/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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/Problem13_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 12:39:27,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 12:39:27,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 12:39:27,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 12:39:27,778 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 12:39:27,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 12:39:27,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 12:39:27,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 12:39:27,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 12:39:27,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 12:39:27,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 12:39:27,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 12:39:27,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 12:39:27,813 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 12:39:27,815 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 12:39:27,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 12:39:27,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 12:39:27,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 12:39:27,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 12:39:27,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 12:39:27,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 12:39:27,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 12:39:27,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 12:39:27,833 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 12:39:27,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 12:39:27,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 12:39:27,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 12:39:27,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 12:39:27,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 12:39:27,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 12:39:27,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 12:39:27,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 12:39:27,847 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 12:39:27,849 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 12:39:27,851 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 12:39:27,851 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 12:39:27,853 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 12:39:27,854 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 12:39:27,854 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 12:39:27,856 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 12:39:27,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 12:39:27,860 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 [2020-10-28 12:39:27,895 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 12:39:27,895 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 12:39:27,897 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 12:39:27,898 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 12:39:27,898 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 12:39:27,898 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 12:39:27,898 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 12:39:27,899 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 12:39:27,899 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 12:39:27,899 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 12:39:27,900 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 12:39:27,900 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 12:39:27,900 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 12:39:27,900 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 12:39:27,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 12:39:27,901 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 12:39:27,901 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 12:39:27,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 12:39:27,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 12:39:27,902 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 12:39:27,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 12:39:27,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 12:39:27,903 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 12:39:27,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 12:39:27,904 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 12:39:27,904 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 12:39:27,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 12:39:27,905 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 12:39:27,905 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 12:39:27,905 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 12:39:28,494 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 12:39:28,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 12:39:28,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 12:39:28,568 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 12:39:28,569 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 12:39:28,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label39.c [2020-10-28 12:39:28,671 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94e0b0467/8ed418eafac5466da0649bad4b5bda82/FLAGa3f318e5e [2020-10-28 12:39:30,100 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 12:39:30,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label39.c [2020-10-28 12:39:30,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94e0b0467/8ed418eafac5466da0649bad4b5bda82/FLAGa3f318e5e [2020-10-28 12:39:30,383 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/94e0b0467/8ed418eafac5466da0649bad4b5bda82 [2020-10-28 12:39:30,388 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 12:39:30,400 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 12:39:30,406 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 12:39:30,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 12:39:30,413 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 12:39:30,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:39:30" (1/1) ... [2020-10-28 12:39:30,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c058000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:30, skipping insertion in model container [2020-10-28 12:39:30,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:39:30" (1/1) ... [2020-10-28 12:39:30,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 12:39:30,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 12:39:32,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:39:32,742 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 12:39:33,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 12:39:33,714 INFO L208 MainTranslator]: Completed translation [2020-10-28 12:39:33,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:33 WrapperNode [2020-10-28 12:39:33,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 12:39:33,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 12:39:33,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 12:39:33,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 12:39:33,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:33" (1/1) ... [2020-10-28 12:39:33,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:33" (1/1) ... [2020-10-28 12:39:33,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:33" (1/1) ... [2020-10-28 12:39:33,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:33" (1/1) ... [2020-10-28 12:39:34,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:33" (1/1) ... [2020-10-28 12:39:34,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:33" (1/1) ... [2020-10-28 12:39:34,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:33" (1/1) ... [2020-10-28 12:39:34,355 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 12:39:34,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 12:39:34,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 12:39:34,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 12:39:34,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:33" (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 [2020-10-28 12:39:34,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 12:39:34,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 12:39:34,462 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 12:39:34,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 12:39:34,462 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 12:39:34,464 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 12:39:34,464 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 12:39:34,465 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 12:39:34,465 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 12:39:34,466 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 12:39:34,467 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 12:39:34,467 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 12:39:34,468 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 12:39:34,468 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 12:39:34,468 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 12:39:34,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 12:39:34,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 12:39:34,469 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 12:39:34,470 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 12:39:34,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 12:39:34,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 12:39:34,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 12:39:34,470 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 12:39:34,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 12:39:34,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 12:39:46,488 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 12:39:46,488 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 12:39:46,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:39:46 BoogieIcfgContainer [2020-10-28 12:39:46,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 12:39:46,503 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 12:39:46,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 12:39:46,514 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 12:39:46,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:39:30" (1/3) ... [2020-10-28 12:39:46,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16886445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:39:46, skipping insertion in model container [2020-10-28 12:39:46,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:39:33" (2/3) ... [2020-10-28 12:39:46,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16886445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:39:46, skipping insertion in model container [2020-10-28 12:39:46,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:39:46" (3/3) ... [2020-10-28 12:39:46,525 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label39.c [2020-10-28 12:39:46,552 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 12:39:46,559 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 12:39:46,574 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 12:39:46,612 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 12:39:46,612 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 12:39:46,612 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 12:39:46,612 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 12:39:46,613 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 12:39:46,613 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 12:39:46,613 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 12:39:46,613 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 12:39:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-28 12:39:46,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 12:39:46,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:39:46,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:39:46,674 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:39:46,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:39:46,690 INFO L82 PathProgramCache]: Analyzing trace with hash -619813366, now seen corresponding path program 1 times [2020-10-28 12:39:46,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:39:46,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824295006] [2020-10-28 12:39:46,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:39:46,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:39:47,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:39:47,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:39:47,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 12:39:47,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:39:47,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 605 [2020-10-28 12:39:47,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:39:47,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:39:47,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:39:47,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:39:47,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 12:39:47,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 12:39:47,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:39:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:39:47,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:39:47,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:39:47,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:39:47,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:39:47,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-28 12:39:47,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:39:47,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:39:47,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:39:47,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:39:47,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:39:47,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:39:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:39:47,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824295006] [2020-10-28 12:39:47,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:39:47,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 12:39:47,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687878782] [2020-10-28 12:39:47,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 12:39:47,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:39:47,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 12:39:47,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 12:39:47,929 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-28 12:40:10,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:40:10,351 INFO L93 Difference]: Finished difference Result 3234 states and 5914 transitions. [2020-10-28 12:40:10,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:40:10,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-10-28 12:40:10,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:40:10,404 INFO L225 Difference]: With dead ends: 3234 [2020-10-28 12:40:10,405 INFO L226 Difference]: Without dead ends: 2026 [2020-10-28 12:40:10,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:40:10,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2020-10-28 12:40:10,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 2008. [2020-10-28 12:40:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2008 states. [2020-10-28 12:40:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 3289 transitions. [2020-10-28 12:40:10,656 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 3289 transitions. Word has length 58 [2020-10-28 12:40:10,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:40:10,657 INFO L481 AbstractCegarLoop]: Abstraction has 2008 states and 3289 transitions. [2020-10-28 12:40:10,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 12:40:10,658 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 3289 transitions. [2020-10-28 12:40:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 12:40:10,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:40:10,680 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:40:10,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 12:40:10,682 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:40:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:40:10,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1518425278, now seen corresponding path program 1 times [2020-10-28 12:40:10,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:40:10,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746270137] [2020-10-28 12:40:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:40:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:10,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:11,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:12,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:13,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:13,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 12:40:13,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:40:13,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3002 [2020-10-28 12:40:13,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:13,785 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:13,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:40:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:40:13,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 12:40:13,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 12:40:13,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:40:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:13,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:13,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:13,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:40:13,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:40:13,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 12:40:13,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:13,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:13,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:40:13,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:40:13,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:40:13,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 12:40:14,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:40:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:14,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:14,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:14,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 12:40:14,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:40:14,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-28 12:40:14,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:14,241 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:14,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:40:14,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:40:14,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 12:40:14,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:40:14,418 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:40:14,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746270137] [2020-10-28 12:40:14,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:40:14,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:40:14,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120002570] [2020-10-28 12:40:14,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:40:14,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:40:14,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:40:14,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:40:14,425 INFO L87 Difference]: Start difference. First operand 2008 states and 3289 transitions. Second operand 7 states. [2020-10-28 12:40:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:40:35,417 INFO L93 Difference]: Finished difference Result 5798 states and 9558 transitions. [2020-10-28 12:40:35,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 12:40:35,421 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 133 [2020-10-28 12:40:35,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:40:35,444 INFO L225 Difference]: With dead ends: 5798 [2020-10-28 12:40:35,445 INFO L226 Difference]: Without dead ends: 3796 [2020-10-28 12:40:35,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-28 12:40:35,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3796 states. [2020-10-28 12:40:35,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3796 to 3696. [2020-10-28 12:40:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3696 states. [2020-10-28 12:40:35,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3696 states to 3696 states and 5276 transitions. [2020-10-28 12:40:35,578 INFO L78 Accepts]: Start accepts. Automaton has 3696 states and 5276 transitions. Word has length 133 [2020-10-28 12:40:35,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:40:35,578 INFO L481 AbstractCegarLoop]: Abstraction has 3696 states and 5276 transitions. [2020-10-28 12:40:35,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:40:35,579 INFO L276 IsEmpty]: Start isEmpty. Operand 3696 states and 5276 transitions. [2020-10-28 12:40:35,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-28 12:40:35,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:40:35,582 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:40:35,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 12:40:35,582 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:40:35,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:40:35,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1311406618, now seen corresponding path program 1 times [2020-10-28 12:40:35,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:40:35,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382389761] [2020-10-28 12:40:35,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:40:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:35,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:35,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:37,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:37,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-28 12:40:37,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:40:37,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1882 [2020-10-28 12:40:37,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:37,510 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:37,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 12:40:37,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 12:40:37,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-28 12:40:37,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:40:37,740 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:40:37,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:40:37,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:37,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:37,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:37,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:40:37,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:40:37,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 12:40:37,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:37,778 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:37,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:40:37,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:40:37,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 12:40:37,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:40:37,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:40:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:40:37,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:40:38,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:40:38,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 12:40:38,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:40:38,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-10-28 12:40:38,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:40:38,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:40:38,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:40:38,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:40:38,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 12:40:38,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 12:40:38,206 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:40:38,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382389761] [2020-10-28 12:40:38,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 12:40:38,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 12:40:38,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114442228] [2020-10-28 12:40:38,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:40:38,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:40:38,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:40:38,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:40:38,211 INFO L87 Difference]: Start difference. First operand 3696 states and 5276 transitions. Second operand 7 states. [2020-10-28 12:41:02,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:41:02,361 INFO L93 Difference]: Finished difference Result 10948 states and 15818 transitions. [2020-10-28 12:41:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:41:02,362 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 163 [2020-10-28 12:41:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:41:02,404 INFO L225 Difference]: With dead ends: 10948 [2020-10-28 12:41:02,404 INFO L226 Difference]: Without dead ends: 7258 [2020-10-28 12:41:02,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:41:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7258 states. [2020-10-28 12:41:02,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7258 to 7128. [2020-10-28 12:41:02,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7128 states. [2020-10-28 12:41:02,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7128 states to 7128 states and 9197 transitions. [2020-10-28 12:41:02,654 INFO L78 Accepts]: Start accepts. Automaton has 7128 states and 9197 transitions. Word has length 163 [2020-10-28 12:41:02,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:41:02,655 INFO L481 AbstractCegarLoop]: Abstraction has 7128 states and 9197 transitions. [2020-10-28 12:41:02,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:41:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 7128 states and 9197 transitions. [2020-10-28 12:41:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-28 12:41:02,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:41:02,659 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:41:02,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 12:41:02,660 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:41:02,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:41:02,660 INFO L82 PathProgramCache]: Analyzing trace with hash -847006833, now seen corresponding path program 1 times [2020-10-28 12:41:02,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:41:02,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165571634] [2020-10-28 12:41:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:41:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:02,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:03,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:03,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-28 12:41:03,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:03,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-28 12:41:03,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:03,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:03,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:41:03,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-28 12:41:03,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 12:41:03,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:41:03,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:41:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:03,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:03,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:03,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:41:03,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:03,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 12:41:03,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:03,376 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:03,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:41:03,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:41:03,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:41:03,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:41:03,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:41:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:03,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:03,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:03,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-28 12:41:03,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:03,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-28 12:41:03,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:03,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:03,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:41:03,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:41:03,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-28 12:41:03,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:41:03,739 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:41:03,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165571634] [2020-10-28 12:41:03,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:41:03,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:41:03,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601891735] [2020-10-28 12:41:03,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:41:03,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:41:03,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:41:03,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:41:03,742 INFO L87 Difference]: Start difference. First operand 7128 states and 9197 transitions. Second operand 5 states. [2020-10-28 12:41:30,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:41:30,963 INFO L93 Difference]: Finished difference Result 14430 states and 20011 transitions. [2020-10-28 12:41:30,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 12:41:30,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 187 [2020-10-28 12:41:30,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:41:31,015 INFO L225 Difference]: With dead ends: 14430 [2020-10-28 12:41:31,016 INFO L226 Difference]: Without dead ends: 10599 [2020-10-28 12:41:31,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 12:41:31,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10599 states. [2020-10-28 12:41:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10599 to 10589. [2020-10-28 12:41:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10589 states. [2020-10-28 12:41:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10589 states to 10589 states and 13276 transitions. [2020-10-28 12:41:31,325 INFO L78 Accepts]: Start accepts. Automaton has 10589 states and 13276 transitions. Word has length 187 [2020-10-28 12:41:31,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:41:31,326 INFO L481 AbstractCegarLoop]: Abstraction has 10589 states and 13276 transitions. [2020-10-28 12:41:31,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 12:41:31,326 INFO L276 IsEmpty]: Start isEmpty. Operand 10589 states and 13276 transitions. [2020-10-28 12:41:31,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-28 12:41:31,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:41:31,333 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:41:31,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 12:41:31,333 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:41:31,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:41:31,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1251695922, now seen corresponding path program 1 times [2020-10-28 12:41:31,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:41:31,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754494156] [2020-10-28 12:41:31,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:41:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:31,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:31,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:33,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:36,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:36,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-28 12:41:36,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 12:41:36,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 12:41:36,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:36,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:41:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-28 12:41:36,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 12:41:36,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:41:36,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:41:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:36,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:36,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:36,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:41:36,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:36,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:41:36,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:36,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:36,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:41:36,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:41:36,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:41:36,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:41:36,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:41:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:36,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:36,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:36,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 12:41:36,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:36,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-28 12:41:36,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:36,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:36,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:41:36,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:41:36,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-28 12:41:36,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:41:36,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-10-28 12:41:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:41:36,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:41:37,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:41:37,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 12:41:37,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:41:37,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-28 12:41:37,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:41:37,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:41:37,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:41:37,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:41:37,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 12:41:37,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:41:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 190 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:41:37,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754494156] [2020-10-28 12:41:37,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:41:37,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:41:37,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456288022] [2020-10-28 12:41:37,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:41:37,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:41:37,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:41:37,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:41:37,274 INFO L87 Difference]: Start difference. First operand 10589 states and 13276 transitions. Second operand 7 states. [2020-10-28 12:41:38,423 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 12:42:11,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:42:11,526 INFO L93 Difference]: Finished difference Result 25939 states and 35431 transitions. [2020-10-28 12:42:11,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 12:42:11,530 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 256 [2020-10-28 12:42:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:42:11,621 INFO L225 Difference]: With dead ends: 25939 [2020-10-28 12:42:11,621 INFO L226 Difference]: Without dead ends: 16159 [2020-10-28 12:42:11,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:42:11,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16159 states. [2020-10-28 12:42:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16159 to 15937. [2020-10-28 12:42:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15937 states. [2020-10-28 12:42:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15937 states to 15937 states and 20543 transitions. [2020-10-28 12:42:12,264 INFO L78 Accepts]: Start accepts. Automaton has 15937 states and 20543 transitions. Word has length 256 [2020-10-28 12:42:12,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:42:12,265 INFO L481 AbstractCegarLoop]: Abstraction has 15937 states and 20543 transitions. [2020-10-28 12:42:12,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:42:12,265 INFO L276 IsEmpty]: Start isEmpty. Operand 15937 states and 20543 transitions. [2020-10-28 12:42:12,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-28 12:42:12,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:42:12,272 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:42:12,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 12:42:12,273 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:42:12,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:42:12,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1698827945, now seen corresponding path program 1 times [2020-10-28 12:42:12,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:42:12,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528317830] [2020-10-28 12:42:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:42:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:12,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:12,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:13,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:13,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-28 12:42:13,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 12:42:13,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1608 [2020-10-28 12:42:13,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:13,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:13,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:42:13,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-28 12:42:13,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 12:42:13,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 12:42:14,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:42:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:14,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:14,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:14,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:42:14,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:42:14,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 12:42:14,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:14,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:14,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:42:14,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:42:14,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:42:14,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:42:14,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:42:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:14,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:14,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:14,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 12:42:14,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:42:14,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-28 12:42:14,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:14,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:14,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:42:14,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:42:14,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-28 12:42:14,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:42:14,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-28 12:42:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:14,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:42:14,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:42:14,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-28 12:42:14,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:42:14,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-28 12:42:14,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:42:14,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:42:14,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:42:14,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 12:42:14,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-28 12:42:14,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:42:14,760 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 197 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 12:42:14,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528317830] [2020-10-28 12:42:14,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:42:14,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 12:42:14,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7639352] [2020-10-28 12:42:14,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 12:42:14,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:42:14,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 12:42:14,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 12:42:14,765 INFO L87 Difference]: Start difference. First operand 15937 states and 20543 transitions. Second operand 7 states. [2020-10-28 12:42:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 12:42:58,250 INFO L93 Difference]: Finished difference Result 44423 states and 61405 transitions. [2020-10-28 12:42:58,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 12:42:58,255 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 263 [2020-10-28 12:42:58,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 12:42:58,408 INFO L225 Difference]: With dead ends: 44423 [2020-10-28 12:42:58,409 INFO L226 Difference]: Without dead ends: 29295 [2020-10-28 12:42:58,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 12:42:58,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29295 states. [2020-10-28 12:42:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29295 to 28954. [2020-10-28 12:42:59,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28954 states. [2020-10-28 12:42:59,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28954 states to 28954 states and 37076 transitions. [2020-10-28 12:42:59,398 INFO L78 Accepts]: Start accepts. Automaton has 28954 states and 37076 transitions. Word has length 263 [2020-10-28 12:42:59,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 12:42:59,398 INFO L481 AbstractCegarLoop]: Abstraction has 28954 states and 37076 transitions. [2020-10-28 12:42:59,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 12:42:59,399 INFO L276 IsEmpty]: Start isEmpty. Operand 28954 states and 37076 transitions. [2020-10-28 12:42:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-28 12:42:59,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 12:42:59,407 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 12:42:59,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 12:42:59,407 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 12:42:59,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 12:42:59,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1438079013, now seen corresponding path program 1 times [2020-10-28 12:42:59,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 12:42:59,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109924351] [2020-10-28 12:42:59,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 12:42:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:42:59,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:00,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:00,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 292 [2020-10-28 12:43:00,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:43:00,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-28 12:43:00,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:00,290 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:00,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 12:43:00,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 232 [2020-10-28 12:43:00,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 12:43:00,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:43:00,530 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 12:43:00,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 12:43:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:43:00,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:00,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:00,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 12:43:00,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:43:00,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 12:43:00,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:00,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:00,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 12:43:00,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:43:00,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 12:43:00,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:43:00,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 12:43:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 12:43:00,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 12:43:00,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 12:43:00,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-28 12:43:00,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 12:43:00,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 321 [2020-10-28 12:43:00,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 12:43:00,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 12:43:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 12:43:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 12:43:00,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-28 12:43:00,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 12:43:01,303 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 49 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 12:43:01,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109924351] [2020-10-28 12:43:01,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 12:43:01,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 12:43:01,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169378699] [2020-10-28 12:43:01,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 12:43:01,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 12:43:01,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 12:43:01,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 12:43:01,310 INFO L87 Difference]: Start difference. First operand 28954 states and 37076 transitions. Second operand 5 states. [2020-10-28 12:43:02,657 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 68