35,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:31:35,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:31:35,140 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 19:31:35,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024318725] [2020-10-27 19:31:35,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:31:35,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:31:35,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642915060] [2020-10-27 19:31:35,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:31:35,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:31:35,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:31:35,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:31:35,176 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 19:32:09,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:32:09,941 INFO L93 Difference]: Finished difference Result 5081 states and 9549 transitions. [2020-10-27 19:32:09,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:32:09,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-27 19:32:09,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:32:09,996 INFO L225 Difference]: With dead ends: 5081 [2020-10-27 19:32:09,996 INFO L226 Difference]: Without dead ends: 3220 [2020-10-27 19:32:10,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:32:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2020-10-27 19:32:10,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 3195. [2020-10-27 19:32:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3195 states. [2020-10-27 19:32:10,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 5074 transitions. [2020-10-27 19:32:10,273 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 5074 transitions. Word has length 39 [2020-10-27 19:32:10,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:32:10,275 INFO L481 AbstractCegarLoop]: Abstraction has 3195 states and 5074 transitions. [2020-10-27 19:32:10,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:32:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 5074 transitions. [2020-10-27 19:32:10,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 19:32:10,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:32:10,287 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 19:32:10,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:32:10,288 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:32:10,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:32:10,290 INFO L82 PathProgramCache]: Analyzing trace with hash -741151704, now seen corresponding path program 1 times [2020-10-27 19:32:10,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:32:10,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146213716] [2020-10-27 19:32:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:32:10,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:10,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:10,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:10,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:11,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:12,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:12,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 19:32:12,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:32:12,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1828 [2020-10-27 19:32:12,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:12,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:32:12,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 19:32:12,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:32:12,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:32:12,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:32:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:12,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:12,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:12,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:32:12,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:32:12,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:32:12,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:12,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:32:12,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:32:12,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:32:12,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:32:12,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:32:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:32:12,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:12,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:32:12,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:32:12,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 19:32:12,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:32:12,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-27 19:32:12,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:32:12,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:32:12,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-27 19:32:12,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:32:12,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:32:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:32:12,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146213716] [2020-10-27 19:32:12,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:32:12,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:32:12,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073228495] [2020-10-27 19:32:12,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:32:12,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:32:12,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:32:12,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:32:12,606 INFO L87 Difference]: Start difference. First operand 3195 states and 5074 transitions. Second operand 6 states. [2020-10-27 19:33:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:33:02,280 INFO L93 Difference]: Finished difference Result 12219 states and 19714 transitions. [2020-10-27 19:33:02,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:33:02,290 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 110 [2020-10-27 19:33:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:33:02,358 INFO L225 Difference]: With dead ends: 12219 [2020-10-27 19:33:02,358 INFO L226 Difference]: Without dead ends: 9030 [2020-10-27 19:33:02,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:33:02,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9030 states. [2020-10-27 19:33:02,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9030 to 8935. [2020-10-27 19:33:02,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8935 states. [2020-10-27 19:33:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8935 states to 8935 states and 12779 transitions. [2020-10-27 19:33:02,760 INFO L78 Accepts]: Start accepts. Automaton has 8935 states and 12779 transitions. Word has length 110 [2020-10-27 19:33:02,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:33:02,764 INFO L481 AbstractCegarLoop]: Abstraction has 8935 states and 12779 transitions. [2020-10-27 19:33:02,764 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:33:02,764 INFO L276 IsEmpty]: Start isEmpty. Operand 8935 states and 12779 transitions. [2020-10-27 19:33:02,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 19:33:02,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:33:02,776 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 19:33:02,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:33:02,780 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:33:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:33:02,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1501531318, now seen corresponding path program 1 times [2020-10-27 19:33:02,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:33:02,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65527999] [2020-10-27 19:33:02,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:33:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:02,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:03,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:03,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:33:03,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 19:33:03,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:33:03,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1071 [2020-10-27 19:33:03,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:33:03,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:33:03,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-27 19:33:03,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 19:33:03,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:33:04,140 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:33:04,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:33:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:04,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:04,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:33:04,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:33:04,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:33:04,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 19:33:04,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:33:04,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:33:04,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:33:04,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:33:04,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:33:04,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:33:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:04,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:04,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:33:04,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 19:33:04,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:33:04,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-27 19:33:04,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:33:04,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:33:04,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:33:04,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 19:33:04,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:33:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:33:04,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65527999] [2020-10-27 19:33:04,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:33:04,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:33:04,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293037760] [2020-10-27 19:33:04,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:33:04,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:33:04,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:33:04,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:33:04,396 INFO L87 Difference]: Start difference. First operand 8935 states and 12779 transitions. Second operand 5 states. [2020-10-27 19:33:05,278 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:33:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:33:59,155 INFO L93 Difference]: Finished difference Result 20766 states and 30461 transitions. [2020-10-27 19:33:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:33:59,159 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-27 19:33:59,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:33:59,237 INFO L225 Difference]: With dead ends: 20766 [2020-10-27 19:33:59,237 INFO L226 Difference]: Without dead ends: 11837 [2020-10-27 19:33:59,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:33:59,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11837 states. [2020-10-27 19:33:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11837 to 11777. [2020-10-27 19:33:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11777 states. [2020-10-27 19:33:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11777 states to 11777 states and 16455 transitions. [2020-10-27 19:33:59,631 INFO L78 Accepts]: Start accepts. Automaton has 11777 states and 16455 transitions. Word has length 120 [2020-10-27 19:33:59,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:33:59,632 INFO L481 AbstractCegarLoop]: Abstraction has 11777 states and 16455 transitions. [2020-10-27 19:33:59,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:33:59,632 INFO L276 IsEmpty]: Start isEmpty. Operand 11777 states and 16455 transitions. [2020-10-27 19:33:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 19:33:59,635 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:33:59,636 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 19:33:59,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:33:59,636 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:33:59,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:33:59,637 INFO L82 PathProgramCache]: Analyzing trace with hash -63599264, now seen corresponding path program 1 times [2020-10-27 19:33:59,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:33:59,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [997064585] [2020-10-27 19:33:59,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:33:59,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:33:59,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:33:59,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:00,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:01,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:01,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 19:34:01,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:34:01,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1920 [2020-10-27 19:34:01,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:01,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:34:01,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 111 [2020-10-27 19:34:01,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 19:34:01,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:34:01,876 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:34:01,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:34:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:34:01,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:01,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:01,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:34:01,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:34:01,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 19:34:01,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:01,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:34:01,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:34:01,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:34:01,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:34:01,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:34:01,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:34:02,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:34:02,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:34:02,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 19:34:02,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:34:02,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-10-27 19:34:02,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:34:02,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:34:02,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:34:02,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 19:34:02,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:34:02,203 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:34:02,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [997064585] [2020-10-27 19:34:02,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:34:02,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:34:02,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174325726] [2020-10-27 19:34:02,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:34:02,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:34:02,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:34:02,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:34:02,211 INFO L87 Difference]: Start difference. First operand 11777 states and 16455 transitions. Second operand 5 states. [2020-10-27 19:34:02,871 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 19:35:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:35:09,346 INFO L93 Difference]: Finished difference Result 34818 states and 49620 transitions. [2020-10-27 19:35:09,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:35:09,351 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 140 [2020-10-27 19:35:09,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:35:09,449 INFO L225 Difference]: With dead ends: 34818 [2020-10-27 19:35:09,449 INFO L226 Difference]: Without dead ends: 23047 [2020-10-27 19:35:09,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:35:09,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23047 states. [2020-10-27 19:35:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23047 to 23020. [2020-10-27 19:35:10,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23020 states. [2020-10-27 19:35:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23020 states to 23020 states and 29433 transitions. [2020-10-27 19:35:10,295 INFO L78 Accepts]: Start accepts. Automaton has 23020 states and 29433 transitions. Word has length 140 [2020-10-27 19:35:10,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:35:10,297 INFO L481 AbstractCegarLoop]: Abstraction has 23020 states and 29433 transitions. [2020-10-27 19:35:10,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:35:10,298 INFO L276 IsEmpty]: Start isEmpty. Operand 23020 states and 29433 transitions. [2020-10-27 19:35:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-27 19:35:10,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:35:10,302 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 19:35:10,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:35:10,302 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:35:10,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:35:10,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1612118144, now seen corresponding path program 1 times [2020-10-27 19:35:10,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:35:10,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869355302] [2020-10-27 19:35:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:35:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:35:10,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:10,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:11,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:11,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:35:11,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-27 19:35:11,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:35:11,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1326 [2020-10-27 19:35:11,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:35:11,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:35:11,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-27 19:35:11,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 19:35:11,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:35:11,883 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:35:11,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:35:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:35:11,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:11,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:35:11,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:35:11,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:35:11,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:35:11,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:35:11,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:35:11,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:35:11,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:35:11,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:35:11,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:35:11,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:35:12,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:35:12,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:35:12,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 19:35:12,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:35:12,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 144 [2020-10-27 19:35:12,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:35:12,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:35:12,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:35:12,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 19:35:12,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:35:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:35:12,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869355302] [2020-10-27 19:35:12,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:35:12,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:35:12,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304498117] [2020-10-27 19:35:12,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:35:12,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:35:12,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:35:12,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:35:12,341 INFO L87 Difference]: Start difference. First operand 23020 states and 29433 transitions. Second operand 5 states. [2020-10-27 19:35:12,542 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 66