/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/Problem12_label31.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:54:29,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:54:29,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:54:29,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:54:29,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:54:29,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:54:29,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:54:29,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:54:29,776 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:54:29,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:54:29,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:54:29,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:54:29,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:54:29,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:54:29,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:54:29,785 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:54:29,786 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:54:29,787 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:54:29,789 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:54:29,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:54:29,794 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:54:29,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:54:29,797 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:54:29,798 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:54:29,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:54:29,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:54:29,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:54:29,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:54:29,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:54:29,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:54:29,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:54:29,831 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:54:29,832 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:54:29,833 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:54:29,834 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:54:29,835 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:54:29,835 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:54:29,836 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:54:29,836 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:54:29,837 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:54:29,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:54:29,839 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 22:54:29,868 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:54:29,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:54:29,870 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:54:29,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:54:29,871 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:54:29,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:54:29,871 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:54:29,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:54:29,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:54:29,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:54:29,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:54:29,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:54:29,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:54:29,873 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:54:29,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:54:29,874 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:54:29,874 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:54:29,874 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:54:29,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:54:29,875 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:54:29,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:54:29,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:54:29,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:54:29,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:54:29,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:54:29,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:54:29,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:54:29,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:54:29,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:54:29,877 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:54:30,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:54:30,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:54:30,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:54:30,288 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:54:30,289 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:54:30,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label31.c [2020-10-26 22:54:30,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d222804bc/bdfbba15600844f99eccd42ec9dd36d8/FLAGe8e7258fd [2020-10-26 22:54:31,501 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:54:31,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label31.c [2020-10-26 22:54:31,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d222804bc/bdfbba15600844f99eccd42ec9dd36d8/FLAGe8e7258fd [2020-10-26 22:54:31,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d222804bc/bdfbba15600844f99eccd42ec9dd36d8 [2020-10-26 22:54:31,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:54:31,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:54:31,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:54:31,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:54:31,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:54:31,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:54:31" (1/1) ... [2020-10-26 22:54:31,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@305c2c7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:54:31, skipping insertion in model container [2020-10-26 22:54:31,953 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:54:31" (1/1) ... [2020-10-26 22:54:31,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:54:32,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:54:33,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:54:33,343 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:54:34,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:54:34,105 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:54:34,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:54:34 WrapperNode [2020-10-26 22:54:34,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:54:34,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:54:34,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:54:34,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:54:34,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:54:34" (1/1) ... [2020-10-26 22:54:34,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:54:34" (1/1) ... [2020-10-26 22:54:34,210 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:54:34" (1/1) ... [2020-10-26 22:54:34,210 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:54:34" (1/1) ... [2020-10-26 22:54:34,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:54:34" (1/1) ... [2020-10-26 22:54:34,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:54:34" (1/1) ... [2020-10-26 22:54:34,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:54:34" (1/1) ... [2020-10-26 22:54:34,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:54:34,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:54:34,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:54:34,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:54:34,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:54:34" (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 22:54:34,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:54:34,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:54:34,519 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:54:34,519 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:54:34,519 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 22:54:34,520 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 22:54:34,520 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 22:54:34,520 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:54:34,520 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:54:34,520 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 22:54:34,520 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 22:54:34,520 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 22:54:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:54:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:54:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:54:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:54:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:54:34,521 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:54:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:54:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:54:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:54:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:54:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:54:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:54:34,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:54:41,792 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:54:41,793 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:54:41,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:54:41 BoogieIcfgContainer [2020-10-26 22:54:41,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:54:41,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:54:41,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:54:41,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:54:41,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:54:31" (1/3) ... [2020-10-26 22:54:41,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56343c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:54:41, skipping insertion in model container [2020-10-26 22:54:41,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:54:34" (2/3) ... [2020-10-26 22:54:41,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56343c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:54:41, skipping insertion in model container [2020-10-26 22:54:41,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:54:41" (3/3) ... [2020-10-26 22:54:41,807 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label31.c [2020-10-26 22:54:41,820 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:54:41,827 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:54:41,842 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:54:41,882 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:54:41,882 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:54:41,882 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:54:41,882 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:54:41,882 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:54:41,883 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:54:41,883 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:54:41,883 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:54:41,924 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-26 22:54:41,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-26 22:54:41,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:54:41,937 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] [2020-10-26 22:54:41,937 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:54:41,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:54:41,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1227471988, now seen corresponding path program 1 times [2020-10-26 22:54:41,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:54:41,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776384251] [2020-10-26 22:54:41,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:54:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:42,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:42,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:42,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 22:54:42,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:42,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 761 [2020-10-26 22:54:42,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:42,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:54:42,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:54:42,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-26 22:54:42,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-26 22:54:43,210 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:54:43,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:54:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:43,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:43,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:43,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:54:43,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:54:43,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-26 22:54:43,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:43,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:54:43,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:54:43,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:54:43,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:54:43,297 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 22:54:43,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776384251] [2020-10-26 22:54:43,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:54:43,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 22:54:43,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249415958] [2020-10-26 22:54:43,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 22:54:43,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:54:43,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 22:54:43,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 22:54:43,328 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 4 states. [2020-10-26 22:54:43,500 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:54:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:54:58,032 INFO L93 Difference]: Finished difference Result 2476 states and 4742 transitions. [2020-10-26 22:54:58,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:54:58,035 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-26 22:54:58,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:54:58,068 INFO L225 Difference]: With dead ends: 2476 [2020-10-26 22:54:58,068 INFO L226 Difference]: Without dead ends: 1569 [2020-10-26 22:54:58,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:54:58,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-26 22:54:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-26 22:54:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-26 22:54:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2726 transitions. [2020-10-26 22:54:58,304 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2726 transitions. Word has length 70 [2020-10-26 22:54:58,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:54:58,305 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2726 transitions. [2020-10-26 22:54:58,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 22:54:58,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2726 transitions. [2020-10-26 22:54:58,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-26 22:54:58,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:54:58,313 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:54:58,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:54:58,313 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:54:58,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:54:58,315 INFO L82 PathProgramCache]: Analyzing trace with hash -116250914, now seen corresponding path program 1 times [2020-10-26 22:54:58,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:54:58,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125412423] [2020-10-26 22:54:58,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:54:58,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:54:58,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:58,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:59,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:54:59,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:54:59,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 151 [2020-10-26 22:54:59,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:54:59,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1451 [2020-10-26 22:54:59,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:54:59,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:54:59,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:54:59,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-26 22:54:59,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-26 22:55:00,050 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:55:00,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:55:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:00,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:00,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:00,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:55:00,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:00,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 22:55:00,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:00,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:55:00,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:00,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:55:00,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:00,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:55:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:00,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:00,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:00,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:00,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-26 22:55:00,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:55:00,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-26 22:55:00,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:00,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:55:00,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:55:00,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:55:00,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:00,532 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 58 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 22:55:00,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125412423] [2020-10-26 22:55:00,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:55:00,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:55:00,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279549769] [2020-10-26 22:55:00,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:55:00,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:55:00,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:55:00,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:55:00,543 INFO L87 Difference]: Start difference. First operand 1554 states and 2726 transitions. Second operand 7 states. [2020-10-26 22:55:00,718 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:55:18,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:55:18,200 INFO L93 Difference]: Finished difference Result 4686 states and 8280 transitions. [2020-10-26 22:55:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 22:55:18,201 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 139 [2020-10-26 22:55:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:55:18,223 INFO L225 Difference]: With dead ends: 4686 [2020-10-26 22:55:18,224 INFO L226 Difference]: Without dead ends: 3138 [2020-10-26 22:55:18,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:55:18,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3138 states. [2020-10-26 22:55:18,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3138 to 3115. [2020-10-26 22:55:18,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3115 states. [2020-10-26 22:55:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3115 states to 3115 states and 5329 transitions. [2020-10-26 22:55:18,339 INFO L78 Accepts]: Start accepts. Automaton has 3115 states and 5329 transitions. Word has length 139 [2020-10-26 22:55:18,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:55:18,340 INFO L481 AbstractCegarLoop]: Abstraction has 3115 states and 5329 transitions. [2020-10-26 22:55:18,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:55:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3115 states and 5329 transitions. [2020-10-26 22:55:18,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-26 22:55:18,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:55:18,345 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, 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 22:55:18,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:55:18,346 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:55:18,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:55:18,347 INFO L82 PathProgramCache]: Analyzing trace with hash 585835282, now seen corresponding path program 1 times [2020-10-26 22:55:18,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:55:18,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938968431] [2020-10-26 22:55:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:55:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:18,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:18,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:18,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:19,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:19,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-26 22:55:19,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:55:19,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1129 [2020-10-26 22:55:19,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:19,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 22:55:19,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:55:19,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-26 22:55:19,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:55:19,718 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:55:19,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:55:19,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:19,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:19,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:19,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:55:19,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:19,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 22:55:19,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:19,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:55:19,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:19,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:55:19,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:19,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:55:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:19,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:19,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:20,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:55:20,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:20,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-26 22:55:20,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:20,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:55:20,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:55:20,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 22:55:20,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:55:20,130 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-26 22:55:20,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938968431] [2020-10-26 22:55:20,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:55:20,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:55:20,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339934749] [2020-10-26 22:55:20,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:55:20,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:55:20,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:55:20,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:55:20,136 INFO L87 Difference]: Start difference. First operand 3115 states and 5329 transitions. Second operand 6 states. [2020-10-26 22:55:20,300 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-26 22:55:37,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:55:37,492 INFO L93 Difference]: Finished difference Result 9409 states and 16273 transitions. [2020-10-26 22:55:37,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:55:37,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 145 [2020-10-26 22:55:37,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:55:37,540 INFO L225 Difference]: With dead ends: 9409 [2020-10-26 22:55:37,540 INFO L226 Difference]: Without dead ends: 6300 [2020-10-26 22:55:37,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:55:37,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6300 states. [2020-10-26 22:55:37,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6300 to 6269. [2020-10-26 22:55:37,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6269 states. [2020-10-26 22:55:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6269 states to 6269 states and 9337 transitions. [2020-10-26 22:55:37,789 INFO L78 Accepts]: Start accepts. Automaton has 6269 states and 9337 transitions. Word has length 145 [2020-10-26 22:55:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:55:37,790 INFO L481 AbstractCegarLoop]: Abstraction has 6269 states and 9337 transitions. [2020-10-26 22:55:37,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:55:37,790 INFO L276 IsEmpty]: Start isEmpty. Operand 6269 states and 9337 transitions. [2020-10-26 22:55:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-26 22:55:37,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:55:37,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:37,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:55:37,795 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:55:37,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:55:37,796 INFO L82 PathProgramCache]: Analyzing trace with hash 639802558, now seen corresponding path program 1 times [2020-10-26 22:55:37,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:55:37,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460530901] [2020-10-26 22:55:37,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:55:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:37,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:38,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:38,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:38,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 22:55:38,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:55:38,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-10-26 22:55:38,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:38,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:55:38,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:55:38,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 22:55:38,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:55:38,909 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:55:38,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:55:38,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:38,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:38,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:38,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:55:38,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:38,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 22:55:38,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:38,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:55:38,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:55:38,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:55:38,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:38,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:55:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:55:39,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:55:39,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:55:39,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 22:55:39,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:55:39,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-26 22:55:39,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:55:39,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:55:39,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:55:39,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-26 22:55:39,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:55:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:55:39,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460530901] [2020-10-26 22:55:39,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:55:39,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:55:39,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380810143] [2020-10-26 22:55:39,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:55:39,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:55:39,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:55:39,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:55:39,349 INFO L87 Difference]: Start difference. First operand 6269 states and 9337 transitions. Second operand 7 states. [2020-10-26 22:55:39,518 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:55:42,873 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:56:00,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:56:00,414 INFO L93 Difference]: Finished difference Result 17453 states and 26830 transitions. [2020-10-26 22:56:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:56:00,417 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 155 [2020-10-26 22:56:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:56:00,500 INFO L225 Difference]: With dead ends: 17453 [2020-10-26 22:56:00,501 INFO L226 Difference]: Without dead ends: 11190 [2020-10-26 22:56:00,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:56:00,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2020-10-26 22:56:00,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 11040. [2020-10-26 22:56:00,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11040 states. [2020-10-26 22:56:00,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11040 states to 11040 states and 15852 transitions. [2020-10-26 22:56:00,972 INFO L78 Accepts]: Start accepts. Automaton has 11040 states and 15852 transitions. Word has length 155 [2020-10-26 22:56:00,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:56:00,975 INFO L481 AbstractCegarLoop]: Abstraction has 11040 states and 15852 transitions. [2020-10-26 22:56:00,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:56:00,975 INFO L276 IsEmpty]: Start isEmpty. Operand 11040 states and 15852 transitions. [2020-10-26 22:56:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-26 22:56:00,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:00,979 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:00,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:56:00,980 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:00,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1730444724, now seen corresponding path program 1 times [2020-10-26 22:56:00,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:00,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410131777] [2020-10-26 22:56:00,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:01,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:01,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:02,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:02,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:02,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-26 22:56:02,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:56:02,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1671 [2020-10-26 22:56:02,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:56:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:56:02,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-26 22:56:02,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:02,897 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:56:02,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:02,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:02,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:02,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:02,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:02,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-26 22:56:02,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:02,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:02,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:02,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:56:02,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:02,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:56:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:03,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:03,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:03,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 22:56:03,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:03,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-26 22:56:03,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:56:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:56:03,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 22:56:03,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:56:03,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410131777] [2020-10-26 22:56:03,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:56:03,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:56:03,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88504095] [2020-10-26 22:56:03,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:56:03,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:03,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:56:03,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:56:03,484 INFO L87 Difference]: Start difference. First operand 11040 states and 15852 transitions. Second operand 7 states. [2020-10-26 22:56:03,740 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:56:06,903 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-26 22:56:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:56:26,961 INFO L93 Difference]: Finished difference Result 27876 states and 40648 transitions. [2020-10-26 22:56:26,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:56:26,963 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 170 [2020-10-26 22:56:26,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:56:27,039 INFO L225 Difference]: With dead ends: 27876 [2020-10-26 22:56:27,039 INFO L226 Difference]: Without dead ends: 16842 [2020-10-26 22:56:27,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-26 22:56:27,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16842 states. [2020-10-26 22:56:27,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16842 to 15926. [2020-10-26 22:56:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15926 states. [2020-10-26 22:56:27,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15926 states to 15926 states and 21480 transitions. [2020-10-26 22:56:27,564 INFO L78 Accepts]: Start accepts. Automaton has 15926 states and 21480 transitions. Word has length 170 [2020-10-26 22:56:27,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:56:27,564 INFO L481 AbstractCegarLoop]: Abstraction has 15926 states and 21480 transitions. [2020-10-26 22:56:27,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:56:27,564 INFO L276 IsEmpty]: Start isEmpty. Operand 15926 states and 21480 transitions. [2020-10-26 22:56:27,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-26 22:56:27,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:27,570 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:27,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:56:27,570 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:27,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:27,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1395294698, now seen corresponding path program 1 times [2020-10-26 22:56:27,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:27,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336690061] [2020-10-26 22:56:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:27,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:27,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:27,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:27,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:28,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:29,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:29,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-26 22:56:29,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:56:29,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2279 [2020-10-26 22:56:29,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:29,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:56:29,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:56:29,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 22:56:29,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:30,139 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:56:30,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:30,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:30,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:30,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:30,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:30,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 22:56:30,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:30,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:56:30,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:30,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:56:30,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:30,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:56:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:30,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:30,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:30,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:56:30,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:30,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-26 22:56:30,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:30,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:30,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:56:30,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:30,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 22:56:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:30,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:30,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:30,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:30,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 22:56:30,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:56:30,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 347 [2020-10-26 22:56:30,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:56:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:56:30,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-26 22:56:30,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:56:31,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336690061] [2020-10-26 22:56:31,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:56:31,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:56:31,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115933183] [2020-10-26 22:56:31,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:56:31,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:31,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:56:31,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:56:31,152 INFO L87 Difference]: Start difference. First operand 15926 states and 21480 transitions. Second operand 6 states. [2020-10-26 22:56:31,654 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-26 22:56:32,271 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-26 22:56:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:56:45,704 INFO L93 Difference]: Finished difference Result 25085 states and 34907 transitions. [2020-10-26 22:56:45,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:56:45,707 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 245 [2020-10-26 22:56:45,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:56:45,739 INFO L225 Difference]: With dead ends: 25085 [2020-10-26 22:56:45,740 INFO L226 Difference]: Without dead ends: 9732 [2020-10-26 22:56:45,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-26 22:56:45,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9732 states. [2020-10-26 22:56:45,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9732 to 9517. [2020-10-26 22:56:45,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9517 states. [2020-10-26 22:56:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9517 states to 9517 states and 12719 transitions. [2020-10-26 22:56:46,005 INFO L78 Accepts]: Start accepts. Automaton has 9517 states and 12719 transitions. Word has length 245 [2020-10-26 22:56:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:56:46,005 INFO L481 AbstractCegarLoop]: Abstraction has 9517 states and 12719 transitions. [2020-10-26 22:56:46,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:56:46,005 INFO L276 IsEmpty]: Start isEmpty. Operand 9517 states and 12719 transitions. [2020-10-26 22:56:46,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-26 22:56:46,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:46,013 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:56:46,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:56:46,013 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:46,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1121051822, now seen corresponding path program 1 times [2020-10-26 22:56:46,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:46,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122955045] [2020-10-26 22:56:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:46,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:46,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:46,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:47,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:48,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:51,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:51,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-26 22:56:51,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:56:51,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-26 22:56:51,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:51,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:56:51,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:56:51,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-26 22:56:51,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:51,332 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:56:51,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:51,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:51,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:51,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:51,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:51,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-26 22:56:51,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:51,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:51,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:51,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:56:51,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:51,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:56:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:51,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:51,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:51,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 22:56:51,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:51,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 315 [2020-10-26 22:56:51,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:51,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:56:51,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:56:51,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 22:56:51,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:52,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-10-26 22:56:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:52,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:52,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:52,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 22:56:52,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:52,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-26 22:56:52,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:52,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:56:52,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-26 22:56:52,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:56:52,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 124 proven. 92 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:56:52,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122955045] [2020-10-26 22:56:52,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:56:52,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:56:52,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670526231] [2020-10-26 22:56:52,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:56:52,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:52,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:56:52,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:56:52,425 INFO L87 Difference]: Start difference. First operand 9517 states and 12719 transitions. Second operand 7 states. [2020-10-26 22:56:52,622 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-26 22:56:57,967 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-26 22:57:15,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:57:15,953 INFO L93 Difference]: Finished difference Result 24928 states and 35026 transitions. [2020-10-26 22:57:15,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 22:57:15,955 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 315 [2020-10-26 22:57:15,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:57:16,003 INFO L225 Difference]: With dead ends: 24928 [2020-10-26 22:57:16,003 INFO L226 Difference]: Without dead ends: 16184 [2020-10-26 22:57:16,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-26 22:57:16,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2020-10-26 22:57:16,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 15169. [2020-10-26 22:57:16,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15169 states. [2020-10-26 22:57:16,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15169 states to 15169 states and 19132 transitions. [2020-10-26 22:57:16,398 INFO L78 Accepts]: Start accepts. Automaton has 15169 states and 19132 transitions. Word has length 315 [2020-10-26 22:57:16,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:57:16,399 INFO L481 AbstractCegarLoop]: Abstraction has 15169 states and 19132 transitions. [2020-10-26 22:57:16,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:57:16,399 INFO L276 IsEmpty]: Start isEmpty. Operand 15169 states and 19132 transitions. [2020-10-26 22:57:16,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-10-26 22:57:16,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:57:16,412 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:16,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:57:16,412 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:57:16,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:57:16,413 INFO L82 PathProgramCache]: Analyzing trace with hash -929425546, now seen corresponding path program 1 times [2020-10-26 22:57:16,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:57:16,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259934279] [2020-10-26 22:57:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:57:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:16,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:16,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:18,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:18,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:19,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:21,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:21,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 417 [2020-10-26 22:57:21,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:57:21,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 22:57:21,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:21,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:57:21,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 22:57:21,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 191 [2020-10-26 22:57:21,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:21,762 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:57:21,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:57:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:21,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:21,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:21,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:57:21,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:21,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 22:57:21,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:21,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:57:21,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:21,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:57:21,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:21,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:57:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:21,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:21,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:21,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:57:21,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:21,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-26 22:57:21,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:21,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:57:21,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:21,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:57:21,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:22,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:57:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:22,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:22,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:22,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:57:22,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:22,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-26 22:57:22,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:22,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:22,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:22,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:57:22,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:22,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-10-26 22:57:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:22,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:22,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:22,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 22:57:22,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:22,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-26 22:57:22,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:22,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:22,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:22,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 22:57:22,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 22:57:22,754 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 366 proven. 6 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-26 22:57:22,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259934279] [2020-10-26 22:57:22,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:57:22,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:57:22,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684510017] [2020-10-26 22:57:22,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:57:22,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:57:22,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:57:22,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:57:22,758 INFO L87 Difference]: Start difference. First operand 15169 states and 19132 transitions. Second operand 7 states. [2020-10-26 22:57:22,948 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:57:42,331 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:57:48,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:57:48,268 INFO L93 Difference]: Finished difference Result 38937 states and 52925 transitions. [2020-10-26 22:57:48,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 22:57:48,270 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 401 [2020-10-26 22:57:48,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:57:48,347 INFO L225 Difference]: With dead ends: 38937 [2020-10-26 22:57:48,347 INFO L226 Difference]: Without dead ends: 24541 [2020-10-26 22:57:48,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:57:48,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24541 states. [2020-10-26 22:57:48,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24541 to 23433. [2020-10-26 22:57:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23433 states. [2020-10-26 22:57:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23433 states to 23433 states and 30702 transitions. [2020-10-26 22:57:48,900 INFO L78 Accepts]: Start accepts. Automaton has 23433 states and 30702 transitions. Word has length 401 [2020-10-26 22:57:48,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:57:48,901 INFO L481 AbstractCegarLoop]: Abstraction has 23433 states and 30702 transitions. [2020-10-26 22:57:48,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:57:48,901 INFO L276 IsEmpty]: Start isEmpty. Operand 23433 states and 30702 transitions. [2020-10-26 22:57:48,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2020-10-26 22:57:48,914 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:57:48,915 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:57:48,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:57:48,915 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:57:48,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:57:48,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1570885906, now seen corresponding path program 1 times [2020-10-26 22:57:48,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:57:48,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077930456] [2020-10-26 22:57:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:57:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:49,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:49,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:50,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:51,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:52,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:54,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:54,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 421 [2020-10-26 22:57:54,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 22:57:54,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 22:57:54,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:54,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:57:54,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:57:54,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 191 [2020-10-26 22:57:54,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:54,283 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-26 22:57:54,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:57:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:54,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:54,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:54,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:57:54,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:54,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:57:54,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:54,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:57:54,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:54,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:57:54,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:57:54,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:57:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:54,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:54,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:54,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:57:54,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:54,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-26 22:57:54,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:54,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:57:54,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:54,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:57:54,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:54,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:57:54,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:54,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:54,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:54,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:54,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-26 22:57:54,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:57:54,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-26 22:57:54,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:54,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:54,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:54,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 22:57:54,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:54,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-10-26 22:57:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:54,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:55,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:55,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 22:57:55,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:55,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-26 22:57:55,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:55,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:55,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:55,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 22:57:55,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 448 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 22:57:55,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077930456] [2020-10-26 22:57:55,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:57:55,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:57:55,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73223636] [2020-10-26 22:57:55,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:57:55,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:57:55,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:57:55,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:57:55,254 INFO L87 Difference]: Start difference. First operand 23433 states and 30702 transitions. Second operand 8 states. [2020-10-26 22:57:56,993 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-26 22:58:05,701 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 69