/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_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 21:31:58,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 21:31:58,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 21:31:58,833 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 21:31:58,834 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 21:31:58,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 21:31:58,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 21:31:58,840 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 21:31:58,842 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 21:31:58,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 21:31:58,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 21:31:58,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 21:31:58,846 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 21:31:58,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 21:31:58,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 21:31:58,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 21:31:58,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 21:31:58,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 21:31:58,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 21:31:58,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 21:31:58,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 21:31:58,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 21:31:58,869 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 21:31:58,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 21:31:58,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 21:31:58,873 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 21:31:58,873 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 21:31:58,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 21:31:58,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 21:31:58,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 21:31:58,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 21:31:58,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 21:31:58,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 21:31:58,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 21:31:58,881 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 21:31:58,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 21:31:58,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 21:31:58,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 21:31:58,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 21:31:58,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 21:31:58,884 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 21:31:58,885 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 21:31:58,916 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 21:31:58,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 21:31:58,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 21:31:58,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 21:31:58,920 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 21:31:58,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 21:31:58,920 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 21:31:58,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 21:31:58,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 21:31:58,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 21:31:58,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 21:31:58,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 21:31:58,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 21:31:58,922 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 21:31:58,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 21:31:58,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 21:31:58,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 21:31:58,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 21:31:58,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 21:31:58,923 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 21:31:58,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 21:31:58,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 21:31:58,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 21:31:58,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 21:31:58,926 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 21:31:58,926 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 21:31:58,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 21:31:58,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 21:31:58,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 21:31:58,927 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 21:31:59,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 21:31:59,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 21:31:59,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 21:31:59,371 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 21:31:59,372 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 21:31:59,373 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label21.c [2020-10-26 21:31:59,440 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/278d7f9f6/90f3bf42472e4ad8ac10d3e13bf14948/FLAG5f2a48400 [2020-10-26 21:32:00,624 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 21:32:00,624 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label21.c [2020-10-26 21:32:00,687 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/278d7f9f6/90f3bf42472e4ad8ac10d3e13bf14948/FLAG5f2a48400 [2020-10-26 21:32:00,870 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/278d7f9f6/90f3bf42472e4ad8ac10d3e13bf14948 [2020-10-26 21:32:00,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 21:32:00,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 21:32:00,886 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 21:32:00,886 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 21:32:00,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 21:32:00,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:32:00" (1/1) ... [2020-10-26 21:32:00,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28a64add and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:00, skipping insertion in model container [2020-10-26 21:32:00,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 09:32:00" (1/1) ... [2020-10-26 21:32:00,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 21:32:01,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 21:32:03,275 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:32:03,293 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 21:32:04,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 21:32:04,576 INFO L208 MainTranslator]: Completed translation [2020-10-26 21:32:04,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 09:32:04 WrapperNode [2020-10-26 21:32:04,577 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 21:32:04,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 21:32:04,579 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 21:32:04,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 21:32:04,593 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 21:32:04,595 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 21:32:04,709 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 21:32:04,710 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 21:32:04,912 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 21:32:04,947 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 21:32:05,016 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 21:32:05,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 21:32:05,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 21:32:05,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 21:32:05,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 21:32:05,103 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 21:32:05,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 21:32:05,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 21:32:05,306 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 21:32:05,306 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 21:32:05,306 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 21:32:05,307 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 21:32:05,307 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 21:32:05,307 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-26 21:32:05,307 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 21:32:05,307 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 21:32:05,307 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 21:32:05,308 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 21:32:05,308 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 21:32:05,308 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-26 21:32:05,308 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 21:32:05,308 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 21:32:05,308 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 21:32:05,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 21:32:05,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 21:32:05,309 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 21:32:05,309 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 21:32:05,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 21:32:05,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 21:32:05,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 21:32:05,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 21:32:05,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 21:32:05,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 21:32:13,076 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 21:32:13,077 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 21:32:13,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 09:32:13 BoogieIcfgContainer [2020-10-26 21:32:13,081 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 21:32:13,083 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 21:32:13,083 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 21:32:13,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 21:32:13,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 09:32:00" (1/3) ... [2020-10-26 21:32:13,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64094f41 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 21:32:13,088 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 21:32:13,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64094f41 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 21:32:13,089 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 21:32:13,090 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label21.c [2020-10-26 21:32:13,102 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 21:32:13,107 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 21:32:13,121 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 21:32:13,155 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 21:32:13,155 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 21:32:13,155 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 21:32:13,155 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 21:32:13,155 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 21:32:13,155 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 21:32:13,156 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 21:32:13,156 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 21:32:13,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-26 21:32:13,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 947 [2020-10-26 21:32:13,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:32:13,264 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] [2020-10-26 21:32:13,264 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:32:13,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:32:13,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1662968176, now seen corresponding path program 1 times [2020-10-26 21:32:13,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:32:13,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44905960] [2020-10-26 21:32:13,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:32:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:14,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:16,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:19,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:19,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 964 [2020-10-26 21:32:19,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:32:19,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5137 [2020-10-26 21:32:19,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:19,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 21:32:19,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:32:19,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-26 21:32:19,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 21:32:23,850 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 70 [2020-10-26 21:32:24,125 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2020-10-26 21:32:24,583 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 87 [2020-10-26 21:32:25,001 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 80 [2020-10-26 21:32:25,484 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 76 [2020-10-26 21:32:25,677 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-26 21:32:25,881 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2020-10-26 21:32:26,045 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-26 21:32:26,236 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-26 21:32:26,396 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-26 21:32:26,909 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:32:26,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:32:26,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:32:26,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:32:26,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:32:26,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:32:26,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:32:26,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-26 21:32:26,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:32:26,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:32:26,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:32:26,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:32:26,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:32:39,715 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 21:32:39,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44905960] [2020-10-26 21:32:39,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:32:39,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-26 21:32:39,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615898368] [2020-10-26 21:32:39,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:32:39,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:32:39,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:32:39,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:32:39,755 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-26 21:32:40,180 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-26 21:32:40,900 WARN L193 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 189 [2020-10-26 21:32:41,628 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 189 [2020-10-26 21:32:42,440 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 193 [2020-10-26 21:32:46,252 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 192 [2020-10-26 21:32:49,324 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 195 [2020-10-26 21:32:51,846 WARN L193 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 193 [2020-10-26 21:32:52,588 WARN L193 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 199 [2020-10-26 21:32:53,620 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 198 [2020-10-26 21:33:03,142 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 191 [2020-10-26 21:33:03,906 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 196 [2020-10-26 21:33:06,842 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 195 [2020-10-26 21:33:14,265 WARN L193 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 189 [2020-10-26 21:33:15,018 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 193 [2020-10-26 21:33:17,464 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 191 [2020-10-26 21:33:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:33:29,792 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-26 21:33:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 21:33:29,795 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 946 [2020-10-26 21:33:29,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:33:29,842 INFO L225 Difference]: With dead ends: 3401 [2020-10-26 21:33:29,842 INFO L226 Difference]: Without dead ends: 2020 [2020-10-26 21:33:29,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:33:29,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-26 21:33:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-26 21:33:30,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-26 21:33:30,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-26 21:33:30,030 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 946 [2020-10-26 21:33:30,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:33:30,033 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-26 21:33:30,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:33:30,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-26 21:33:30,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1017 [2020-10-26 21:33:30,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:33:30,081 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] [2020-10-26 21:33:30,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 21:33:30,082 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:33:30,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:33:30,083 INFO L82 PathProgramCache]: Analyzing trace with hash 194549273, now seen corresponding path program 1 times [2020-10-26 21:33:30,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:33:30,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291730522] [2020-10-26 21:33:30,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:33:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:30,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:32,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:35,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:35,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1036 [2020-10-26 21:33:35,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:33:35,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5247 [2020-10-26 21:33:35,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:35,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 21:33:35,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:33:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 21:33:35,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:35,902 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:33:35,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:33:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:35,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:35,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:35,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:33:35,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:33:35,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 21:33:35,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:35,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:33:35,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:33:35,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:33:35,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:36,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:33:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:36,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:33:36,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:33:36,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 21:33:36,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:33:36,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-26 21:33:36,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:33:36,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 21:33:36,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:33:36,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 21:33:36,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:33:37,226 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 21:33:37,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291730522] [2020-10-26 21:33:37,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 21:33:37,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 21:33:37,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363680647] [2020-10-26 21:33:37,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 21:33:37,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:33:37,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 21:33:37,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 21:33:37,232 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 7 states. [2020-10-26 21:33:37,452 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-26 21:33:38,695 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2020-10-26 21:33:58,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:33:58,665 INFO L93 Difference]: Finished difference Result 4488 states and 7527 transitions. [2020-10-26 21:33:58,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 21:33:58,666 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1016 [2020-10-26 21:33:58,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:33:58,685 INFO L225 Difference]: With dead ends: 4488 [2020-10-26 21:33:58,685 INFO L226 Difference]: Without dead ends: 3228 [2020-10-26 21:33:58,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 21:33:58,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3228 states. [2020-10-26 21:33:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3228 to 3148. [2020-10-26 21:33:58,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3148 states. [2020-10-26 21:33:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3148 states to 3148 states and 4654 transitions. [2020-10-26 21:33:58,796 INFO L78 Accepts]: Start accepts. Automaton has 3148 states and 4654 transitions. Word has length 1016 [2020-10-26 21:33:58,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:33:58,797 INFO L481 AbstractCegarLoop]: Abstraction has 3148 states and 4654 transitions. [2020-10-26 21:33:58,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 21:33:58,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3148 states and 4654 transitions. [2020-10-26 21:33:58,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1069 [2020-10-26 21:33:58,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:33:58,817 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] [2020-10-26 21:33:58,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 21:33:58,818 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:33:58,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:33:58,819 INFO L82 PathProgramCache]: Analyzing trace with hash 481859420, now seen corresponding path program 1 times [2020-10-26 21:33:58,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:33:58,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278249066] [2020-10-26 21:33:58,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:33:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:33:59,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:00,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:04,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:04,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1088 [2020-10-26 21:34:04,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:34:04,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5306 [2020-10-26 21:34:04,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:04,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 21:34:04,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:34:04,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 552 [2020-10-26 21:34:04,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:07,962 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-26 21:34:08,424 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 78 [2020-10-26 21:34:08,704 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 79 [2020-10-26 21:34:09,073 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 73 [2020-10-26 21:34:09,318 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 66 [2020-10-26 21:34:09,576 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2020-10-26 21:34:09,864 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 69 [2020-10-26 21:34:10,247 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 73 [2020-10-26 21:34:10,628 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 69 [2020-10-26 21:34:11,001 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 66 [2020-10-26 21:34:11,205 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-26 21:34:11,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 21:34:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:11,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:11,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:11,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 21:34:11,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:11,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-26 21:34:11,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:11,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 21:34:11,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 21:34:11,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 21:34:11,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:11,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 21:34:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:34:11,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:34:11,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:34:11,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 21:34:11,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 21:34:11,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-26 21:34:11,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:34:11,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 21:34:11,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 21:34:11,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-26 21:34:11,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 21:34:12,215 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-26 21:34:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 21:34:22,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278249066] [2020-10-26 21:34:22,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 21:34:22,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 21:34:22,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122747872] [2020-10-26 21:34:22,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 21:34:22,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 21:34:22,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 21:34:22,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-26 21:34:22,830 INFO L87 Difference]: Start difference. First operand 3148 states and 4654 transitions. Second operand 18 states. [2020-10-26 21:34:23,167 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-26 21:34:25,179 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 78 [2020-10-26 21:34:25,432 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-26 21:34:25,743 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 77 [2020-10-26 21:34:26,684 WARN L193 SmtUtils]: Spent 875.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 200 [2020-10-26 21:34:27,678 WARN L193 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 210 [2020-10-26 21:34:29,166 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 209 [2020-10-26 21:34:32,311 WARN L193 SmtUtils]: Spent 889.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 208 [2020-10-26 21:34:34,722 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-26 21:34:37,327 WARN L193 SmtUtils]: Spent 525.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 177 [2020-10-26 21:34:43,051 WARN L193 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 201 [2020-10-26 21:34:44,086 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 215 [2020-10-26 21:34:46,215 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification. DAG size of input: 254 DAG size of output: 212 [2020-10-26 21:34:57,339 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 257 DAG size of output: 209 [2020-10-26 21:34:59,167 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 261 DAG size of output: 205 [2020-10-26 21:35:39,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 21:35:39,022 INFO L93 Difference]: Finished difference Result 9150 states and 14920 transitions. [2020-10-26 21:35:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 21:35:39,025 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 1068 [2020-10-26 21:35:39,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 21:35:39,059 INFO L225 Difference]: With dead ends: 9150 [2020-10-26 21:35:39,059 INFO L226 Difference]: Without dead ends: 6762 [2020-10-26 21:35:39,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=234, Invalid=822, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 21:35:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6762 states. [2020-10-26 21:35:39,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6762 to 6739. [2020-10-26 21:35:39,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6739 states. [2020-10-26 21:35:39,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6739 states to 6739 states and 8452 transitions. [2020-10-26 21:35:39,258 INFO L78 Accepts]: Start accepts. Automaton has 6739 states and 8452 transitions. Word has length 1068 [2020-10-26 21:35:39,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 21:35:39,259 INFO L481 AbstractCegarLoop]: Abstraction has 6739 states and 8452 transitions. [2020-10-26 21:35:39,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 21:35:39,259 INFO L276 IsEmpty]: Start isEmpty. Operand 6739 states and 8452 transitions. [2020-10-26 21:35:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1094 [2020-10-26 21:35:39,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 21:35:39,317 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 21:35:39,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 21:35:39,317 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 21:35:39,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 21:35:39,318 INFO L82 PathProgramCache]: Analyzing trace with hash -70672130, now seen corresponding path program 1 times [2020-10-26 21:35:39,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 21:35:39,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827244155] [2020-10-26 21:35:39,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 21:35:39,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 21:35:40,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:40,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 21:35:44,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 21:35:44,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1115 [2020-10-26 21:35:44,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 21:35:44,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5201 [2020-10-26 21:35:44,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 21:35:44,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 21:35:44,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 21:35:44,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 891 [2020-10-26 21:35:44,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0