/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/Problem17_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:19:24,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:19:24,159 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:19:24,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:19:24,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:19:24,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:19:24,230 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:19:24,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:19:24,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:19:24,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:19:24,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:19:24,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:19:24,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:19:24,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:19:24,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:19:24,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:19:24,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:19:24,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:19:24,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:19:24,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:19:24,296 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:19:24,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:19:24,300 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:19:24,303 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:19:24,313 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:19:24,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:19:24,314 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:19:24,316 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:19:24,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:19:24,318 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 00:19:24,327 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:19:24,328 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:19:24,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:19:24,337 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 00:19:24,386 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:19:24,386 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:19:24,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:19:24,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:19:24,391 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:19:24,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:19:24,392 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:19:24,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:19:24,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:19:24,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:19:24,394 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:19:24,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:19:24,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:19:24,394 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:19:24,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:19:24,395 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:19:24,395 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:19:24,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:19:24,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:19:24,396 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:19:24,396 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:19:24,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:19:24,396 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:19:24,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:19:24,397 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:19:24,397 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:19:24,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:19:24,397 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:19:24,398 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:19:24,398 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:19:24,876 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:19:24,932 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:19:24,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:19:24,938 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:19:24,938 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:19:24,940 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label55.c [2020-10-27 00:19:25,026 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/86cb701e8/fa78c6e9fea344fb9d0234084401d8e1/FLAG695632928 [2020-10-27 00:19:26,027 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:19:26,028 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label55.c [2020-10-27 00:19:26,060 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/86cb701e8/fa78c6e9fea344fb9d0234084401d8e1/FLAG695632928 [2020-10-27 00:19:26,570 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/86cb701e8/fa78c6e9fea344fb9d0234084401d8e1 [2020-10-27 00:19:26,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:19:26,580 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:19:26,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:19:26,585 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:19:26,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:19:26,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:19:26" (1/1) ... [2020-10-27 00:19:26,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31a30266 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:26, skipping insertion in model container [2020-10-27 00:19:26,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:19:26" (1/1) ... [2020-10-27 00:19:26,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:19:26,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:19:28,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:19:28,082 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:19:28,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:19:28,719 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:19:28,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:28 WrapperNode [2020-10-27 00:19:28,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:19:28,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:19:28,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:19:28,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:19:28,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:28" (1/1) ... [2020-10-27 00:19:28,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:28" (1/1) ... [2020-10-27 00:19:28,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:28" (1/1) ... [2020-10-27 00:19:28,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:28" (1/1) ... [2020-10-27 00:19:28,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:28" (1/1) ... [2020-10-27 00:19:29,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:28" (1/1) ... [2020-10-27 00:19:29,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:28" (1/1) ... [2020-10-27 00:19:29,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:19:29,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:19:29,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:19:29,088 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:19:29,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:19:29,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:19:29,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:19:29,187 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:19:29,187 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:19:29,187 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:19:29,187 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:19:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:19:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:19:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:19:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:19:29,188 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:19:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:19:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:19:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:19:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:19:29,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:19:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:19:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:19:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:19:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:19:29,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:19:38,821 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:19:38,822 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:19:38,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:19:38 BoogieIcfgContainer [2020-10-27 00:19:38,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:19:38,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:19:38,828 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:19:38,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:19:38,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:19:26" (1/3) ... [2020-10-27 00:19:38,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7790c0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:19:38, skipping insertion in model container [2020-10-27 00:19:38,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:19:28" (2/3) ... [2020-10-27 00:19:38,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7790c0cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:19:38, skipping insertion in model container [2020-10-27 00:19:38,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:19:38" (3/3) ... [2020-10-27 00:19:38,837 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label55.c [2020-10-27 00:19:38,852 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:19:38,859 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:19:38,872 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:19:38,912 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:19:38,912 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:19:38,912 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:19:38,912 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:19:38,913 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:19:38,913 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:19:38,913 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:19:38,913 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:19:38,951 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:19:38,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 00:19:38,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:38,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:38,962 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:38,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1310069814, now seen corresponding path program 1 times [2020-10-27 00:19:38,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:38,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263193509] [2020-10-27 00:19:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:39,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:39,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:39,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:39,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 00:19:39,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:39,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 547 [2020-10-27 00:19:39,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:39,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:19:39,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:19:39,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 00:19:39,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:19:39,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:39,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:39,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:39,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:39,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:39,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 00:19:39,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:39,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:39,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:39,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:19:39,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:39,989 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 00:19:39,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263193509] [2020-10-27 00:19:39,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:19:39,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:19:39,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471434723] [2020-10-27 00:19:40,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:19:40,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:40,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:19:40,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:19:40,023 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:19:54,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:54,727 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 00:19:54,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:19:54,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-27 00:19:54,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:54,756 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 00:19:54,757 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 00:19:54,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 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 00:19:54,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 00:19:54,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 00:19:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 00:19:54,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 00:19:54,901 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 18 [2020-10-27 00:19:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:54,902 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 00:19:54,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:19:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 00:19:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 00:19:54,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:54,910 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 00:19:54,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:19:54,910 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:54,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:54,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1984119178, now seen corresponding path program 1 times [2020-10-27 00:19:54,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:54,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974723659] [2020-10-27 00:19:54,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:55,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:55,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:56,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:56,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 00:19:56,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:19:56,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1219 [2020-10-27 00:19:56,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:56,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:19:56,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:19:56,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:19:56,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:19:56,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:56,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:56,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:56,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:56,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:56,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 00:19:56,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:56,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:19:56,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:56,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:56,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:56,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:56,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:19:56,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:56,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-27 00:19:56,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:56,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:56,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:56,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:19:56,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:19:56,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974723659] [2020-10-27 00:19:56,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:19:56,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:19:56,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965956089] [2020-10-27 00:19:56,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:19:56,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:56,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:19:56,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:19:56,688 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-27 00:20:11,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:11,837 INFO L93 Difference]: Finished difference Result 2466 states and 3913 transitions. [2020-10-27 00:20:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:20:11,839 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 89 [2020-10-27 00:20:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:11,852 INFO L225 Difference]: With dead ends: 2466 [2020-10-27 00:20:11,852 INFO L226 Difference]: Without dead ends: 1480 [2020-10-27 00:20:11,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:20:11,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2020-10-27 00:20:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1442. [2020-10-27 00:20:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2020-10-27 00:20:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1871 transitions. [2020-10-27 00:20:11,960 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1871 transitions. Word has length 89 [2020-10-27 00:20:11,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:11,961 INFO L481 AbstractCegarLoop]: Abstraction has 1442 states and 1871 transitions. [2020-10-27 00:20:11,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:20:11,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1871 transitions. [2020-10-27 00:20:11,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 00:20:11,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:11,969 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 00:20:11,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:20:11,970 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:11,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:11,971 INFO L82 PathProgramCache]: Analyzing trace with hash 222658647, now seen corresponding path program 1 times [2020-10-27 00:20:11,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:11,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470927998] [2020-10-27 00:20:11,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:12,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:12,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:12,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 00:20:12,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:12,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 404 [2020-10-27 00:20:12,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:12,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:12,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 00:20:12,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 00:20:12,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:12,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:12,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:12,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:12,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:12,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:12,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:20:12,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:12,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:20:12,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:12,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:20:12,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:20:12,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:12,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:12,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:12,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:12,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:20:12,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:12,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-27 00:20:12,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:12,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:12,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:12,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 00:20:12,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:20:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:20:12,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470927998] [2020-10-27 00:20:12,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:12,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:20:12,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012002273] [2020-10-27 00:20:12,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:20:12,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:12,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:20:12,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:20:12,927 INFO L87 Difference]: Start difference. First operand 1442 states and 1871 transitions. Second operand 5 states. [2020-10-27 00:20:29,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:29,101 INFO L93 Difference]: Finished difference Result 3350 states and 4601 transitions. [2020-10-27 00:20:29,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:20:29,103 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 92 [2020-10-27 00:20:29,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:29,116 INFO L225 Difference]: With dead ends: 3350 [2020-10-27 00:20:29,116 INFO L226 Difference]: Without dead ends: 1901 [2020-10-27 00:20:29,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:20:29,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2020-10-27 00:20:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1886. [2020-10-27 00:20:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2020-10-27 00:20:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2310 transitions. [2020-10-27 00:20:29,192 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2310 transitions. Word has length 92 [2020-10-27 00:20:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:29,192 INFO L481 AbstractCegarLoop]: Abstraction has 1886 states and 2310 transitions. [2020-10-27 00:20:29,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:20:29,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2310 transitions. [2020-10-27 00:20:29,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-27 00:20:29,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:29,198 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 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 00:20:29,198 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:20:29,199 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:29,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:29,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1153678342, now seen corresponding path program 1 times [2020-10-27 00:20:29,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:29,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015334732] [2020-10-27 00:20:29,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:29,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:29,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:30,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:30,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-27 00:20:30,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:20:30,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1514 [2020-10-27 00:20:30,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:30,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:30,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:20:30,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:20:30,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-27 00:20:30,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:30,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:30,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:30,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:30,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:30,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 00:20:30,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:20:30,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:30,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:20:30,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:31,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:31,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:31,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:31,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:31,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:31,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-10-27 00:20:31,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:31,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:31,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:31,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:20:31,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:31,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:31,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:31,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:31,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:20:31,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:31,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-27 00:20:31,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:31,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:31,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:31,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:20:31,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:20:31,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015334732] [2020-10-27 00:20:31,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:31,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:20:31,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511859614] [2020-10-27 00:20:31,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:20:31,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:31,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:20:31,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:20:31,679 INFO L87 Difference]: Start difference. First operand 1886 states and 2310 transitions. Second operand 7 states. [2020-10-27 00:20:46,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:46,508 INFO L93 Difference]: Finished difference Result 4253 states and 5513 transitions. [2020-10-27 00:20:46,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:20:46,510 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 178 [2020-10-27 00:20:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:46,546 INFO L225 Difference]: With dead ends: 4253 [2020-10-27 00:20:46,547 INFO L226 Difference]: Without dead ends: 2806 [2020-10-27 00:20:46,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:20:46,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2806 states. [2020-10-27 00:20:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2806 to 2795. [2020-10-27 00:20:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2795 states. [2020-10-27 00:20:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2795 states to 2795 states and 3417 transitions. [2020-10-27 00:20:46,667 INFO L78 Accepts]: Start accepts. Automaton has 2795 states and 3417 transitions. Word has length 178 [2020-10-27 00:20:46,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:46,669 INFO L481 AbstractCegarLoop]: Abstraction has 2795 states and 3417 transitions. [2020-10-27 00:20:46,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:20:46,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2795 states and 3417 transitions. [2020-10-27 00:20:46,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-27 00:20:46,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:46,678 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 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 00:20:46,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:20:46,678 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:46,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:46,679 INFO L82 PathProgramCache]: Analyzing trace with hash -931225182, now seen corresponding path program 1 times [2020-10-27 00:20:46,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:46,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216896854] [2020-10-27 00:20:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:46,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:46,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:48,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:50,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:50,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-27 00:20:50,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:20:50,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4187 [2020-10-27 00:20:50,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:50,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:20:50,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:20:50,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 00:20:50,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:51,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:51,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:51,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:51,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:51,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:51,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:20:51,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:51,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:51,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:51,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:20:51,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:51,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:51,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:51,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:51,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:51,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:51,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-27 00:20:51,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:51,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:20:51,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:51,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:20:51,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:51,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:51,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:51,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:51,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:20:51,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:51,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-27 00:20:51,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:51,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:51,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:51,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:20:51,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:52,049 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 24 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:20:52,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216896854] [2020-10-27 00:20:52,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:52,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:20:52,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181688450] [2020-10-27 00:20:52,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:20:52,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:52,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:20:52,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:20:52,052 INFO L87 Difference]: Start difference. First operand 2795 states and 3417 transitions. Second operand 10 states. [2020-10-27 00:20:53,191 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 00:20:56,932 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-27 00:21:24,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:24,771 INFO L93 Difference]: Finished difference Result 8052 states and 10314 transitions. [2020-10-27 00:21:24,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 00:21:24,773 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 180 [2020-10-27 00:21:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:24,808 INFO L225 Difference]: With dead ends: 8052 [2020-10-27 00:21:24,808 INFO L226 Difference]: Without dead ends: 5696 [2020-10-27 00:21:24,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2020-10-27 00:21:24,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5696 states. [2020-10-27 00:21:25,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5696 to 5608. [2020-10-27 00:21:25,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5608 states. [2020-10-27 00:21:25,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5608 states to 5608 states and 6948 transitions. [2020-10-27 00:21:25,033 INFO L78 Accepts]: Start accepts. Automaton has 5608 states and 6948 transitions. Word has length 180 [2020-10-27 00:21:25,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:25,034 INFO L481 AbstractCegarLoop]: Abstraction has 5608 states and 6948 transitions. [2020-10-27 00:21:25,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:21:25,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5608 states and 6948 transitions. [2020-10-27 00:21:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-27 00:21:25,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:25,038 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:25,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:21:25,039 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:25,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:25,039 INFO L82 PathProgramCache]: Analyzing trace with hash 2103892056, now seen corresponding path program 1 times [2020-10-27 00:21:25,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:25,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455371887] [2020-10-27 00:21:25,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:25,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:25,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:26,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:26,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-27 00:21:26,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:21:26,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1491 [2020-10-27 00:21:26,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:26,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:21:26,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:21:26,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 00:21:26,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:26,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:26,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:26,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:26,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:26,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:26,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:21:26,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:26,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:21:26,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:26,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:21:26,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:26,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:26,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:26,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:26,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:21:26,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:26,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-27 00:21:26,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:26,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:26,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:26,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:21:26,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:27,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:21:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:27,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:27,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:27,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:27,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:21:27,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:21:27,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-27 00:21:27,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:27,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:27,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:27,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:21:27,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:27,606 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 97 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:21:27,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455371887] [2020-10-27 00:21:27,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:27,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:21:27,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250097459] [2020-10-27 00:21:27,608 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:21:27,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:27,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:21:27,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:21:27,609 INFO L87 Difference]: Start difference. First operand 5608 states and 6948 transitions. Second operand 6 states. [2020-10-27 00:21:43,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:43,070 INFO L93 Difference]: Finished difference Result 11221 states and 14264 transitions. [2020-10-27 00:21:43,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 00:21:43,072 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 191 [2020-10-27 00:21:43,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:43,101 INFO L225 Difference]: With dead ends: 11221 [2020-10-27 00:21:43,101 INFO L226 Difference]: Without dead ends: 6052 [2020-10-27 00:21:43,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:21:43,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6052 states. [2020-10-27 00:21:43,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6052 to 6041. [2020-10-27 00:21:43,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6041 states. [2020-10-27 00:21:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6041 states to 6041 states and 7561 transitions. [2020-10-27 00:21:43,289 INFO L78 Accepts]: Start accepts. Automaton has 6041 states and 7561 transitions. Word has length 191 [2020-10-27 00:21:43,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:43,290 INFO L481 AbstractCegarLoop]: Abstraction has 6041 states and 7561 transitions. [2020-10-27 00:21:43,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:21:43,290 INFO L276 IsEmpty]: Start isEmpty. Operand 6041 states and 7561 transitions. [2020-10-27 00:21:43,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-27 00:21:43,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:43,296 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:43,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:21:43,296 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:43,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:43,297 INFO L82 PathProgramCache]: Analyzing trace with hash -991863235, now seen corresponding path program 1 times [2020-10-27 00:21:43,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:43,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426019740] [2020-10-27 00:21:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:43,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:44,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:46,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:46,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-27 00:21:46,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:21:46,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3382 [2020-10-27 00:21:46,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:46,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:21:46,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:21:46,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-27 00:21:46,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:46,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:46,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:46,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:46,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:46,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:46,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:21:46,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:46,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:46,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:21:46,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:46,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:46,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:46,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:47,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:47,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:21:47,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:47,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-27 00:21:47,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:47,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:21:47,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:47,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:21:47,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:47,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:21:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:47,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:47,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:47,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 00:21:47,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:47,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-27 00:21:47,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:47,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 00:21:47,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:47,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-27 00:21:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:47,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:47,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:47,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:21:47,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:47,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 00:21:47,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:47,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:21:47,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:21:47,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:21:47,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:21:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 106 proven. 145 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:21:47,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426019740] [2020-10-27 00:21:47,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:47,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:21:47,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241157161] [2020-10-27 00:21:47,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:21:47,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:47,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:21:47,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:21:47,846 INFO L87 Difference]: Start difference. First operand 6041 states and 7561 transitions. Second operand 10 states. [2020-10-27 00:21:48,143 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 66 [2020-10-27 00:21:54,577 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 71 [2020-10-27 00:21:56,129 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 67 [2020-10-27 00:22:12,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:22:12,761 INFO L93 Difference]: Finished difference Result 16391 states and 21201 transitions. [2020-10-27 00:22:12,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 00:22:12,768 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 258 [2020-10-27 00:22:12,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:22:12,810 INFO L225 Difference]: With dead ends: 16391 [2020-10-27 00:22:12,811 INFO L226 Difference]: Without dead ends: 9896 [2020-10-27 00:22:12,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-27 00:22:12,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9896 states. [2020-10-27 00:22:13,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9896 to 9745. [2020-10-27 00:22:13,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9745 states. [2020-10-27 00:22:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9745 states to 9745 states and 11835 transitions. [2020-10-27 00:22:13,091 INFO L78 Accepts]: Start accepts. Automaton has 9745 states and 11835 transitions. Word has length 258 [2020-10-27 00:22:13,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:22:13,092 INFO L481 AbstractCegarLoop]: Abstraction has 9745 states and 11835 transitions. [2020-10-27 00:22:13,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:22:13,092 INFO L276 IsEmpty]: Start isEmpty. Operand 9745 states and 11835 transitions. [2020-10-27 00:22:13,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-27 00:22:13,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:22:13,098 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 00:22:13,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:22:13,098 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:22:13,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:22:13,099 INFO L82 PathProgramCache]: Analyzing trace with hash 192227644, now seen corresponding path program 1 times [2020-10-27 00:22:13,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:22:13,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901281590] [2020-10-27 00:22:13,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:22:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:13,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:13,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:15,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:15,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:17,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:17,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-27 00:22:17,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:22:17,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4256 [2020-10-27 00:22:17,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:17,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:22:17,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:22:17,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 269 [2020-10-27 00:22:17,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:22:17,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:22:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:17,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:17,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:17,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:22:17,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:17,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 00:22:17,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:17,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:22:17,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:17,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:22:17,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:17,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:22:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:17,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:17,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:17,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:22:17,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:17,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-27 00:22:17,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:17,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:22:17,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:17,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:22:17,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:18,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:22:18,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:18,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:18,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:18,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:22:18,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:18,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-27 00:22:18,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:18,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:18,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:18,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:22:18,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:18,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:22:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:18,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:18,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:18,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:22:18,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:18,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-27 00:22:18,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:18,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:18,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:18,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:22:18,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 130 proven. 34 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-27 00:22:18,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901281590] [2020-10-27 00:22:18,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:22:18,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:22:18,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54895436] [2020-10-27 00:22:18,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:22:18,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:22:18,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:22:18,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:22:18,536 INFO L87 Difference]: Start difference. First operand 9745 states and 11835 transitions. Second operand 9 states. [2020-10-27 00:22:39,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:22:39,183 INFO L93 Difference]: Finished difference Result 23291 states and 31132 transitions. [2020-10-27 00:22:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:22:39,187 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 262 [2020-10-27 00:22:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:22:39,262 INFO L225 Difference]: With dead ends: 23291 [2020-10-27 00:22:39,262 INFO L226 Difference]: Without dead ends: 13529 [2020-10-27 00:22:39,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-27 00:22:39,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13529 states. [2020-10-27 00:22:39,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13529 to 13262. [2020-10-27 00:22:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13262 states. [2020-10-27 00:22:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13262 states to 13262 states and 15817 transitions. [2020-10-27 00:22:39,677 INFO L78 Accepts]: Start accepts. Automaton has 13262 states and 15817 transitions. Word has length 262 [2020-10-27 00:22:39,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:22:39,678 INFO L481 AbstractCegarLoop]: Abstraction has 13262 states and 15817 transitions. [2020-10-27 00:22:39,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:22:39,678 INFO L276 IsEmpty]: Start isEmpty. Operand 13262 states and 15817 transitions. [2020-10-27 00:22:39,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-27 00:22:39,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:22:39,685 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 00:22:39,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:22:39,685 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:22:39,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:22:39,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1769136547, now seen corresponding path program 1 times [2020-10-27 00:22:39,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:22:39,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265500612] [2020-10-27 00:22:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:22:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:39,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:39,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:40,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:41,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:44,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:44,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-27 00:22:44,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:22:44,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 00:22:44,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:44,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:44,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:22:44,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 00:22:44,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:44,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:22:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:44,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:44,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:44,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:22:44,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:44,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:22:44,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:44,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:22:44,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:44,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:22:44,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:45,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:22:45,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:45,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:45,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:45,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:22:45,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:45,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-27 00:22:45,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:45,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:22:45,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:45,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:22:45,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:45,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:22:45,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:45,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:45,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:45,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:22:45,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:45,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-27 00:22:45,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:45,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:45,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:45,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:22:45,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:45,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-27 00:22:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:45,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:45,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:45,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:22:45,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:45,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 00:22:45,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:22:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:22:45,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:22:45,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 118 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 00:22:46,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265500612] [2020-10-27 00:22:46,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:22:46,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:22:46,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748342618] [2020-10-27 00:22:46,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:22:46,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:22:46,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:22:46,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:22:46,032 INFO L87 Difference]: Start difference. First operand 13262 states and 15817 transitions. Second operand 8 states. [2020-10-27 00:22:53,425 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 00:23:08,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:23:08,962 INFO L93 Difference]: Finished difference Result 27993 states and 33534 transitions. [2020-10-27 00:23:08,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:23:08,965 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 285 [2020-10-27 00:23:08,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:23:09,028 INFO L225 Difference]: With dead ends: 27993 [2020-10-27 00:23:09,028 INFO L226 Difference]: Without dead ends: 15605 [2020-10-27 00:23:09,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:23:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15605 states. [2020-10-27 00:23:09,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15605 to 15469. [2020-10-27 00:23:09,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15469 states. [2020-10-27 00:23:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15469 states to 15469 states and 18200 transitions. [2020-10-27 00:23:09,547 INFO L78 Accepts]: Start accepts. Automaton has 15469 states and 18200 transitions. Word has length 285 [2020-10-27 00:23:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:23:09,547 INFO L481 AbstractCegarLoop]: Abstraction has 15469 states and 18200 transitions. [2020-10-27 00:23:09,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:23:09,547 INFO L276 IsEmpty]: Start isEmpty. Operand 15469 states and 18200 transitions. [2020-10-27 00:23:09,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2020-10-27 00:23:09,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:23:09,557 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-27 00:23:09,557 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 00:23:09,557 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:23:09,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:23:09,558 INFO L82 PathProgramCache]: Analyzing trace with hash 534748085, now seen corresponding path program 1 times [2020-10-27 00:23:09,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:23:09,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345003267] [2020-10-27 00:23:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:23:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:23:09,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:09,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:23:10,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking...