/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_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:05:04,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:05:04,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:05:05,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:05:05,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:05:05,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:05:05,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:05:05,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:05:05,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:05:05,056 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:05:05,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:05:05,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:05:05,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:05:05,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:05:05,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:05:05,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:05:05,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:05:05,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:05:05,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:05:05,089 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:05:05,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:05:05,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:05:05,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:05:05,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:05:05,109 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:05:05,109 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:05:05,110 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:05:05,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:05:05,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:05:05,115 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:05:05,116 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:05:05,117 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:05:05,119 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:05:05,120 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:05:05,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:05:05,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:05:05,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:05:05,123 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:05:05,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:05:05,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:05:05,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:05:05,134 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 00:05:05,189 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:05:05,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:05:05,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:05:05,195 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:05:05,195 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:05:05,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:05:05,196 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:05:05,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:05:05,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:05:05,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:05:05,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:05:05,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:05:05,199 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:05:05,199 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:05:05,199 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:05:05,199 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:05:05,200 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:05:05,200 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:05:05,200 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:05:05,200 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:05:05,201 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:05:05,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:05:05,201 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:05:05,202 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:05:05,202 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:05:05,202 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:05:05,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:05:05,203 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:05:05,203 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:05:05,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:05:05,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:05:05,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:05:05,730 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:05:05,731 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:05:05,732 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:05:05,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label01.c [2020-10-27 00:05:05,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/484c5894c/2e84e8b5d6f140109cabdf1072589150/FLAG590fae05b [2020-10-27 00:05:06,818 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:05:06,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label01.c [2020-10-27 00:05:06,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/484c5894c/2e84e8b5d6f140109cabdf1072589150/FLAG590fae05b [2020-10-27 00:05:07,298 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/484c5894c/2e84e8b5d6f140109cabdf1072589150 [2020-10-27 00:05:07,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:05:07,311 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:05:07,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:05:07,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:05:07,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:05:07,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:05:07" (1/1) ... [2020-10-27 00:05:07,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c3578e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:07, skipping insertion in model container [2020-10-27 00:05:07,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:05:07" (1/1) ... [2020-10-27 00:05:07,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:05:07,447 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:05:08,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:05:08,609 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:05:09,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:05:09,194 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:05:09,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:09 WrapperNode [2020-10-27 00:05:09,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:05:09,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:05:09,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:05:09,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:05:09,212 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:09" (1/1) ... [2020-10-27 00:05:09,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:09" (1/1) ... [2020-10-27 00:05:09,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:09" (1/1) ... [2020-10-27 00:05:09,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:09" (1/1) ... [2020-10-27 00:05:09,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:09" (1/1) ... [2020-10-27 00:05:09,489 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:09" (1/1) ... [2020-10-27 00:05:09,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:09" (1/1) ... [2020-10-27 00:05:09,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:05:09,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:05:09,549 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:05:09,549 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:05:09,550 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:09" (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 00:05:09,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:05:09,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:05:09,641 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:05:09,641 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:05:09,641 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:05:09,642 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:05:09,642 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:05:09,642 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:05:09,643 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:05:09,643 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:05:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:05:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:05:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:05:09,644 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:05:09,645 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:05:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:05:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:05:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:05:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:05:09,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:05:09,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:05:19,782 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:05:19,782 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:05:19,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:05:19 BoogieIcfgContainer [2020-10-27 00:05:19,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:05:19,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:05:19,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:05:19,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:05:19,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:05:07" (1/3) ... [2020-10-27 00:05:19,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2af454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:05:19, skipping insertion in model container [2020-10-27 00:05:19,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:05:09" (2/3) ... [2020-10-27 00:05:19,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2af454 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:05:19, skipping insertion in model container [2020-10-27 00:05:19,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:05:19" (3/3) ... [2020-10-27 00:05:19,796 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label01.c [2020-10-27 00:05:19,809 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:05:19,816 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:05:19,832 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:05:19,865 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:05:19,866 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:05:19,866 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:05:19,866 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:05:19,866 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:05:19,866 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:05:19,866 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:05:19,867 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:05:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:05:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 00:05:19,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:05:19,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:05:19,912 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:05:19,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:05:19,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1789549405, now seen corresponding path program 1 times [2020-10-27 00:05:19,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:05:19,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026367229] [2020-10-27 00:05:19,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:05:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:20,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:20,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:20,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 00:05:20,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:05:20,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-27 00:05:20,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:20,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:05:20,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:05:20,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 00:05:20,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:05:21,023 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:05:21,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:05:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:21,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:21,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:21,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:05:21,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:05:21,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 00:05:21,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:21,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:05:21,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:05:21,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:05:21,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:05:21,118 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 00:05:21,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026367229] [2020-10-27 00:05:21,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:05:21,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 00:05:21,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975966163] [2020-10-27 00:05:21,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:05:21,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:05:21,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:05:21,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:05:21,149 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 5 states. [2020-10-27 00:05:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:05:41,379 INFO L93 Difference]: Finished difference Result 2174 states and 4022 transitions. [2020-10-27 00:05:41,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:05:41,381 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-10-27 00:05:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:05:41,414 INFO L225 Difference]: With dead ends: 2174 [2020-10-27 00:05:41,414 INFO L226 Difference]: Without dead ends: 1473 [2020-10-27 00:05:41,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:05:41,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2020-10-27 00:05:41,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1444. [2020-10-27 00:05:41,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1444 states. [2020-10-27 00:05:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1444 states to 1444 states and 2114 transitions. [2020-10-27 00:05:41,581 INFO L78 Accepts]: Start accepts. Automaton has 1444 states and 2114 transitions. Word has length 53 [2020-10-27 00:05:41,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:05:41,582 INFO L481 AbstractCegarLoop]: Abstraction has 1444 states and 2114 transitions. [2020-10-27 00:05:41,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:05:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1444 states and 2114 transitions. [2020-10-27 00:05:41,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 00:05:41,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:05:41,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:41,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:05:41,597 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:05:41,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:05:41,598 INFO L82 PathProgramCache]: Analyzing trace with hash 2104992322, now seen corresponding path program 1 times [2020-10-27 00:05:41,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:05:41,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716050813] [2020-10-27 00:05:41,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:05:41,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:41,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:42,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:43,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:43,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:43,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 00:05:43,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:05:43,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1639 [2020-10-27 00:05:43,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:43,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:05:43,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:05:43,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-27 00:05:43,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:05:43,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:05:43,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:43,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:43,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:43,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:05:43,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:05:43,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 00:05:43,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:43,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:05:43,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:05:43,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:05:43,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:05:43,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:05:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:43,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:43,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:05:43,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:05:43,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:05:43,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:05:43,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 334 [2020-10-27 00:05:43,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:05:43,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:05:43,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:05:43,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:05:43,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:05:44,021 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:05:44,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716050813] [2020-10-27 00:05:44,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:05:44,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:05:44,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109829696] [2020-10-27 00:05:44,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:05:44,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:05:44,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:05:44,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:05:44,028 INFO L87 Difference]: Start difference. First operand 1444 states and 2114 transitions. Second operand 6 states. [2020-10-27 00:05:59,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:05:59,644 INFO L93 Difference]: Finished difference Result 3810 states and 5676 transitions. [2020-10-27 00:05:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:05:59,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2020-10-27 00:05:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:05:59,662 INFO L225 Difference]: With dead ends: 3810 [2020-10-27 00:05:59,663 INFO L226 Difference]: Without dead ends: 2372 [2020-10-27 00:05:59,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:05:59,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2372 states. [2020-10-27 00:05:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2372 to 2364. [2020-10-27 00:05:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2364 states. [2020-10-27 00:05:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2364 states to 2364 states and 3059 transitions. [2020-10-27 00:05:59,781 INFO L78 Accepts]: Start accepts. Automaton has 2364 states and 3059 transitions. Word has length 124 [2020-10-27 00:05:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:05:59,784 INFO L481 AbstractCegarLoop]: Abstraction has 2364 states and 3059 transitions. [2020-10-27 00:05:59,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:05:59,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2364 states and 3059 transitions. [2020-10-27 00:05:59,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-27 00:05:59,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:05:59,795 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:59,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:05:59,795 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:05:59,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:05:59,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1230913225, now seen corresponding path program 1 times [2020-10-27 00:05:59,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:05:59,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580657484] [2020-10-27 00:05:59,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:05:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:05:59,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:00,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:01,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:01,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-27 00:06:01,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:06:01,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1564 [2020-10-27 00:06:01,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:06:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:06:01,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 00:06:01,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:01,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:06:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:01,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:01,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:01,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:06:01,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:01,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 00:06:01,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:01,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:06:01,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:06:01,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:06:01,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:01,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:06:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:01,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:02,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:02,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:06:02,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:02,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-27 00:06:02,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:02,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:06:02,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:06:02,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:06:02,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:06:02,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580657484] [2020-10-27 00:06:02,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:06:02,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:06:02,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349288452] [2020-10-27 00:06:02,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:06:02,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:06:02,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:06:02,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:06:02,219 INFO L87 Difference]: Start difference. First operand 2364 states and 3059 transitions. Second operand 8 states. [2020-10-27 00:06:03,095 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-27 00:06:21,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:06:21,918 INFO L93 Difference]: Finished difference Result 5302 states and 7260 transitions. [2020-10-27 00:06:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:06:21,924 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-10-27 00:06:21,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:06:21,943 INFO L225 Difference]: With dead ends: 5302 [2020-10-27 00:06:21,943 INFO L226 Difference]: Without dead ends: 3334 [2020-10-27 00:06:21,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:06:21,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2020-10-27 00:06:22,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 3291. [2020-10-27 00:06:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3291 states. [2020-10-27 00:06:22,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3291 states to 3291 states and 4369 transitions. [2020-10-27 00:06:22,047 INFO L78 Accepts]: Start accepts. Automaton has 3291 states and 4369 transitions. Word has length 127 [2020-10-27 00:06:22,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:06:22,048 INFO L481 AbstractCegarLoop]: Abstraction has 3291 states and 4369 transitions. [2020-10-27 00:06:22,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:06:22,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3291 states and 4369 transitions. [2020-10-27 00:06:22,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-27 00:06:22,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:06:22,053 INFO L422 BasicCegarLoop]: trace histogram [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, 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] [2020-10-27 00:06:22,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:06:22,053 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:06:22,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:06:22,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1537307073, now seen corresponding path program 1 times [2020-10-27 00:06:22,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:06:22,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142666984] [2020-10-27 00:06:22,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:06:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:22,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:22,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:23,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:23,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-27 00:06:23,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:06:23,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1333 [2020-10-27 00:06:23,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:23,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:06:23,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:06:23,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:06:23,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:23,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:06:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:23,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:23,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:23,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:06:23,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:23,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:06:23,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:23,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:06:23,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:06:23,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:06:23,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:23,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:06:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:23,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:23,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:23,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:06:23,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:23,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-27 00:06:23,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:23,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:06:23,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:06:23,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:06:23,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:23,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:06:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:23,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:23,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:23,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 00:06:23,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:23,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-10-27 00:06:23,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:23,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:06:23,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:06:23,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 00:06:23,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:24,156 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:06:24,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142666984] [2020-10-27 00:06:24,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:06:24,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:06:24,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480633240] [2020-10-27 00:06:24,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:06:24,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:06:24,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:06:24,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:06:24,166 INFO L87 Difference]: Start difference. First operand 3291 states and 4369 transitions. Second operand 7 states. [2020-10-27 00:06:42,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:06:42,294 INFO L93 Difference]: Finished difference Result 8600 states and 12455 transitions. [2020-10-27 00:06:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:06:42,295 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 209 [2020-10-27 00:06:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:06:42,336 INFO L225 Difference]: With dead ends: 8600 [2020-10-27 00:06:42,336 INFO L226 Difference]: Without dead ends: 5748 [2020-10-27 00:06:42,346 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:06:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5748 states. [2020-10-27 00:06:42,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5748 to 5587. [2020-10-27 00:06:42,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5587 states. [2020-10-27 00:06:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 7264 transitions. [2020-10-27 00:06:42,535 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 7264 transitions. Word has length 209 [2020-10-27 00:06:42,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:06:42,536 INFO L481 AbstractCegarLoop]: Abstraction has 5587 states and 7264 transitions. [2020-10-27 00:06:42,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:06:42,536 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 7264 transitions. [2020-10-27 00:06:42,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-27 00:06:42,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:06:42,543 INFO L422 BasicCegarLoop]: trace histogram [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, 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 00:06:42,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:06:42,543 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:06:42,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:06:42,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1525017835, now seen corresponding path program 1 times [2020-10-27 00:06:42,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:06:42,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481949617] [2020-10-27 00:06:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:06:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:42,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:42,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:44,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:47,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:47,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-27 00:06:47,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:06:47,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-27 00:06:47,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:47,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:06:47,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:06:47,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 00:06:47,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:47,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:06:47,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:47,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:47,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:47,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:06:47,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:47,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:06:47,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:47,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:06:47,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:06:47,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:06:47,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:47,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:06:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:47,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:48,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:48,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:06:48,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:48,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 215 [2020-10-27 00:06:48,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:06:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:06:48,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:06:48,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:48,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:06:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:06:48,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:06:48,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:06:48,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:06:48,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:06:48,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-27 00:06:48,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:06:48,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:06:48,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:06:48,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:06:48,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:06:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-10-27 00:06:48,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481949617] [2020-10-27 00:06:48,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:06:48,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 00:06:48,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385019172] [2020-10-27 00:06:48,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 00:06:48,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:06:48,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 00:06:48,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-27 00:06:48,532 INFO L87 Difference]: Start difference. First operand 5587 states and 7264 transitions. Second operand 9 states. [2020-10-27 00:06:49,612 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:06:58,347 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:07:33,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:07:33,554 INFO L93 Difference]: Finished difference Result 15594 states and 22903 transitions. [2020-10-27 00:07:33,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 00:07:33,557 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 215 [2020-10-27 00:07:33,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:07:33,630 INFO L225 Difference]: With dead ends: 15594 [2020-10-27 00:07:33,630 INFO L226 Difference]: Without dead ends: 10446 [2020-10-27 00:07:33,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-10-27 00:07:33,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10446 states. [2020-10-27 00:07:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10446 to 10209. [2020-10-27 00:07:33,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10209 states. [2020-10-27 00:07:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10209 states to 10209 states and 13523 transitions. [2020-10-27 00:07:33,997 INFO L78 Accepts]: Start accepts. Automaton has 10209 states and 13523 transitions. Word has length 215 [2020-10-27 00:07:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:07:33,998 INFO L481 AbstractCegarLoop]: Abstraction has 10209 states and 13523 transitions. [2020-10-27 00:07:33,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 00:07:33,998 INFO L276 IsEmpty]: Start isEmpty. Operand 10209 states and 13523 transitions. [2020-10-27 00:07:34,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-27 00:07:34,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:07:34,003 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 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 00:07:34,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:07:34,004 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:07:34,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:07:34,004 INFO L82 PathProgramCache]: Analyzing trace with hash 211516469, now seen corresponding path program 1 times [2020-10-27 00:07:34,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:07:34,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704922282] [2020-10-27 00:07:34,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:07:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:34,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:34,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:34,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:39,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:39,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 240 [2020-10-27 00:07:39,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:07:39,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 00:07:39,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:39,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:07:39,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:07:39,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-27 00:07:39,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:39,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:07:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:39,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:39,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:39,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:07:39,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:39,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 00:07:39,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:39,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:07:39,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:39,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:07:39,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:39,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:07:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:39,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:39,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:39,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:07:39,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:07:39,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-27 00:07:39,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:39,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:07:39,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:07:39,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:07:39,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:39,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:07:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:07:39,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:39,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:07:39,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:07:39,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:07:39,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:07:39,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-27 00:07:39,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:07:39,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:07:39,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:07:39,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:07:39,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:07:39,893 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:07:39,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704922282] [2020-10-27 00:07:39,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:07:39,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:07:39,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865433705] [2020-10-27 00:07:39,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:07:39,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:07:39,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:07:39,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:07:39,896 INFO L87 Difference]: Start difference. First operand 10209 states and 13523 transitions. Second operand 6 states. [2020-10-27 00:08:05,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:08:05,096 INFO L93 Difference]: Finished difference Result 23703 states and 33621 transitions. [2020-10-27 00:08:05,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:08:05,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 226 [2020-10-27 00:08:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:08:05,220 INFO L225 Difference]: With dead ends: 23703 [2020-10-27 00:08:05,220 INFO L226 Difference]: Without dead ends: 13933 [2020-10-27 00:08:05,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:08:05,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13933 states. [2020-10-27 00:08:05,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13933 to 13801. [2020-10-27 00:08:05,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13801 states. [2020-10-27 00:08:05,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13801 states to 13801 states and 19394 transitions. [2020-10-27 00:08:05,872 INFO L78 Accepts]: Start accepts. Automaton has 13801 states and 19394 transitions. Word has length 226 [2020-10-27 00:08:05,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:08:05,873 INFO L481 AbstractCegarLoop]: Abstraction has 13801 states and 19394 transitions. [2020-10-27 00:08:05,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:08:05,874 INFO L276 IsEmpty]: Start isEmpty. Operand 13801 states and 19394 transitions. [2020-10-27 00:08:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-27 00:08:05,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:08:05,880 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:08:05,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:08:05,881 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:08:05,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:08:05,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1350911312, now seen corresponding path program 1 times [2020-10-27 00:08:05,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:08:05,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261030433] [2020-10-27 00:08:05,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:08:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:06,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:06,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:06,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:08,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:10,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:10,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-27 00:08:10,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:08:10,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-10-27 00:08:10,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:10,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:08:10,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:08:11,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 00:08:11,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:11,171 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:08:11,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:08:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:11,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:11,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:11,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:08:11,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:11,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 00:08:11,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:11,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:08:11,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:08:11,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:08:11,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:08:11,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:08:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:11,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:11,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:11,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:08:11,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:11,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-27 00:08:11,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:08:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:08:11,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:08:11,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:11,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2020-10-27 00:08:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:11,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:11,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:11,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:08:11,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:11,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 00:08:11,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:11,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:08:11,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:08:11,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:08:11,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 90 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:08:12,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261030433] [2020-10-27 00:08:12,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:08:12,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:08:12,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615472139] [2020-10-27 00:08:12,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:08:12,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:08:12,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:08:12,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:08:12,004 INFO L87 Difference]: Start difference. First operand 13801 states and 19394 transitions. Second operand 7 states. [2020-10-27 00:08:12,183 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 00:08:17,452 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 00:08:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:08:35,798 INFO L93 Difference]: Finished difference Result 30234 states and 43063 transitions. [2020-10-27 00:08:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:08:35,804 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 233 [2020-10-27 00:08:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:08:35,889 INFO L225 Difference]: With dead ends: 30234 [2020-10-27 00:08:35,890 INFO L226 Difference]: Without dead ends: 16872 [2020-10-27 00:08:35,934 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:08:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16872 states. [2020-10-27 00:08:36,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16872 to 16652. [2020-10-27 00:08:36,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16652 states. [2020-10-27 00:08:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16652 states to 16652 states and 23203 transitions. [2020-10-27 00:08:36,577 INFO L78 Accepts]: Start accepts. Automaton has 16652 states and 23203 transitions. Word has length 233 [2020-10-27 00:08:36,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:08:36,578 INFO L481 AbstractCegarLoop]: Abstraction has 16652 states and 23203 transitions. [2020-10-27 00:08:36,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:08:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 16652 states and 23203 transitions. [2020-10-27 00:08:36,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-27 00:08:36,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:08:36,584 INFO L422 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:08:36,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:08:36,585 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:08:36,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:08:36,586 INFO L82 PathProgramCache]: Analyzing trace with hash 873014052, now seen corresponding path program 1 times [2020-10-27 00:08:36,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:08:36,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139750091] [2020-10-27 00:08:36,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:08:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:36,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:36,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:38,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:38,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:39,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:41,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:41,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-27 00:08:41,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:08:41,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 00:08:41,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:08:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:08:41,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-27 00:08:41,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:41,864 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:08:41,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:08:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:41,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:41,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:41,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:08:41,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:41,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 00:08:41,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:41,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:08:41,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:08:41,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:08:41,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:41,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:08:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:41,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:42,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:42,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 00:08:42,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:42,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-27 00:08:42,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:42,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:08:42,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:08:42,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 00:08:42,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:42,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-27 00:08:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:08:42,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:08:42,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:08:42,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:08:42,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:08:42,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-27 00:08:42,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:08:42,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:08:42,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:08:42,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:08:42,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:08:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 90 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:08:42,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139750091] [2020-10-27 00:08:42,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:08:42,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:08:42,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138350281] [2020-10-27 00:08:42,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:08:42,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:08:42,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:08:42,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:08:42,516 INFO L87 Difference]: Start difference. First operand 16652 states and 23203 transitions. Second operand 7 states. [2020-10-27 00:08:42,729 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:08:48,850 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 66