/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=DEEPEST --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_label39.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 16:33:32,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 16:33:32,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 16:33:32,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 16:33:32,862 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 16:33:32,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 16:33:32,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 16:33:32,868 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 16:33:32,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 16:33:32,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 16:33:32,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 16:33:32,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 16:33:32,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 16:33:32,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 16:33:32,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 16:33:32,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 16:33:32,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 16:33:32,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 16:33:32,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 16:33:32,887 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 16:33:32,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 16:33:32,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 16:33:32,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 16:33:32,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 16:33:32,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 16:33:32,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 16:33:32,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 16:33:32,916 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 16:33:32,917 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 16:33:32,918 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 16:33:32,918 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 16:33:32,919 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 16:33:32,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 16:33:32,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 16:33:32,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 16:33:32,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 16:33:32,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 16:33:32,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 16:33:32,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 16:33:32,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 16:33:32,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 16:33:32,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 16:33:32,992 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 16:33:32,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 16:33:32,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 16:33:32,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 16:33:32,998 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 16:33:32,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 16:33:32,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 16:33:32,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 16:33:33,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 16:33:33,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 16:33:33,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 16:33:33,001 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 16:33:33,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 16:33:33,002 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 16:33:33,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 16:33:33,002 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 16:33:33,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 16:33:33,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 16:33:33,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 16:33:33,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 16:33:33,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 16:33:33,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:33:33,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 16:33:33,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 16:33:33,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 16:33:33,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 16:33:33,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 16:33:33,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 16:33:33,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 16:33:33,006 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 16:33:33,391 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 16:33:33,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 16:33:33,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 16:33:33,448 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 16:33:33,448 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 16:33:33,449 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem06_label39.c [2020-10-27 16:33:33,534 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/241a8ec0e/e7afdd0fde644383ba96a264466c0d05/FLAG383e1078d [2020-10-27 16:33:34,884 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 16:33:34,885 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem06_label39.c [2020-10-27 16:33:34,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/241a8ec0e/e7afdd0fde644383ba96a264466c0d05/FLAG383e1078d [2020-10-27 16:33:35,118 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/241a8ec0e/e7afdd0fde644383ba96a264466c0d05 [2020-10-27 16:33:35,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 16:33:35,131 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 16:33:35,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 16:33:35,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 16:33:35,139 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 16:33:35,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:33:35" (1/1) ... [2020-10-27 16:33:35,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fbf4f87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:33:35, skipping insertion in model container [2020-10-27 16:33:35,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 04:33:35" (1/1) ... [2020-10-27 16:33:35,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 16:33:35,402 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 16:33:38,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:33:38,025 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 16:33:39,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 16:33:39,290 INFO L208 MainTranslator]: Completed translation [2020-10-27 16:33:39,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:33:39 WrapperNode [2020-10-27 16:33:39,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 16:33:39,293 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 16:33:39,293 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 16:33:39,293 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 16:33:39,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:33:39" (1/1) ... [2020-10-27 16:33:39,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:33:39" (1/1) ... [2020-10-27 16:33:39,456 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:33:39" (1/1) ... [2020-10-27 16:33:39,457 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:33:39" (1/1) ... [2020-10-27 16:33:39,645 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:33:39" (1/1) ... [2020-10-27 16:33:39,681 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:33:39" (1/1) ... [2020-10-27 16:33:39,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:33:39" (1/1) ... [2020-10-27 16:33:39,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 16:33:39,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 16:33:39,787 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 16:33:39,787 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 16:33:39,788 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:33:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 16:33:39,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 16:33:39,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 16:33:39,975 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 16:33:39,975 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 16:33:39,975 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 16:33:39,976 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 16:33:39,976 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 16:33:39,976 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 16:33:39,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 16:33:39,976 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 16:33:39,976 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 16:33:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 16:33:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 16:33:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 16:33:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 16:33:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 16:33:39,977 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 16:33:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 16:33:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 16:33:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 16:33:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 16:33:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 16:33:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 16:33:39,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 16:33:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 16:33:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 16:33:39,979 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 16:33:51,549 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 16:33:51,550 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 16:33:51,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:33:51 BoogieIcfgContainer [2020-10-27 16:33:51,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 16:33:51,557 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 16:33:51,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 16:33:51,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 16:33:51,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 04:33:35" (1/3) ... [2020-10-27 16:33:51,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25015f52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:33:51, skipping insertion in model container [2020-10-27 16:33:51,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 04:33:39" (2/3) ... [2020-10-27 16:33:51,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25015f52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 04:33:51, skipping insertion in model container [2020-10-27 16:33:51,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 04:33:51" (3/3) ... [2020-10-27 16:33:51,564 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem06_label39.c [2020-10-27 16:33:51,576 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 16:33:51,582 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 16:33:51,596 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 16:33:51,631 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 16:33:51,631 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 16:33:51,631 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 16:33:51,631 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 16:33:51,631 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 16:33:51,631 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 16:33:51,632 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 16:33:51,632 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 16:33:51,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states. [2020-10-27 16:33:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 974 [2020-10-27 16:33:51,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:33:51,753 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] [2020-10-27 16:33:51,754 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:33:51,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:33:51,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1436205980, now seen corresponding path program 1 times [2020-10-27 16:33:51,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:33:51,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866901340] [2020-10-27 16:33:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:33:52,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:33:53,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:56,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:33:57,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:33:57,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 991 [2020-10-27 16:33:57,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:33:57,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5138 [2020-10-27 16:33:57,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:33:57,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 16:33:57,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 16:33:57,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 769 [2020-10-27 16:33:57,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 16:34:02,250 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-27 16:34:02,613 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-27 16:34:03,009 WARN L193 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-27 16:34:03,475 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-10-27 16:34:03,925 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-27 16:34:04,353 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 63 [2020-10-27 16:34:04,850 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2020-10-27 16:34:05,255 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-27 16:34:05,561 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-27 16:34:05,854 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-27 16:34:06,165 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-27 16:34:06,328 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-10-27 16:34:06,637 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-27 16:34:06,948 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2020-10-27 16:34:07,246 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 44 [2020-10-27 16:34:07,760 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:34:07,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:34:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:34:07,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:34:07,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:34:07,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:34:07,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:34:07,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 16:34:07,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:34:07,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:34:07,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:34:07,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 16:34:07,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:34:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:34:19,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866901340] [2020-10-27 16:34:19,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 16:34:19,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-27 16:34:19,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210035613] [2020-10-27 16:34:19,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 16:34:19,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:34:19,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 16:34:19,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-27 16:34:19,422 INFO L87 Difference]: Start difference. First operand 1319 states. Second operand 18 states. [2020-10-27 16:34:20,319 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-27 16:34:22,103 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 206 DAG size of output: 199 [2020-10-27 16:34:23,832 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 206 DAG size of output: 199 [2020-10-27 16:34:25,698 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 221 DAG size of output: 210 [2020-10-27 16:34:32,750 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 234 DAG size of output: 208 [2020-10-27 16:34:39,263 WARN L193 SmtUtils]: Spent 2.64 s on a formula simplification. DAG size of input: 236 DAG size of output: 206 [2020-10-27 16:34:44,025 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 212 DAG size of output: 197 [2020-10-27 16:34:45,983 WARN L193 SmtUtils]: Spent 1.82 s on a formula simplification. DAG size of input: 222 DAG size of output: 205 [2020-10-27 16:34:48,566 WARN L193 SmtUtils]: Spent 2.00 s on a formula simplification. DAG size of input: 226 DAG size of output: 203 [2020-10-27 16:35:04,438 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 201 DAG size of output: 191 [2020-10-27 16:35:06,150 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 207 DAG size of output: 196 [2020-10-27 16:35:11,540 WARN L193 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 213 DAG size of output: 196 [2020-10-27 16:35:23,723 WARN L193 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 203 DAG size of output: 190 [2020-10-27 16:35:25,596 WARN L193 SmtUtils]: Spent 1.70 s on a formula simplification. DAG size of input: 208 DAG size of output: 194 [2020-10-27 16:35:30,196 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 210 DAG size of output: 192 [2020-10-27 16:35:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:35:50,671 INFO L93 Difference]: Finished difference Result 3401 states and 6365 transitions. [2020-10-27 16:35:50,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 16:35:50,674 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 973 [2020-10-27 16:35:50,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:35:50,725 INFO L225 Difference]: With dead ends: 3401 [2020-10-27 16:35:50,726 INFO L226 Difference]: Without dead ends: 2020 [2020-10-27 16:35:50,737 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 16:35:50,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2020 states. [2020-10-27 16:35:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2020 to 2020. [2020-10-27 16:35:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2020 states. [2020-10-27 16:35:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3054 transitions. [2020-10-27 16:35:50,941 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3054 transitions. Word has length 973 [2020-10-27 16:35:50,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:35:50,947 INFO L481 AbstractCegarLoop]: Abstraction has 2020 states and 3054 transitions. [2020-10-27 16:35:50,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 16:35:50,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3054 transitions. [2020-10-27 16:35:50,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1044 [2020-10-27 16:35:50,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:35:51,000 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] [2020-10-27 16:35:51,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 16:35:51,001 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:35:51,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:35:51,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1993203315, now seen corresponding path program 1 times [2020-10-27 16:35:51,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:35:51,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145133123] [2020-10-27 16:35:51,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:35:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:35:51,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:35:53,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:35:56,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:35:56,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1063 [2020-10-27 16:35:56,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 16:35:56,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5179 [2020-10-27 16:35:56,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:35:56,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 16:35:56,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 16:35:56,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 979 [2020-10-27 16:35:56,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:35:57,546 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:35:57,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:35:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:35:57,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:35:57,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:35:57,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:35:57,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:35:57,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 16:35:57,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:35:57,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:35:57,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:35:57,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:35:57,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:35:57,730 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:35:57,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:35:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:35:57,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:35:57,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:35:57,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 16:35:57,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:35:57,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 16:35:57,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:35:57,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:35:57,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:35:57,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 16:35:57,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:35:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 66 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 16:35:58,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145133123] [2020-10-27 16:35:58,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:35:58,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 16:35:58,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590100] [2020-10-27 16:35:58,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 16:35:58,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:35:58,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 16:35:58,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 16:35:58,863 INFO L87 Difference]: Start difference. First operand 2020 states and 3054 transitions. Second operand 5 states. [2020-10-27 16:35:59,314 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-27 16:36:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:36:21,512 INFO L93 Difference]: Finished difference Result 4409 states and 7432 transitions. [2020-10-27 16:36:21,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 16:36:21,514 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1043 [2020-10-27 16:36:21,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:36:21,537 INFO L225 Difference]: With dead ends: 4409 [2020-10-27 16:36:21,537 INFO L226 Difference]: Without dead ends: 3149 [2020-10-27 16:36:21,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 16:36:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2020-10-27 16:36:21,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 3128. [2020-10-27 16:36:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3128 states. [2020-10-27 16:36:21,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 4644 transitions. [2020-10-27 16:36:21,654 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 4644 transitions. Word has length 1043 [2020-10-27 16:36:21,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:36:21,658 INFO L481 AbstractCegarLoop]: Abstraction has 3128 states and 4644 transitions. [2020-10-27 16:36:21,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 16:36:21,658 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 4644 transitions. [2020-10-27 16:36:21,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1057 [2020-10-27 16:36:21,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:36:21,679 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:36:21,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 16:36:21,680 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:36:21,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:36:21,681 INFO L82 PathProgramCache]: Analyzing trace with hash -458535149, now seen corresponding path program 1 times [2020-10-27 16:36:21,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:36:21,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085151883] [2020-10-27 16:36:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:36:21,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:36:21,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:36:22,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:36:24,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:36:27,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:36:27,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1078 [2020-10-27 16:36:27,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:36:27,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5214 [2020-10-27 16:36:27,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:36:27,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:36:27,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 16:36:27,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 16:36:27,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:36:28,037 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:36:28,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:36:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:36:28,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:36:28,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:36:28,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:36:28,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:36:28,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 16:36:28,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:36:28,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:36:28,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:36:28,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:36:28,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:36:28,231 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:36:28,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:36:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:36:28,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:36:28,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:36:28,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 16:36:28,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:36:28,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-27 16:36:28,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:36:28,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:36:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:36:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 16:36:28,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:36:28,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-27 16:36:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:36:28,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:36:28,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:36:28,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 16:36:28,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:36:28,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-27 16:36:28,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:36:28,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:36:28,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:36:28,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 16:36:28,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:36:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 16:36:29,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085151883] [2020-10-27 16:36:29,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:36:29,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:36:29,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774623542] [2020-10-27 16:36:29,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:36:29,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:36:29,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:36:29,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:36:29,253 INFO L87 Difference]: Start difference. First operand 3128 states and 4644 transitions. Second operand 7 states. [2020-10-27 16:36:30,318 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-27 16:36:32,181 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-27 16:36:56,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 16:36:56,843 INFO L93 Difference]: Finished difference Result 6653 states and 10201 transitions. [2020-10-27 16:36:56,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 16:36:56,846 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1056 [2020-10-27 16:36:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 16:36:56,870 INFO L225 Difference]: With dead ends: 6653 [2020-10-27 16:36:56,870 INFO L226 Difference]: Without dead ends: 4285 [2020-10-27 16:36:56,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 16:36:56,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4285 states. [2020-10-27 16:36:57,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4285 to 4229. [2020-10-27 16:36:57,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4229 states. [2020-10-27 16:36:57,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4229 states to 4229 states and 5971 transitions. [2020-10-27 16:36:57,018 INFO L78 Accepts]: Start accepts. Automaton has 4229 states and 5971 transitions. Word has length 1056 [2020-10-27 16:36:57,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 16:36:57,019 INFO L481 AbstractCegarLoop]: Abstraction has 4229 states and 5971 transitions. [2020-10-27 16:36:57,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 16:36:57,019 INFO L276 IsEmpty]: Start isEmpty. Operand 4229 states and 5971 transitions. [2020-10-27 16:36:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1073 [2020-10-27 16:36:57,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 16:36:57,046 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 16:36:57,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 16:36:57,047 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 16:36:57,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 16:36:57,047 INFO L82 PathProgramCache]: Analyzing trace with hash -167387452, now seen corresponding path program 1 times [2020-10-27 16:36:57,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 16:36:57,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684515121] [2020-10-27 16:36:57,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 16:36:57,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:36:57,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:36:57,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:36:58,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:37:02,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:37:02,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 1096 [2020-10-27 16:37:02,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 16:37:02,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-27 16:37:02,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:37:02,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:37:02,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 16:37:02,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 16:37:02,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:37:02,920 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-27 16:37:02,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 16:37:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:37:02,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:37:02,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:37:02,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 16:37:02,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:37:02,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 16:37:02,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:37:02,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:37:02,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:37:02,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:37:02,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:37:03,113 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-27 16:37:03,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 16:37:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:37:03,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:37:03,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:37:03,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 16:37:03,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:37:03,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 16:37:03,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:37:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 16:37:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:37:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 16:37:03,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:37:03,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-10-27 16:37:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:37:03,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:37:03,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:37:03,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-27 16:37:03,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:37:03,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 16:37:03,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:37:03,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 16:37:03,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 16:37:03,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 16:37:03,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:37:03,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-10-27 16:37:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 16:37:03,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 16:37:03,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 16:37:03,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-27 16:37:03,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 16:37:03,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 16:37:03,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 16:37:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 16:37:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 16:37:03,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 16:37:03,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 16:37:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-27 16:37:04,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684515121] [2020-10-27 16:37:04,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 16:37:04,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 16:37:04,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579852966] [2020-10-27 16:37:04,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 16:37:04,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 16:37:04,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 16:37:04,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 16:37:04,010 INFO L87 Difference]: Start difference. First operand 4229 states and 5971 transitions. Second operand 7 states. [2020-10-27 16:37:05,085 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-27 16:37:05,652 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification that was a NOOP. DAG size: 159