/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem06_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:31:58,859 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:31:58,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:31:58,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:31:58,910 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:31:58,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:31:58,921 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:31:58,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:31:58,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:31:58,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:31:58,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:31:58,941 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:31:58,942 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:31:58,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:31:58,949 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:31:58,951 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:31:58,952 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:31:58,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:31:58,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:31:58,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:31:58,989 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:31:58,990 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:31:58,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:31:58,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:31:59,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:31:59,001 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:31:59,001 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:31:59,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:31:59,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:31:59,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:31:59,006 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:31:59,006 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:31:59,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:31:59,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:31:59,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:31:59,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:31:59,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:31:59,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:31:59,012 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:31:59,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:31:59,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:31:59,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 21:31:59,067 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:31:59,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:31:59,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:31:59,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:31:59,069 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:31:59,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:31:59,069 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:31:59,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:31:59,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:31:59,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:31:59,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:31:59,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:31:59,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:31:59,071 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:31:59,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:31:59,071 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:31:59,071 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:31:59,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:31:59,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:31:59,072 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:31:59,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:31:59,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:31:59,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:31:59,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:31:59,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:31:59,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:31:59,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:31:59,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:31:59,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:31:59,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:31:59,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:31:59,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:31:59,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:31:59,481 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:31:59,482 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:31:59,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label22.c [2020-10-26 21:31:59,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22af3b568/2987d937541f4690849181e08fdd2791/FLAG748b36f1f [2020-10-26 21:32:00,841 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:32:00,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label22.c [2020-10-26 21:32:00,905 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22af3b568/2987d937541f4690849181e08fdd2791/FLAG748b36f1f [2020-10-26 21:32:01,037 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/22af3b568/2987d937541f4690849181e08fdd2791 [2020-10-26 21:32:01,041 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:32:01,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:32:01,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:32:01,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:32:01,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:32:01,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:32:01" (1/1) ... [2020-10-26 21:32:01,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@264ef112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:01, skipping insertion in model container [2020-10-26 21:32:01,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:32:01" (1/1) ... [2020-10-26 21:32:01,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:32:01,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:32:03,754 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:32:03,765 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:32:04,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:32:04,939 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:32:04,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:04 WrapperNode [2020-10-26 21:32:04,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:32:04,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:32:04,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:32:04,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:32:04,958 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:04" (1/1) ... [2020-10-26 21:32:04,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:04" (1/1) ... [2020-10-26 21:32:05,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:04" (1/1) ... [2020-10-26 21:32:05,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:04" (1/1) ... [2020-10-26 21:32:05,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:04" (1/1) ... [2020-10-26 21:32:05,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:04" (1/1) ... [2020-10-26 21:32:05,344 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:04" (1/1) ... [2020-10-26 21:32:05,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:32:05,406 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:32:05,406 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:32:05,406 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:32:05,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:32:05,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:32:05,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:32:05,503 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:32:05,503 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:32:05,504 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:32:05,504 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:32:05,504 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:32:05,504 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:32:05,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:32:05,505 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:32:05,505 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:32:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:32:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:32:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:32:05,506 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:32:05,507 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:32:05,507 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:32:05,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:32:05,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:32:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:32:05,604 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:32:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:32:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:32:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:32:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:32:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:32:05,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:32:13,731 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:32:13,732 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:32:13,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:32:13 BoogieIcfgContainer [2020-10-26 21:32:13,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:32:13,740 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:32:13,740 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:32:13,746 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:32:13,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:32:01" (1/3) ... [2020-10-26 21:32:13,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f72069b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:32:13, skipping insertion in model container [2020-10-26 21:32:13,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:04" (2/3) ... [2020-10-26 21:32:13,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f72069b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 09:32:13, skipping insertion in model container [2020-10-26 21:32:13,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:32:13" (3/3) ... [2020-10-26 21:32:13,749 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label22.c [2020-10-26 21:32:13,762 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:32:13,770 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:32:13,784 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:32:13,821 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:32:13,821 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:32:13,821 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:32:13,821 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:32:13,821 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:32:13,821 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:32:13,822 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:32:13,822 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:32:13,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:32:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 991 [2020-10-26 21:32:13,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:32:13,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:32:13,932 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:32:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:32:13,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1135089216, now seen corresponding path program 1 times [2020-10-26 21:32:13,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:32:13,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940212541] [2020-10-26 21:32:13,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:32:15,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:15,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:16,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:20,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:20,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1008 [2020-10-26 21:32:20,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:32:20,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5142 [2020-10-26 21:32:20,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:20,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 21:32:20,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:32:20,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-26 21:32:20,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 21:32:24,339 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-26 21:32:24,552 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-26 21:32:24,756 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-26 21:32:24,934 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-26 21:32:25,162 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-26 21:32:25,392 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-26 21:32:25,633 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-10-26 21:32:25,818 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-26 21:32:26,025 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-26 21:32:26,225 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-26 21:32:26,378 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-26 21:32:26,923 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:32:26,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:32:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:26,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:26,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:26,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:32:26,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:32:26,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-26 21:32:26,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:26,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:32:26,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:32:26,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:32:26,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:32:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:32:39,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1940212541] [2020-10-26 21:32:39,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:32:39,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 21:32:39,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588847505] [2020-10-26 21:32:39,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:32:39,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:32:39,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:32:39,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:32:39,386 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-26 21:32:39,997 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification that was a NOOP. DAG size: 186 [2020-10-26 21:32:41,012 WARN L193 SmtUtils]: Spent 887.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 197 [2020-10-26 21:32:42,008 WARN L193 SmtUtils]: Spent 900.00 ms on a formula simplification. DAG size of input: 204 DAG size of output: 197 [2020-10-26 21:32:43,076 WARN L193 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 205 [2020-10-26 21:32:48,158 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 235 DAG size of output: 204 [2020-10-26 21:32:52,289 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 238 DAG size of output: 203 [2020-10-26 21:32:55,299 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 194 [2020-10-26 21:32:56,434 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 228 DAG size of output: 204 [2020-10-26 21:32:57,859 WARN L193 SmtUtils]: Spent 1.00 s on a formula simplification. DAG size of input: 225 DAG size of output: 201 [2020-10-26 21:33:09,475 WARN L193 SmtUtils]: Spent 950.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 194 [2020-10-26 21:33:10,559 WARN L193 SmtUtils]: Spent 990.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 201 [2020-10-26 21:33:14,162 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 223 DAG size of output: 198 [2020-10-26 21:33:22,660 WARN L193 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 190 [2020-10-26 21:33:23,731 WARN L193 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 194 [2020-10-26 21:33:26,947 WARN L193 SmtUtils]: Spent 990.00 ms on a formula simplification. DAG size of input: 209 DAG size of output: 192 [2020-10-26 21:33:41,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:33:41,344 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-26 21:33:41,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 21:33:41,349 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 990 [2020-10-26 21:33:41,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:33:41,405 INFO L225 Difference]: With dead ends: 3401 [2020-10-26 21:33:41,405 INFO L226 Difference]: Without dead ends: 2020 [2020-10-26 21:33:41,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:33:41,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-26 21:33:41,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-26 21:33:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-26 21:33:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-26 21:33:41,603 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 990 [2020-10-26 21:33:41,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:33:41,607 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-26 21:33:41,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:33:41,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-26 21:33:41,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1061 [2020-10-26 21:33:41,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:33:41,656 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:33:41,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:33:41,664 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:33:41,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:33:41,666 INFO L82 PathProgramCache]: Analyzing trace with hash 911287369, now seen corresponding path program 1 times [2020-10-26 21:33:41,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:33:41,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775302267] [2020-10-26 21:33:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:33:41,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:41,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:44,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:47,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:47,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1080 [2020-10-26 21:33:47,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:33:47,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5282 [2020-10-26 21:33:47,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:47,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:33:47,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:33:47,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:33:47,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:48,367 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:33:48,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:33:48,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:48,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:48,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:48,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:33:48,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:33:48,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 21:33:48,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:33:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:33:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:33:48,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:48,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:33:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:48,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:48,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:48,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 21:33:48,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:33:48,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-26 21:33:48,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:48,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:33:48,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:33:48,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 21:33:48,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:33:50,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775302267] [2020-10-26 21:33:50,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:33:50,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:33:50,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055700751] [2020-10-26 21:33:50,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:33:50,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:33:50,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:33:50,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:33:50,170 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 7 states. [2020-10-26 21:33:50,457 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-26 21:33:51,873 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-26 21:34:16,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:34:16,112 INFO L93 Difference]: Finished difference Result 4487 states and 7526 transitions. [2020-10-26 21:34:16,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 21:34:16,113 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1060 [2020-10-26 21:34:16,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:34:16,133 INFO L225 Difference]: With dead ends: 4487 [2020-10-26 21:34:16,133 INFO L226 Difference]: Without dead ends: 3227 [2020-10-26 21:34:16,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 21:34:16,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3227 states. [2020-10-26 21:34:16,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3227 to 3155. [2020-10-26 21:34:16,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3155 states. [2020-10-26 21:34:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 4666 transitions. [2020-10-26 21:34:16,245 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 4666 transitions. Word has length 1060 [2020-10-26 21:34:16,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:34:16,246 INFO L481 AbstractCegarLoop]: Abstraction has 3155 states and 4666 transitions. [2020-10-26 21:34:16,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:34:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 4666 transitions. [2020-10-26 21:34:16,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1113 [2020-10-26 21:34:16,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:34:16,265 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 21:34:16,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:34:16,265 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:34:16,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:34:16,266 INFO L82 PathProgramCache]: Analyzing trace with hash 809929996, now seen corresponding path program 1 times [2020-10-26 21:34:16,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:34:16,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491748560] [2020-10-26 21:34:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:34:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:17,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:17,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:21,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:21,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1132 [2020-10-26 21:34:21,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:34:21,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5191 [2020-10-26 21:34:21,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:21,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 21:34:21,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:34:21,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 552 [2020-10-26 21:34:21,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:25,059 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 68 [2020-10-26 21:34:25,448 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2020-10-26 21:34:25,837 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 76 [2020-10-26 21:34:26,423 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 75 [2020-10-26 21:34:26,750 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 64 [2020-10-26 21:34:27,083 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2020-10-26 21:34:27,468 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 71 [2020-10-26 21:34:27,899 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 72 [2020-10-26 21:34:28,317 WARN L193 SmtUtils]: Spent 351.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 67 [2020-10-26 21:34:28,716 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 62 [2020-10-26 21:34:29,003 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:34:29,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:34:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:29,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:29,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:29,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:34:29,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:29,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-26 21:34:29,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:29,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:34:29,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:34:29,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:34:29,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:29,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:34:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:29,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:29,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:29,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:34:29,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:29,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-26 21:34:29,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:29,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 21:34:29,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:34:29,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:34:29,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:34:40,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491748560] [2020-10-26 21:34:40,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:34:40,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 21:34:40,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416135594] [2020-10-26 21:34:40,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:34:40,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:34:40,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:34:40,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:34:40,219 INFO L87 Difference]: Start difference. First operand 3155 states and 4666 transitions. Second operand 18 states. [2020-10-26 21:34:40,679 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-26 21:34:43,280 WARN L193 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 82 [2020-10-26 21:34:43,631 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-26 21:34:44,028 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 84 [2020-10-26 21:34:45,167 WARN L193 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 224 DAG size of output: 199 [2020-10-26 21:34:46,398 WARN L193 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 235 DAG size of output: 207 [2020-10-26 21:34:48,230 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 236 DAG size of output: 206 [2020-10-26 21:34:52,579 WARN L193 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 239 DAG size of output: 205 [2020-10-26 21:34:58,738 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 177 [2020-10-26 21:35:05,491 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 223 DAG size of output: 202 [2020-10-26 21:35:06,831 WARN L193 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 237 DAG size of output: 216 [2020-10-26 21:35:09,012 WARN L193 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 235 DAG size of output: 213 [2020-10-26 21:35:22,225 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 238 DAG size of output: 211 [2020-10-26 21:35:24,141 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 238 DAG size of output: 206