/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/Problem19_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:14:37,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:14:37,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:14:37,765 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:14:37,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:14:37,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:14:37,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:14:37,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:14:37,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:14:37,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:14:37,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:14:37,796 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:14:37,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:14:37,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:14:37,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:14:37,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:14:37,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:14:37,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:14:37,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:14:37,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:14:37,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:14:37,833 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:14:37,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:14:37,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:14:37,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:14:37,847 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:14:37,847 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:14:37,850 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:14:37,850 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:14:37,851 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:14:37,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:14:37,854 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:14:37,856 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:14:37,857 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:14:37,858 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:14:37,858 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:14:37,859 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:14:37,859 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:14:37,859 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:14:37,861 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:14:37,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:14:37,869 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 14:14:37,927 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:14:37,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:14:37,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:14:37,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:14:37,934 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:14:37,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:14:37,934 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:14:37,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:14:37,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:14:37,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:14:37,936 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:14:37,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:14:37,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:14:37,937 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:14:37,937 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:14:37,937 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:14:37,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:14:37,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:14:37,938 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:14:37,938 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:14:37,938 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:14:37,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:14:37,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:14:37,939 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:14:37,939 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:14:37,939 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:14:37,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:14:37,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:14:37,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:14:37,940 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:14:38,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:14:38,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:14:38,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:14:38,427 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:14:38,428 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:14:38,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label44.c [2020-10-28 14:14:38,516 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7fa96b808/c0b358953a9e4d71985565600c2997f5/FLAG8d59c7bd8 [2020-10-28 14:14:39,773 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:14:39,773 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label44.c [2020-10-28 14:14:39,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7fa96b808/c0b358953a9e4d71985565600c2997f5/FLAG8d59c7bd8 [2020-10-28 14:14:40,056 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7fa96b808/c0b358953a9e4d71985565600c2997f5 [2020-10-28 14:14:40,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:14:40,067 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:14:40,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:14:40,070 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:14:40,074 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:14:40,075 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:14:40" (1/1) ... [2020-10-28 14:14:40,079 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13136ba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:40, skipping insertion in model container [2020-10-28 14:14:40,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:14:40" (1/1) ... [2020-10-28 14:14:40,089 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:14:40,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:14:42,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:14:42,716 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:14:43,798 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:14:43,942 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:14:43,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43 WrapperNode [2020-10-28 14:14:43,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:14:43,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:14:43,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:14:43,945 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:14:43,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... [2020-10-28 14:14:43,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... [2020-10-28 14:14:44,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... [2020-10-28 14:14:44,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... [2020-10-28 14:14:44,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... [2020-10-28 14:14:44,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... [2020-10-28 14:14:44,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (1/1) ... [2020-10-28 14:14:44,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:14:44,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:14:44,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:14:44,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:14:44,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (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 14:14:44,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:14:44,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:14:44,639 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:14:44,639 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:14:44,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:14:44,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:14:44,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:14:44,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:14:44,640 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:14:44,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:14:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:14:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:14:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:14:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:14:44,641 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:14:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:14:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:14:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:14:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:14:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:14:44,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:14:44,643 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:14:44,643 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:14:44,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:14:44,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:14:44,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:14:44,643 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:14:44,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:14:44,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:14:58,974 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:14:58,975 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:14:58,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:14:58 BoogieIcfgContainer [2020-10-28 14:14:58,981 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:14:58,985 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:14:58,986 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:14:58,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:14:58,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:14:40" (1/3) ... [2020-10-28 14:14:58,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2a0dcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:14:58, skipping insertion in model container [2020-10-28 14:14:58,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:14:43" (2/3) ... [2020-10-28 14:14:58,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2a0dcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:14:58, skipping insertion in model container [2020-10-28 14:14:58,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:14:58" (3/3) ... [2020-10-28 14:14:58,994 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label44.c [2020-10-28 14:14:59,011 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:14:59,019 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:14:59,035 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:14:59,086 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:14:59,087 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:14:59,087 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:14:59,087 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:14:59,087 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:14:59,087 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:14:59,088 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:14:59,088 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:14:59,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:14:59,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:14:59,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:14:59,159 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] [2020-10-28 14:14:59,159 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:14:59,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:14:59,165 INFO L82 PathProgramCache]: Analyzing trace with hash -219806178, now seen corresponding path program 1 times [2020-10-28 14:14:59,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:14:59,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [262050932] [2020-10-28 14:14:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:14:59,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:59,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:00,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:00,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:15:00,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:15:00,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-28 14:15:00,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:00,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:00,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:15:00,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:15:00,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 14:15:00,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:15:00,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:15:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:00,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:00,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:00,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:15:00,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:15:00,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 14:15:00,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:00,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:00,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:15:00,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:15:00,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:15:00,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:15:00,239 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 14:15:00,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [262050932] [2020-10-28 14:15:00,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:15:00,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:15:00,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617038408] [2020-10-28 14:15:00,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:15:00,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:15:00,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:15:00,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:15:00,271 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-28 14:15:29,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:15:29,942 INFO L93 Difference]: Finished difference Result 5091 states and 9567 transitions. [2020-10-28 14:15:29,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:15:29,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-28 14:15:29,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:15:30,000 INFO L225 Difference]: With dead ends: 5091 [2020-10-28 14:15:30,001 INFO L226 Difference]: Without dead ends: 3246 [2020-10-28 14:15:30,018 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 14:15:30,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2020-10-28 14:15:30,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 3179. [2020-10-28 14:15:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3179 states. [2020-10-28 14:15:30,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 5850 transitions. [2020-10-28 14:15:30,293 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 5850 transitions. Word has length 41 [2020-10-28 14:15:30,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:15:30,294 INFO L481 AbstractCegarLoop]: Abstraction has 3179 states and 5850 transitions. [2020-10-28 14:15:30,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:15:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 5850 transitions. [2020-10-28 14:15:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 14:15:30,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:15:30,307 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:15:30,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:15:30,309 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:15:30,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:15:30,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1289608848, now seen corresponding path program 1 times [2020-10-28 14:15:30,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:15:30,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463142415] [2020-10-28 14:15:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:15:30,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:30,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:30,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:30,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:31,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:31,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-28 14:15:31,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:15:31,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1272 [2020-10-28 14:15:31,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:31,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:31,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:15:31,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-28 14:15:31,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:15:31,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:15:31,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:15:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:31,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:31,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:31,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:15:31,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:15:31,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 14:15:31,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:31,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:31,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:15:31,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:15:31,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:15:31,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:15:31,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:15:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:15:31,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:15:31,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:15:31,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 14:15:31,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:15:31,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-28 14:15:31,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:15:31,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:15:31,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:15:31,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-28 14:15:31,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:15:31,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:15:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:15:32,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [463142415] [2020-10-28 14:15:32,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:15:32,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:15:32,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729776609] [2020-10-28 14:15:32,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:15:32,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:15:32,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:15:32,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:15:32,046 INFO L87 Difference]: Start difference. First operand 3179 states and 5850 transitions. Second operand 5 states. [2020-10-28 14:16:09,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:16:09,479 INFO L93 Difference]: Finished difference Result 9273 states and 17286 transitions. [2020-10-28 14:16:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:16:09,480 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 112 [2020-10-28 14:16:09,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:16:09,522 INFO L225 Difference]: With dead ends: 9273 [2020-10-28 14:16:09,522 INFO L226 Difference]: Without dead ends: 6100 [2020-10-28 14:16:09,533 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:16:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6100 states. [2020-10-28 14:16:09,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6100 to 6034. [2020-10-28 14:16:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6034 states. [2020-10-28 14:16:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 10314 transitions. [2020-10-28 14:16:09,768 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 10314 transitions. Word has length 112 [2020-10-28 14:16:09,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:16:09,771 INFO L481 AbstractCegarLoop]: Abstraction has 6034 states and 10314 transitions. [2020-10-28 14:16:09,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:16:09,771 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 10314 transitions. [2020-10-28 14:16:09,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 14:16:09,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:16:09,784 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:09,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:16:09,784 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:16:09,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:16:09,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1756670209, now seen corresponding path program 1 times [2020-10-28 14:16:09,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:16:09,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427257876] [2020-10-28 14:16:09,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:16:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:09,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:10,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:10,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:10,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 14:16:10,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:16:10,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 988 [2020-10-28 14:16:10,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:10,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:10,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:16:10,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:16:10,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-28 14:16:10,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:16:10,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:16:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:10,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:11,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:11,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:16:11,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:11,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 14:16:11,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:11,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:11,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:16:11,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:16:11,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:16:11,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:16:11,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:16:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:11,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:11,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:11,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 14:16:11,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:11,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-28 14:16:11,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:11,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:11,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:16:11,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:16:11,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 14:16:11,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:16:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:16:11,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427257876] [2020-10-28 14:16:11,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:16:11,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:16:11,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551912918] [2020-10-28 14:16:11,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:16:11,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:16:11,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:16:11,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:16:11,441 INFO L87 Difference]: Start difference. First operand 6034 states and 10314 transitions. Second operand 8 states. [2020-10-28 14:16:11,592 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:16:57,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:16:57,409 INFO L93 Difference]: Finished difference Result 16397 states and 28063 transitions. [2020-10-28 14:16:57,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:16:57,411 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 117 [2020-10-28 14:16:57,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:16:57,475 INFO L225 Difference]: With dead ends: 16397 [2020-10-28 14:16:57,475 INFO L226 Difference]: Without dead ends: 10369 [2020-10-28 14:16:57,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:16:57,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10369 states. [2020-10-28 14:16:57,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10369 to 10358. [2020-10-28 14:16:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10358 states. [2020-10-28 14:16:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10358 states to 10358 states and 16841 transitions. [2020-10-28 14:16:57,821 INFO L78 Accepts]: Start accepts. Automaton has 10358 states and 16841 transitions. Word has length 117 [2020-10-28 14:16:57,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:16:57,824 INFO L481 AbstractCegarLoop]: Abstraction has 10358 states and 16841 transitions. [2020-10-28 14:16:57,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:16:57,824 INFO L276 IsEmpty]: Start isEmpty. Operand 10358 states and 16841 transitions. [2020-10-28 14:16:57,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 14:16:57,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:16:57,837 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:16:57,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:16:57,837 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:16:57,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:16:57,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1168260425, now seen corresponding path program 1 times [2020-10-28 14:16:57,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:16:57,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937723807] [2020-10-28 14:16:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:16:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:57,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:58,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:58,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:59,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:59,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:59,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-28 14:16:59,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 14:16:59,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1553 [2020-10-28 14:16:59,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:59,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:59,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:16:59,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:16:59,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-28 14:16:59,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:16:59,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:16:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:59,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:59,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:59,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:16:59,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:59,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 14:16:59,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:59,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:59,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:16:59,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:16:59,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:16:59,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:16:59,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:16:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:16:59,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:16:59,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:16:59,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 14:16:59,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:16:59,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-28 14:16:59,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:16:59,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:16:59,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:16:59,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:16:59,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 14:16:59,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:16:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:16:59,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937723807] [2020-10-28 14:16:59,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:16:59,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:16:59,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439684377] [2020-10-28 14:16:59,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:16:59,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:16:59,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:16:59,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:16:59,991 INFO L87 Difference]: Start difference. First operand 10358 states and 16841 transitions. Second operand 8 states. [2020-10-28 14:18:35,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:18:35,570 INFO L93 Difference]: Finished difference Result 30969 states and 51330 transitions. [2020-10-28 14:18:35,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:18:35,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 121 [2020-10-28 14:18:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:18:35,697 INFO L225 Difference]: With dead ends: 30969 [2020-10-28 14:18:35,698 INFO L226 Difference]: Without dead ends: 20617 [2020-10-28 14:18:35,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:18:35,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20617 states. [2020-10-28 14:18:36,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20617 to 20596. [2020-10-28 14:18:36,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20596 states. [2020-10-28 14:18:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20596 states to 20596 states and 30145 transitions. [2020-10-28 14:18:36,434 INFO L78 Accepts]: Start accepts. Automaton has 20596 states and 30145 transitions. Word has length 121 [2020-10-28 14:18:36,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:18:36,437 INFO L481 AbstractCegarLoop]: Abstraction has 20596 states and 30145 transitions. [2020-10-28 14:18:36,437 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:18:36,437 INFO L276 IsEmpty]: Start isEmpty. Operand 20596 states and 30145 transitions. [2020-10-28 14:18:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-28 14:18:36,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:18:36,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:18:36,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:18:36,441 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:18:36,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:18:36,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2124421379, now seen corresponding path program 1 times [2020-10-28 14:18:36,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:18:36,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587897106] [2020-10-28 14:18:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:18:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:36,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:36,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:37,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:38,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:38,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-28 14:18:38,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:18:38,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1778 [2020-10-28 14:18:38,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:38,265 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:38,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:18:38,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:18:38,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-28 14:18:38,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:18:38,443 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:18:38,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:18:38,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:38,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:38,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:38,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:18:38,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:18:38,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 14:18:38,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:38,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:38,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:18:38,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:18:38,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:18:38,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:18:38,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:18:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:18:38,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:18:38,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:18:38,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 14:18:38,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:18:38,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-28 14:18:38,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:18:38,833 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:18:38,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:18:38,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:18:38,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-28 14:18:38,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:18:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:18:38,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587897106] [2020-10-28 14:18:38,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:18:38,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:18:38,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648825896] [2020-10-28 14:18:38,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:18:38,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:18:38,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:18:38,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:18:38,978 INFO L87 Difference]: Start difference. First operand 20596 states and 30145 transitions. Second operand 7 states. [2020-10-28 14:18:39,163 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 68