/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=SHALLOWEST --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/Problem06_label25.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:32:21,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:32:21,955 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:32:21,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:32:21,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:32:21,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:32:21,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:32:22,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:32:22,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:32:22,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:32:22,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:32:22,007 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:32:22,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:32:22,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:32:22,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:32:22,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:32:22,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:32:22,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:32:22,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:32:22,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:32:22,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:32:22,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:32:22,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:32:22,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:32:22,035 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:32:22,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:32:22,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:32:22,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:32:22,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:32:22,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:32:22,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:32:22,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:32:22,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:32:22,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:32:22,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:32:22,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:32:22,061 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:32:22,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:32:22,064 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:32:22,065 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:32:22,066 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:32:22,069 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 [2020-10-26 21:32:22,130 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:32:22,130 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:32:22,134 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:32:22,134 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:32:22,135 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:32:22,135 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:32:22,135 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:32:22,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:32:22,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:32:22,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:32:22,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:32:22,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:32:22,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:32:22,139 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:32:22,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:32:22,139 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:32:22,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:32:22,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:32:22,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:32:22,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:32:22,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:32:22,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:32:22,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:32:22,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:32:22,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:32:22,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:32:22,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:32:22,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:32:22,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:32:22,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:32:22,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:32:22,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:32:22,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:32:22,649 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:32:22,650 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:32:22,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label25.c [2020-10-26 21:32:22,742 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f3a0c7ff/f1d1a2724bfa4e1a97677e2a26bf17bb/FLAG5507c613b [2020-10-26 21:32:24,117 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:32:24,117 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label25.c [2020-10-26 21:32:24,193 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f3a0c7ff/f1d1a2724bfa4e1a97677e2a26bf17bb/FLAG5507c613b [2020-10-26 21:32:24,316 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f3a0c7ff/f1d1a2724bfa4e1a97677e2a26bf17bb [2020-10-26 21:32:24,321 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:32:24,330 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:32:24,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:32:24,332 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:32:24,336 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:32:24,337 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:32:24" (1/1) ... [2020-10-26 21:32:24,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f995c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:24, skipping insertion in model container [2020-10-26 21:32:24,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:32:24" (1/1) ... [2020-10-26 21:32:24,351 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:32:24,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:32:26,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:32:26,612 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:32:27,682 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:32:27,746 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:32:27,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:27 WrapperNode [2020-10-26 21:32:27,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:32:27,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:32:27,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:32:27,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:32:27,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:27" (1/1) ... [2020-10-26 21:32:27,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:27" (1/1) ... [2020-10-26 21:32:27,933 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:27" (1/1) ... [2020-10-26 21:32:27,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:27" (1/1) ... [2020-10-26 21:32:28,117 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:27" (1/1) ... [2020-10-26 21:32:28,163 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:27" (1/1) ... [2020-10-26 21:32:28,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:27" (1/1) ... [2020-10-26 21:32:28,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:32:28,262 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:32:28,262 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:32:28,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:32:28,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:27" (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 [2020-10-26 21:32:28,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:32:28,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:32:28,461 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:32:28,461 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:32:28,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:32:28,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:32:28,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:32:28,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:32:28,462 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:32:28,463 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:32:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:32:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:32:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:32:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:32:28,464 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:32:28,465 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:32:28,465 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:32:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:32:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:32:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:32:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:32:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:32:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:32:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:32:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:32:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:32:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:32:36,561 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:32:36,562 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:32:36,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:32:36 BoogieIcfgContainer [2020-10-26 21:32:36,567 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:32:36,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:32:36,569 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:32:36,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:32:36,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:32:24" (1/3) ... [2020-10-26 21:32:36,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58310110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:32:36, skipping insertion in model container [2020-10-26 21:32:36,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:27" (2/3) ... [2020-10-26 21:32:36,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58310110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:32:36, skipping insertion in model container [2020-10-26 21:32:36,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:32:36" (3/3) ... [2020-10-26 21:32:36,577 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label25.c [2020-10-26 21:32:36,590 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:32:36,597 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:32:36,612 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:32:36,650 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:32:36,651 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:32:36,651 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:32:36,651 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:32:36,651 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:32:36,651 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:32:36,651 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:32:36,652 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:32:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:32:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1001 [2020-10-26 21:32:36,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:32:36,798 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:32:36,798 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:32:36,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:32:36,814 INFO L82 PathProgramCache]: Analyzing trace with hash -965328152, now seen corresponding path program 1 times [2020-10-26 21:32:36,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:32:36,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555272948] [2020-10-26 21:32:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:32:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:38,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:41,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:43,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:43,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1018 [2020-10-26 21:32:43,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:32:43,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5128 [2020-10-26 21:32:43,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:43,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 21:32:43,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:32:43,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-26 21:32:43,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 21:32:48,087 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-26 21:32:48,319 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-26 21:32:48,573 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-26 21:32:48,816 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-26 21:32:49,020 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-26 21:32:49,247 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-26 21:32:49,460 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-26 21:32:49,645 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 62 [2020-10-26 21:32:49,804 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-26 21:32:50,157 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 73 [2020-10-26 21:32:50,476 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 71 [2020-10-26 21:32:50,771 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 61 [2020-10-26 21:32:51,333 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:32:51,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:32:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:51,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:51,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:51,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:32:51,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:32:51,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-26 21:32:51,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:51,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:32:51,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:32:51,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:32:51,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:33:04,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555272948] [2020-10-26 21:33:04,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:33:04,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 21:33:04,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912128191] [2020-10-26 21:33:04,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:33:04,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:33:04,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:33:04,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:33:04,660 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-26 21:33:05,208 WARN L193 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 21:33:06,245 WARN L193 SmtUtils]: Spent 932.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 21:33:07,283 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 196 [2020-10-26 21:33:08,387 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 213 DAG size of output: 204 [2020-10-26 21:33:13,581 WARN L193 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 224 DAG size of output: 203 [2020-10-26 21:33:17,889 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 229 DAG size of output: 202 [2020-10-26 21:33:21,091 WARN L193 SmtUtils]: Spent 967.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 193 [2020-10-26 21:33:22,234 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 216 DAG size of output: 199 [2020-10-26 21:33:23,698 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 214 DAG size of output: 198 [2020-10-26 21:33:35,123 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 228 DAG size of output: 194 [2020-10-26 21:33:36,432 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 237 DAG size of output: 201 [2020-10-26 21:33:40,186 WARN L193 SmtUtils]: Spent 1.14 s on a formula simplification. DAG size of input: 237 DAG size of output: 197 [2020-10-26 21:33:49,050 WARN L193 SmtUtils]: Spent 936.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 189 [2020-10-26 21:33:50,211 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 212 DAG size of output: 193 [2020-10-26 21:33:53,384 WARN L193 SmtUtils]: Spent 996.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 191 [2020-10-26 21:34:07,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:34:07,524 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-26 21:34:07,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 21:34:07,526 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1000 [2020-10-26 21:34:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:34:07,577 INFO L225 Difference]: With dead ends: 3401 [2020-10-26 21:34:07,577 INFO L226 Difference]: Without dead ends: 2020 [2020-10-26 21:34:07,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=154, Invalid=902, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:34:07,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-26 21:34:07,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-26 21:34:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-26 21:34:07,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-26 21:34:07,804 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 1000 [2020-10-26 21:34:07,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:34:07,808 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-26 21:34:07,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:34:07,809 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-26 21:34:07,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1071 [2020-10-26 21:34:07,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:34:07,931 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:34:07,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:34:07,939 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:34:07,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:34:07,940 INFO L82 PathProgramCache]: Analyzing trace with hash -139454031, now seen corresponding path program 1 times [2020-10-26 21:34:07,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:34:07,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421825087] [2020-10-26 21:34:07,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:34:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:08,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:10,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:13,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:13,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1090 [2020-10-26 21:34:13,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:34:13,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5123 [2020-10-26 21:34:13,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:13,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 21:34:13,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:34:13,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1081 [2020-10-26 21:34:13,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:14,288 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:34:14,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:34:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:14,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:14,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:14,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:34:14,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:14,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 21:34:14,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:14,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:34:14,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:34:14,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:34:14,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:14,549 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:34:14,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:34:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:14,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:14,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:14,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:14,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 21:34:14,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:34:14,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-26 21:34:14,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:14,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:34:14,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:34:14,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 21:34:14,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 63 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 21:34:16,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421825087] [2020-10-26 21:34:16,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:34:16,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 21:34:16,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695714796] [2020-10-26 21:34:16,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 21:34:16,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:34:16,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 21:34:16,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 21:34:16,449 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 6 states. [2020-10-26 21:34:16,742 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:34:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:34:35,338 INFO L93 Difference]: Finished difference Result 4417 states and 7423 transitions. [2020-10-26 21:34:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 21:34:35,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 1070 [2020-10-26 21:34:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:34:35,361 INFO L225 Difference]: With dead ends: 4417 [2020-10-26 21:34:35,361 INFO L226 Difference]: Without dead ends: 3157 [2020-10-26 21:34:35,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:34:35,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3157 states. [2020-10-26 21:34:35,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3157 to 3128. [2020-10-26 21:34:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3128 states. [2020-10-26 21:34:35,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 4748 transitions. [2020-10-26 21:34:35,469 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 4748 transitions. Word has length 1070 [2020-10-26 21:34:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:34:35,472 INFO L481 AbstractCegarLoop]: Abstraction has 3128 states and 4748 transitions. [2020-10-26 21:34:35,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 21:34:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 4748 transitions. [2020-10-26 21:34:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1079 [2020-10-26 21:34:35,490 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:34:35,491 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:34:35,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:34:35,491 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:34:35,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:34:35,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1031433778, now seen corresponding path program 1 times [2020-10-26 21:34:35,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:34:35,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310959514] [2020-10-26 21:34:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:34:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:35,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:35,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:40,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:40,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1100 [2020-10-26 21:34:40,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:34:40,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 21:34:40,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:40,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:34:40,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:34:40,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:34:40,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:41,214 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:34:41,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:34:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:41,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:41,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:41,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:34:41,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:41,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-26 21:34:41,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:41,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:34:41,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:34:41,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:34:41,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:41,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:34:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:41,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:41,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:41,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 21:34:41,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:41,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-26 21:34:41,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:41,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:34:41,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:34:41,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 21:34:41,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:41,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-26 21:34:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:41,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:41,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:41,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 21:34:41,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:41,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 21:34:41,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:41,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:34:41,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 21:34:41,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:34:41,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 72 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 21:34:42,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310959514] [2020-10-26 21:34:42,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:34:42,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:34:42,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678964066] [2020-10-26 21:34:42,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:34:42,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:34:42,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:34:42,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:34:42,874 INFO L87 Difference]: Start difference. First operand 3128 states and 4748 transitions. Second operand 7 states. [2020-10-26 21:34:43,172 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-26 21:34:44,523 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-26 21:35:07,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:35:07,670 INFO L93 Difference]: Finished difference Result 7794 states and 12718 transitions. [2020-10-26 21:35:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:35:07,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1078 [2020-10-26 21:35:07,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:35:07,704 INFO L225 Difference]: With dead ends: 7794 [2020-10-26 21:35:07,704 INFO L226 Difference]: Without dead ends: 5426 [2020-10-26 21:35:07,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:35:07,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2020-10-26 21:35:07,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 5295. [2020-10-26 21:35:07,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5295 states. [2020-10-26 21:35:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5295 states to 5295 states and 7363 transitions. [2020-10-26 21:35:07,897 INFO L78 Accepts]: Start accepts. Automaton has 5295 states and 7363 transitions. Word has length 1078 [2020-10-26 21:35:07,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:35:07,898 INFO L481 AbstractCegarLoop]: Abstraction has 5295 states and 7363 transitions. [2020-10-26 21:35:07,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:35:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 5295 states and 7363 transitions. [2020-10-26 21:35:07,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1131 [2020-10-26 21:35:07,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:35:07,923 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:35:07,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:35:07,924 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:35:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:35:07,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1689144373, now seen corresponding path program 1 times [2020-10-26 21:35:07,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:35:07,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699217406] [2020-10-26 21:35:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:35:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:08,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:08,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:12,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:13,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:13,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1152 [2020-10-26 21:35:13,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:35:13,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5205 [2020-10-26 21:35:13,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:13,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:35:13,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:35:13,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-26 21:35:13,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:13,865 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:35:13,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:35:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:13,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:13,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:13,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:35:13,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:35:13,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 21:35:13,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:13,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:35:13,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:35:13,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:35:13,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:14,027 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:35:14,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:35:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:14,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:14,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:14,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:14,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:35:14,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:35:14,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 577 [2020-10-26 21:35:14,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:14,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:35:14,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:35:14,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:35:14,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:14,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-26 21:35:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:14,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:14,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:14,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 21:35:14,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:35:14,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 21:35:14,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:14,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:35:14,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:35:14,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 21:35:14,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 126 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 21:35:15,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699217406] [2020-10-26 21:35:15,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:35:15,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:35:15,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937767711] [2020-10-26 21:35:15,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 21:35:15,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:35:15,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 21:35:15,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 21:35:15,958 INFO L87 Difference]: Start difference. First operand 5295 states and 7363 transitions. Second operand 8 states. [2020-10-26 21:35:16,250 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:35:17,899 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-26 21:35:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:35:39,418 INFO L93 Difference]: Finished difference Result 14745 states and 21421 transitions. [2020-10-26 21:35:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:35:39,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 1130 [2020-10-26 21:35:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:35:39,469 INFO L225 Difference]: With dead ends: 14745 [2020-10-26 21:35:39,469 INFO L226 Difference]: Without dead ends: 10210 [2020-10-26 21:35:39,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-26 21:35:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10210 states. [2020-10-26 21:35:39,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10210 to 9813. [2020-10-26 21:35:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9813 states. [2020-10-26 21:35:39,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9813 states to 9813 states and 13259 transitions. [2020-10-26 21:35:39,797 INFO L78 Accepts]: Start accepts. Automaton has 9813 states and 13259 transitions. Word has length 1130 [2020-10-26 21:35:39,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:35:39,798 INFO L481 AbstractCegarLoop]: Abstraction has 9813 states and 13259 transitions. [2020-10-26 21:35:39,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 21:35:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 9813 states and 13259 transitions. [2020-10-26 21:35:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1143 [2020-10-26 21:35:39,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:35:39,838 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:35:39,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 21:35:39,838 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:35:39,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:35:39,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1639608814, now seen corresponding path program 1 times [2020-10-26 21:35:39,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:35:39,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656873855] [2020-10-26 21:35:39,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:35:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:40,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:40,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:40,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:45,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:45,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1166 [2020-10-26 21:35:45,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 21:35:45,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5047 [2020-10-26 21:35:45,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:45,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 21:35:45,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:35:45,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 21:35:45,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:45,736 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:35:45,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:35:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:45,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:45,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:45,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:35:45,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:35:45,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-26 21:35:45,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:45,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:35:45,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:35:45,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:35:45,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:45,917 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-26 21:35:45,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:35:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:46,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:46,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:46,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:46,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:35:46,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:35:46,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 428 [2020-10-26 21:35:46,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:35:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:35:46,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:35:46,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:46,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-10-26 21:35:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:46,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:46,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:46,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-26 21:35:46,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:35:46,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 21:35:46,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:46,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:35:46,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:35:46,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 21:35:46,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:46,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-10-26 21:35:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:46,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:46,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:46,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 21:35:46,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:35:46,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 21:35:46,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:46,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 21:35:46,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 21:35:46,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 21:35:46,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:35:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 138 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 21:35:47,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656873855] [2020-10-26 21:35:47,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:35:47,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 21:35:47,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39400790] [2020-10-26 21:35:47,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:35:47,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:35:47,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:35:47,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:35:47,372 INFO L87 Difference]: Start difference. First operand 9813 states and 13259 transitions. Second operand 7 states. [2020-10-26 21:35:47,681 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-26 21:35:49,527 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 160