/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem13_label26.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 17:59:08,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 17:59:08,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 17:59:08,943 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 17:59:08,943 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 17:59:08,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 17:59:08,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 17:59:08,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 17:59:08,951 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 17:59:08,952 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 17:59:08,954 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 17:59:08,955 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 17:59:08,956 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 17:59:08,957 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 17:59:08,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 17:59:08,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 17:59:08,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 17:59:08,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 17:59:08,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 17:59:08,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 17:59:08,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 17:59:08,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 17:59:08,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 17:59:08,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 17:59:08,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 17:59:08,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 17:59:08,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 17:59:08,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 17:59:08,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 17:59:08,995 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 17:59:08,995 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 17:59:08,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 17:59:08,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 17:59:08,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 17:59:08,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 17:59:09,000 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 17:59:09,001 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 17:59:09,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 17:59:09,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 17:59:09,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 17:59:09,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 17:59:09,004 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 17:59:09,044 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 17:59:09,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 17:59:09,047 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 17:59:09,047 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 17:59:09,048 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 17:59:09,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 17:59:09,049 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 17:59:09,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 17:59:09,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 17:59:09,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 17:59:09,052 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 17:59:09,052 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 17:59:09,053 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 17:59:09,053 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 17:59:09,053 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 17:59:09,054 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 17:59:09,054 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 17:59:09,054 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 17:59:09,054 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 17:59:09,055 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 17:59:09,055 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 17:59:09,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 17:59:09,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 17:59:09,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 17:59:09,056 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 17:59:09,057 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 17:59:09,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 17:59:09,057 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 17:59:09,057 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 17:59:09,058 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 17:59:09,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 17:59:09,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 17:59:09,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 17:59:09,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 17:59:09,517 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 17:59:09,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label26.c [2020-10-27 17:59:09,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77dbb664d/3767e0fcdc13467a81e4804ead02c5f6/FLAG72ef3a772 [2020-10-27 17:59:10,637 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 17:59:10,638 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem13_label26.c [2020-10-27 17:59:10,686 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77dbb664d/3767e0fcdc13467a81e4804ead02c5f6/FLAG72ef3a772 [2020-10-27 17:59:11,039 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/77dbb664d/3767e0fcdc13467a81e4804ead02c5f6 [2020-10-27 17:59:11,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 17:59:11,052 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 17:59:11,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 17:59:11,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 17:59:11,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 17:59:11,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:59:11" (1/1) ... [2020-10-27 17:59:11,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@135fff50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:59:11, skipping insertion in model container [2020-10-27 17:59:11,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:59:11" (1/1) ... [2020-10-27 17:59:11,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 17:59:11,264 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 17:59:12,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:59:13,014 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 17:59:13,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 17:59:13,900 INFO L208 MainTranslator]: Completed translation [2020-10-27 17:59:13,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:59:13 WrapperNode [2020-10-27 17:59:13,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 17:59:13,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 17:59:13,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 17:59:13,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 17:59:13,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:59:13" (1/1) ... [2020-10-27 17:59:13,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:59:13" (1/1) ... [2020-10-27 17:59:14,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:59:13" (1/1) ... [2020-10-27 17:59:14,010 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:59:13" (1/1) ... [2020-10-27 17:59:14,237 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:59:13" (1/1) ... [2020-10-27 17:59:14,289 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:59:13" (1/1) ... [2020-10-27 17:59:14,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:59:13" (1/1) ... [2020-10-27 17:59:14,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 17:59:14,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 17:59:14,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 17:59:14,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 17:59:14,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:59:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 17:59:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 17:59:14,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 17:59:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 17:59:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 17:59:14,564 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 17:59:14,565 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 17:59:14,565 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 17:59:14,565 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 17:59:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 17:59:14,565 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 17:59:14,566 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 17:59:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 17:59:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 17:59:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 17:59:14,567 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 17:59:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 17:59:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 17:59:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 17:59:14,568 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 17:59:14,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 17:59:14,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 17:59:14,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 17:59:14,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 17:59:14,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 17:59:14,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 17:59:24,432 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 17:59:24,433 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 17:59:24,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:59:24 BoogieIcfgContainer [2020-10-27 17:59:24,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 17:59:24,445 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 17:59:24,445 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 17:59:24,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 17:59:24,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:59:11" (1/3) ... [2020-10-27 17:59:24,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c069e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:59:24, skipping insertion in model container [2020-10-27 17:59:24,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:59:13" (2/3) ... [2020-10-27 17:59:24,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c069e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:59:24, skipping insertion in model container [2020-10-27 17:59:24,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:59:24" (3/3) ... [2020-10-27 17:59:24,454 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label26.c [2020-10-27 17:59:24,467 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 17:59:24,475 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 17:59:24,490 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 17:59:24,536 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 17:59:24,536 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 17:59:24,536 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 17:59:24,537 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 17:59:24,537 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 17:59:24,537 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 17:59:24,537 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 17:59:24,537 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 17:59:24,587 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states. [2020-10-27 17:59:24,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 17:59:24,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:59:24,597 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] [2020-10-27 17:59:24,598 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:59:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:59:24,607 INFO L82 PathProgramCache]: Analyzing trace with hash 2087975178, now seen corresponding path program 1 times [2020-10-27 17:59:24,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:59:24,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283821257] [2020-10-27 17:59:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:59:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:59:24,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:25,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:59:25,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 17:59:25,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:59:25,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 627 [2020-10-27 17:59:25,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:59:25,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 17:59:25,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 17:59:25,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 17:59:25,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:59:25,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:59:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:59:25,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:25,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:59:25,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:59:25,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:59:25,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 17:59:25,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:59:25,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:59:25,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:59:25,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 17:59:25,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:59:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:59:25,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283821257] [2020-10-27 17:59:25,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 17:59:25,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 17:59:25,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189732670] [2020-10-27 17:59:25,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 17:59:25,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:59:25,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 17:59:25,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 17:59:25,766 INFO L87 Difference]: Start difference. First operand 1123 states. Second operand 4 states. [2020-10-27 17:59:42,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 17:59:42,723 INFO L93 Difference]: Finished difference Result 3123 states and 5754 transitions. [2020-10-27 17:59:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 17:59:42,726 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-27 17:59:42,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 17:59:42,768 INFO L225 Difference]: With dead ends: 3123 [2020-10-27 17:59:42,769 INFO L226 Difference]: Without dead ends: 1936 [2020-10-27 17:59:42,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:59:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2020-10-27 17:59:42,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1918. [2020-10-27 17:59:42,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-10-27 17:59:42,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2936 transitions. [2020-10-27 17:59:42,959 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2936 transitions. Word has length 45 [2020-10-27 17:59:42,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 17:59:42,960 INFO L481 AbstractCegarLoop]: Abstraction has 1918 states and 2936 transitions. [2020-10-27 17:59:42,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 17:59:42,960 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2936 transitions. [2020-10-27 17:59:42,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 17:59:42,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 17:59:42,966 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 17:59:42,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 17:59:42,967 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 17:59:42,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 17:59:42,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2048771536, now seen corresponding path program 1 times [2020-10-27 17:59:42,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 17:59:42,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220421374] [2020-10-27 17:59:42,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 17:59:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:59:43,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:43,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:44,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:59:44,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 17:59:44,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 17:59:44,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1133 [2020-10-27 17:59:44,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:59:44,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 17:59:44,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 17:59:44,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 17:59:44,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 17:59:44,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 17:59:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:59:44,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:44,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:59:44,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 17:59:44,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:59:44,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 17:59:44,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:59:44,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 17:59:44,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:59:44,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 17:59:44,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 17:59:44,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 17:59:44,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 17:59:44,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 17:59:44,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 17:59:44,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 17:59:44,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 17:59:44,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-27 17:59:44,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 17:59:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 17:59:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 17:59:44,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 17:59:44,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 17:59:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 17:59:44,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220421374] [2020-10-27 17:59:44,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 17:59:44,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 17:59:44,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155634442] [2020-10-27 17:59:44,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 17:59:44,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 17:59:44,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 17:59:44,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 17:59:44,607 INFO L87 Difference]: Start difference. First operand 1918 states and 2936 transitions. Second operand 5 states. [2020-10-27 18:00:03,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:00:03,454 INFO L93 Difference]: Finished difference Result 4686 states and 7486 transitions. [2020-10-27 18:00:03,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:00:03,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 121 [2020-10-27 18:00:03,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:00:03,471 INFO L225 Difference]: With dead ends: 4686 [2020-10-27 18:00:03,471 INFO L226 Difference]: Without dead ends: 2774 [2020-10-27 18:00:03,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:00:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2774 states. [2020-10-27 18:00:03,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2774 to 2766. [2020-10-27 18:00:03,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2766 states. [2020-10-27 18:00:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 3980 transitions. [2020-10-27 18:00:03,561 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 3980 transitions. Word has length 121 [2020-10-27 18:00:03,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:00:03,562 INFO L481 AbstractCegarLoop]: Abstraction has 2766 states and 3980 transitions. [2020-10-27 18:00:03,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:00:03,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 3980 transitions. [2020-10-27 18:00:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 18:00:03,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:00:03,565 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:00:03,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:00:03,566 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:00:03,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:00:03,566 INFO L82 PathProgramCache]: Analyzing trace with hash 2141850163, now seen corresponding path program 1 times [2020-10-27 18:00:03,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:00:03,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156618516] [2020-10-27 18:00:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:00:03,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:03,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:03,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:04,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:04,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 18:00:04,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:00:04,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-27 18:00:04,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:04,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:00:04,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-27 18:00:04,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 18:00:04,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:04,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:00:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:04,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:04,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:04,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:00:04,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:04,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:00:04,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:04,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:00:04,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:04,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:00:04,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:05,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:00:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:05,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:05,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:05,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 18:00:05,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:05,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-27 18:00:05,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:05,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:00:05,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:05,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 18:00:05,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:00:05,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156618516] [2020-10-27 18:00:05,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:00:05,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:00:05,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112543859] [2020-10-27 18:00:05,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:00:05,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:00:05,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:00:05,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:00:05,206 INFO L87 Difference]: Start difference. First operand 2766 states and 3980 transitions. Second operand 5 states. [2020-10-27 18:00:21,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:00:21,825 INFO L93 Difference]: Finished difference Result 8096 states and 11829 transitions. [2020-10-27 18:00:21,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:00:21,827 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-10-27 18:00:21,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:00:21,853 INFO L225 Difference]: With dead ends: 8096 [2020-10-27 18:00:21,853 INFO L226 Difference]: Without dead ends: 5336 [2020-10-27 18:00:21,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:00:21,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2020-10-27 18:00:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 5260. [2020-10-27 18:00:22,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5260 states. [2020-10-27 18:00:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5260 states to 5260 states and 7402 transitions. [2020-10-27 18:00:22,023 INFO L78 Accepts]: Start accepts. Automaton has 5260 states and 7402 transitions. Word has length 135 [2020-10-27 18:00:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:00:22,026 INFO L481 AbstractCegarLoop]: Abstraction has 5260 states and 7402 transitions. [2020-10-27 18:00:22,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:00:22,026 INFO L276 IsEmpty]: Start isEmpty. Operand 5260 states and 7402 transitions. [2020-10-27 18:00:22,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 18:00:22,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:00:22,036 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:00:22,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:00:22,037 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:00:22,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:00:22,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1939873266, now seen corresponding path program 1 times [2020-10-27 18:00:22,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:00:22,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652009260] [2020-10-27 18:00:22,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:00:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:22,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:22,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:22,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:22,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 18:00:22,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:00:22,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-27 18:00:22,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:22,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:00:22,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-27 18:00:22,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:00:22,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:22,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:00:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:22,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:22,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:22,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:00:22,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:22,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 18:00:22,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:22,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:00:22,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:22,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:00:22,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:22,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:00:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:23,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:23,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:23,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 18:00:23,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:23,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 18:00:23,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:23,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:00:23,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:23,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-27 18:00:23,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:00:23,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652009260] [2020-10-27 18:00:23,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:00:23,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:00:23,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857616174] [2020-10-27 18:00:23,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:00:23,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:00:23,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:00:23,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:00:23,177 INFO L87 Difference]: Start difference. First operand 5260 states and 7402 transitions. Second operand 5 states. [2020-10-27 18:00:42,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:00:42,603 INFO L93 Difference]: Finished difference Result 15421 states and 22115 transitions. [2020-10-27 18:00:42,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:00:42,605 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2020-10-27 18:00:42,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:00:42,668 INFO L225 Difference]: With dead ends: 15421 [2020-10-27 18:00:42,668 INFO L226 Difference]: Without dead ends: 10167 [2020-10-27 18:00:42,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:00:42,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10167 states. [2020-10-27 18:00:42,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10167 to 10162. [2020-10-27 18:00:42,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10162 states. [2020-10-27 18:00:42,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10162 states to 10162 states and 14087 transitions. [2020-10-27 18:00:42,986 INFO L78 Accepts]: Start accepts. Automaton has 10162 states and 14087 transitions. Word has length 145 [2020-10-27 18:00:42,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:00:42,987 INFO L481 AbstractCegarLoop]: Abstraction has 10162 states and 14087 transitions. [2020-10-27 18:00:42,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:00:42,988 INFO L276 IsEmpty]: Start isEmpty. Operand 10162 states and 14087 transitions. [2020-10-27 18:00:42,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 18:00:42,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:00:42,992 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:00:42,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:00:42,992 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:00:42,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:00:42,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1102154123, now seen corresponding path program 1 times [2020-10-27 18:00:42,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:00:42,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61070863] [2020-10-27 18:00:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:00:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:43,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:43,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:44,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:44,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 18:00:44,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:00:44,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1378 [2020-10-27 18:00:44,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:44,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:00:44,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-27 18:00:44,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:00:44,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:44,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:00:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:44,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:44,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:44,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:00:44,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:44,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 18:00:44,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:00:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:00:44,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:44,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:00:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:00:44,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:00:44,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:00:44,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 18:00:44,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:00:44,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-27 18:00:44,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:00:44,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:00:44,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:00:44,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 18:00:44,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:00:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:00:44,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61070863] [2020-10-27 18:00:44,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:00:44,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:00:44,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055327355] [2020-10-27 18:00:44,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:00:44,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:00:44,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:00:44,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:00:44,894 INFO L87 Difference]: Start difference. First operand 10162 states and 14087 transitions. Second operand 5 states. [2020-10-27 18:01:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:01:04,484 INFO L93 Difference]: Finished difference Result 30072 states and 43039 transitions. [2020-10-27 18:01:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:01:04,486 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2020-10-27 18:01:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:01:04,600 INFO L225 Difference]: With dead ends: 30072 [2020-10-27 18:01:04,600 INFO L226 Difference]: Without dead ends: 19916 [2020-10-27 18:01:04,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:01:04,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19916 states. [2020-10-27 18:01:05,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19916 to 19911. [2020-10-27 18:01:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19911 states. [2020-10-27 18:01:05,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19911 states to 19911 states and 26833 transitions. [2020-10-27 18:01:05,160 INFO L78 Accepts]: Start accepts. Automaton has 19911 states and 26833 transitions. Word has length 154 [2020-10-27 18:01:05,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:01:05,162 INFO L481 AbstractCegarLoop]: Abstraction has 19911 states and 26833 transitions. [2020-10-27 18:01:05,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:01:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 19911 states and 26833 transitions. [2020-10-27 18:01:05,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-27 18:01:05,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:01:05,169 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, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 18:01:05,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:01:05,170 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:01:05,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:01:05,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1474297921, now seen corresponding path program 1 times [2020-10-27 18:01:05,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:01:05,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207692771] [2020-10-27 18:01:05,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:01:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:05,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:05,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:05,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:07,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:09,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:01:09,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-27 18:01:09,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 18:01:09,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3884 [2020-10-27 18:01:09,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:01:09,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:01:09,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 181 [2020-10-27 18:01:09,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 18:01:09,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:01:09,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:01:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:09,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:09,306 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:01:09,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:01:09,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:01:09,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:01:09,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:01:09,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:01:09,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:01:09,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:01:09,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:01:09,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:01:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:09,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:09,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:01:09,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 18:01:09,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:01:09,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 18:01:09,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:01:09,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:01:09,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:01:09,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:01:09,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:01:09,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-27 18:01:09,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:09,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:09,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:01:09,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 18:01:09,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:01:09,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-27 18:01:09,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:01:09,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:01:09,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:01:09,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 18:01:09,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:01:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-27 18:01:09,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207692771] [2020-10-27 18:01:09,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:01:09,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:01:09,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235926723] [2020-10-27 18:01:09,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:01:09,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:01:09,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:01:09,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:01:09,668 INFO L87 Difference]: Start difference. First operand 19911 states and 26833 transitions. Second operand 5 states. [2020-10-27 18:01:10,972 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-27 18:01:22,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:01:22,866 INFO L93 Difference]: Finished difference Result 39854 states and 53785 transitions. [2020-10-27 18:01:22,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:01:22,869 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2020-10-27 18:01:22,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:01:22,952 INFO L225 Difference]: With dead ends: 39854 [2020-10-27 18:01:22,952 INFO L226 Difference]: Without dead ends: 19915 [2020-10-27 18:01:22,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:01:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19915 states. [2020-10-27 18:01:23,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19915 to 19911. [2020-10-27 18:01:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19911 states. [2020-10-27 18:01:23,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19911 states to 19911 states and 26825 transitions. [2020-10-27 18:01:23,534 INFO L78 Accepts]: Start accepts. Automaton has 19911 states and 26825 transitions. Word has length 214 [2020-10-27 18:01:23,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:01:23,535 INFO L481 AbstractCegarLoop]: Abstraction has 19911 states and 26825 transitions. [2020-10-27 18:01:23,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:01:23,535 INFO L276 IsEmpty]: Start isEmpty. Operand 19911 states and 26825 transitions. [2020-10-27 18:01:23,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-10-27 18:01:23,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:01:23,551 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:01:23,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:01:23,551 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:01:23,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:01:23,553 INFO L82 PathProgramCache]: Analyzing trace with hash 1713724445, now seen corresponding path program 1 times [2020-10-27 18:01:23,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:01:23,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464881960] [2020-10-27 18:01:23,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:01:23,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:23,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:23,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:24,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:27,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:01:27,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-27 18:01:27,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:01:27,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3554 [2020-10-27 18:01:27,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:01:27,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:01:27,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 264 [2020-10-27 18:01:27,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 18:01:27,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:01:27,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:01:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:27,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:27,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:01:27,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:01:27,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:01:27,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 18:01:27,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:01:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:01:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:01:27,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:01:27,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:01:27,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:01:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:27,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:27,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:01:27,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 18:01:27,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:01:27,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 18:01:27,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:01:27,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:01:27,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:01:27,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:01:27,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:01:27,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-27 18:01:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:27,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:27,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:01:27,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 18:01:27,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:01:27,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-27 18:01:27,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:01:27,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:01:27,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:01:27,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-27 18:01:27,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:01:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2020-10-27 18:01:27,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464881960] [2020-10-27 18:01:27,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:01:27,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:01:27,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18885793] [2020-10-27 18:01:27,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:01:27,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:01:27,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:01:27,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:01:27,813 INFO L87 Difference]: Start difference. First operand 19911 states and 26825 transitions. Second operand 5 states. [2020-10-27 18:01:54,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:01:54,674 INFO L93 Difference]: Finished difference Result 58497 states and 82123 transitions. [2020-10-27 18:01:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:01:54,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 297 [2020-10-27 18:01:54,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:01:54,867 INFO L225 Difference]: With dead ends: 58497 [2020-10-27 18:01:54,867 INFO L226 Difference]: Without dead ends: 38592 [2020-10-27 18:01:54,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:01:54,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38592 states. [2020-10-27 18:01:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38592 to 38586. [2020-10-27 18:01:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38586 states. [2020-10-27 18:01:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38586 states to 38586 states and 51250 transitions. [2020-10-27 18:01:56,282 INFO L78 Accepts]: Start accepts. Automaton has 38586 states and 51250 transitions. Word has length 297 [2020-10-27 18:01:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:01:56,286 INFO L481 AbstractCegarLoop]: Abstraction has 38586 states and 51250 transitions. [2020-10-27 18:01:56,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:01:56,286 INFO L276 IsEmpty]: Start isEmpty. Operand 38586 states and 51250 transitions. [2020-10-27 18:01:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-27 18:01:56,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:01:56,325 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:01:56,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:01:56,325 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:01:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:01:56,326 INFO L82 PathProgramCache]: Analyzing trace with hash 292296233, now seen corresponding path program 1 times [2020-10-27 18:01:56,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:01:56,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113438188] [2020-10-27 18:01:56,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:01:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:01:56,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:56,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:56,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:58,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:01:59,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:01,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:01,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-27 18:02:01,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 18:02:01,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 18:02:01,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:01,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:02:01,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 269 [2020-10-27 18:02:01,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 18:02:01,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:01,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:02:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:01,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:01,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:01,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:02:01,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:01,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:02:01,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:02:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:01,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:02:01,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:01,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:02:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:01,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:01,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:01,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 18:02:01,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:01,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 18:02:01,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:01,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:02:01,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:01,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:02:01,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:01,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-27 18:02:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:01,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:01,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:01,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:01,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 18:02:01,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:02:01,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-27 18:02:01,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:01,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:02:01,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-10-27 18:02:01,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:02:01,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 75 proven. 2 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-27 18:02:02,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113438188] [2020-10-27 18:02:02,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:02:02,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:02:02,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094097833] [2020-10-27 18:02:02,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:02:02,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:02:02,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:02:02,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:02:02,154 INFO L87 Difference]: Start difference. First operand 38586 states and 51250 transitions. Second operand 6 states. [2020-10-27 18:02:03,378 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 18:02:37,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:02:37,728 INFO L93 Difference]: Finished difference Result 102363 states and 147758 transitions. [2020-10-27 18:02:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 18:02:37,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 303 [2020-10-27 18:02:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:02:38,041 INFO L225 Difference]: With dead ends: 102363 [2020-10-27 18:02:38,041 INFO L226 Difference]: Without dead ends: 63783 [2020-10-27 18:02:38,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:02:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63783 states. [2020-10-27 18:02:40,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63783 to 63752. [2020-10-27 18:02:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63752 states. [2020-10-27 18:02:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63752 states to 63752 states and 86794 transitions. [2020-10-27 18:02:40,240 INFO L78 Accepts]: Start accepts. Automaton has 63752 states and 86794 transitions. Word has length 303 [2020-10-27 18:02:40,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:02:40,241 INFO L481 AbstractCegarLoop]: Abstraction has 63752 states and 86794 transitions. [2020-10-27 18:02:40,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:02:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 63752 states and 86794 transitions. [2020-10-27 18:02:40,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-10-27 18:02:40,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:02:40,542 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, 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, 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] [2020-10-27 18:02:40,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:02:40,543 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:02:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:02:40,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1815337165, now seen corresponding path program 1 times [2020-10-27 18:02:40,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:02:40,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405413019] [2020-10-27 18:02:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:02:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:40,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:40,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:40,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:42,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:42,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:43,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:43,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:43,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:44,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:45,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:45,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 422 [2020-10-27 18:02:45,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 18:02:45,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 18:02:45,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:45,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:02:45,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 373 [2020-10-27 18:02:45,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:02:45,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:45,867 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:02:45,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:02:45,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:45,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:45,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:45,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:02:45,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:45,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:02:45,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:45,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:02:45,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:45,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:02:45,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:45,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:02:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:45,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:45,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:45,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-27 18:02:45,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:45,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 18:02:45,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:02:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:02:45,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:02:46,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-10-27 18:02:46,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:46,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:46,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:46,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 18:02:46,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:46,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-27 18:02:46,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:46,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:02:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:02:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:02:46,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:46,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2020-10-27 18:02:46,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:02:46,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:02:46,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:02:46,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 18:02:46,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:02:46,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-27 18:02:46,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:02:46,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:02:46,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-10-27 18:02:46,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:02:46,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:02:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2020-10-27 18:02:46,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405413019] [2020-10-27 18:02:46,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:02:46,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 18:02:46,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079227988] [2020-10-27 18:02:46,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:02:46,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:02:46,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:02:46,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:02:46,592 INFO L87 Difference]: Start difference. First operand 63752 states and 86794 transitions. Second operand 5 states. [2020-10-27 18:02:46,727 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 66