/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label04.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:37:43,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:37:43,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:37:43,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:37:43,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:37:43,442 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:37:43,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:37:43,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:37:43,453 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:37:43,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:37:43,461 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:37:43,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:37:43,463 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:37:43,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:37:43,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:37:43,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:37:43,473 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:37:43,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:37:43,484 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:37:43,499 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:37:43,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:37:43,506 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:37:43,508 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:37:43,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:37:43,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:37:43,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:37:43,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:37:43,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:37:43,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:37:43,516 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:37:43,516 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:37:43,517 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:37:43,518 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:37:43,519 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:37:43,520 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:37:43,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:37:43,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:37:43,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:37:43,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:37:43,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:37:43,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:37:43,525 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 00:37:43,552 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:37:43,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:37:43,555 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:37:43,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:37:43,555 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:37:43,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:37:43,556 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:37:43,556 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:37:43,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:37:43,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:37:43,556 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:37:43,557 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:37:43,557 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:37:43,557 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:37:43,557 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:37:43,557 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:37:43,558 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:37:43,558 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:37:43,558 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:37:43,558 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:37:43,559 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:37:43,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:37:43,559 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:37:43,559 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:37:43,560 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:37:43,560 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:37:43,560 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:37:43,560 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:37:43,560 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:37:43,561 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:37:43,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:37:44,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:37:44,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:37:44,022 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:37:44,023 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:37:44,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label04.c [2020-10-27 00:37:44,123 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/936316093/bd11b57b122f47069e0fbeb74feed5d9/FLAG5970967d1 [2020-10-27 00:37:45,437 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:37:45,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label04.c [2020-10-27 00:37:45,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/936316093/bd11b57b122f47069e0fbeb74feed5d9/FLAG5970967d1 [2020-10-27 00:37:45,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/936316093/bd11b57b122f47069e0fbeb74feed5d9 [2020-10-27 00:37:45,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:37:45,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:37:45,729 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:37:45,729 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:37:45,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:37:45,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:37:45" (1/1) ... [2020-10-27 00:37:45,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b5540fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:45, skipping insertion in model container [2020-10-27 00:37:45,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:37:45" (1/1) ... [2020-10-27 00:37:45,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:37:45,964 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:37:48,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:37:48,275 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:37:49,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:37:49,425 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:37:49,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:49 WrapperNode [2020-10-27 00:37:49,426 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:37:49,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:37:49,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:37:49,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:37:49,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:49" (1/1) ... [2020-10-27 00:37:49,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:49" (1/1) ... [2020-10-27 00:37:49,560 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:49" (1/1) ... [2020-10-27 00:37:49,561 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:49" (1/1) ... [2020-10-27 00:37:49,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:49" (1/1) ... [2020-10-27 00:37:49,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:49" (1/1) ... [2020-10-27 00:37:49,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:49" (1/1) ... [2020-10-27 00:37:50,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:37:50,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:37:50,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:37:50,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:37:50,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:49" (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 00:37:50,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:37:50,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:37:50,108 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:37:50,108 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:37:50,108 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:37:50,108 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:37:50,109 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:37:50,109 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:37:50,109 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:37:50,109 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:37:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:37:50,109 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:37:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:37:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:37:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:37:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:37:50,110 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:37:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:37:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:37:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:37:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:37:50,111 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:37:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:37:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:37:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:37:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:37:50,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:37:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:37:50,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:38:06,839 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:38:06,840 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:38:06,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:38:06 BoogieIcfgContainer [2020-10-27 00:38:06,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:38:06,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:38:06,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:38:06,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:38:06,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:37:45" (1/3) ... [2020-10-27 00:38:06,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ace29f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:38:06, skipping insertion in model container [2020-10-27 00:38:06,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:37:49" (2/3) ... [2020-10-27 00:38:06,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ace29f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:38:06, skipping insertion in model container [2020-10-27 00:38:06,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:38:06" (3/3) ... [2020-10-27 00:38:06,856 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label04.c [2020-10-27 00:38:06,869 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:38:06,889 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:38:06,904 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:38:06,947 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:38:06,947 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:38:06,948 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:38:06,948 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:38:06,948 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:38:06,948 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:38:06,948 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:38:06,948 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:38:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:38:07,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 00:38:07,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:38:07,011 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:38:07,012 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:38:07,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:38:07,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1482585906, now seen corresponding path program 1 times [2020-10-27 00:38:07,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:38:07,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552864967] [2020-10-27 00:38:07,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:38:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:07,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:07,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:07,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 00:38:07,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:38:07,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 637 [2020-10-27 00:38:07,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:07,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:38:07,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:38:07,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 00:38:07,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:38:08,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:38:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:08,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:08,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:08,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:38:08,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:38:08,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 00:38:08,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:08,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:38:08,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:38:08,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:38:08,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:38:08,226 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 00:38:08,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552864967] [2020-10-27 00:38:08,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:38:08,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 00:38:08,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681759204] [2020-10-27 00:38:08,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:38:08,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:38:08,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:38:08,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:38:08,256 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-27 00:38:36,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:38:36,412 INFO L93 Difference]: Finished difference Result 5091 states and 9567 transitions. [2020-10-27 00:38:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:38:36,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-27 00:38:36,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:38:36,472 INFO L225 Difference]: With dead ends: 5091 [2020-10-27 00:38:36,472 INFO L226 Difference]: Without dead ends: 3246 [2020-10-27 00:38:36,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 00:38:36,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2020-10-27 00:38:36,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 3179. [2020-10-27 00:38:36,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3179 states. [2020-10-27 00:38:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 5850 transitions. [2020-10-27 00:38:36,737 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 5850 transitions. Word has length 69 [2020-10-27 00:38:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:38:36,738 INFO L481 AbstractCegarLoop]: Abstraction has 3179 states and 5850 transitions. [2020-10-27 00:38:36,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:38:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 5850 transitions. [2020-10-27 00:38:36,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 00:38:36,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:38:36,746 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:38:36,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:38:36,747 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:38:36,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:38:36,747 INFO L82 PathProgramCache]: Analyzing trace with hash -927802528, now seen corresponding path program 1 times [2020-10-27 00:38:36,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:38:36,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337777367] [2020-10-27 00:38:36,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:38:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:36,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:36,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:37,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:37,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:38,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:38,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 00:38:38,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:38:38,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2077 [2020-10-27 00:38:38,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:38,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:38:38,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:38:38,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:38:38,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:38:39,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:38:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:39,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:39,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:39,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:38:39,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:38:39,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:38:39,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:39,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:38:39,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:38:39,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:38:39,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:38:39,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:38:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:38:39,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:39,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:38:39,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:38:39,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:38:39,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:38:39,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-27 00:38:39,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:38:39,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:38:39,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:38:39,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:38:39,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:38:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:38:39,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337777367] [2020-10-27 00:38:39,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:38:39,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:38:39,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040681236] [2020-10-27 00:38:39,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:38:39,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:38:39,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:38:39,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:38:39,483 INFO L87 Difference]: Start difference. First operand 3179 states and 5850 transitions. Second operand 7 states. [2020-10-27 00:39:23,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:39:23,970 INFO L93 Difference]: Finished difference Result 8044 states and 14835 transitions. [2020-10-27 00:39:23,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:39:23,974 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2020-10-27 00:39:23,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:39:24,012 INFO L225 Difference]: With dead ends: 8044 [2020-10-27 00:39:24,012 INFO L226 Difference]: Without dead ends: 4871 [2020-10-27 00:39:24,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:39:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4871 states. [2020-10-27 00:39:24,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4871 to 4753. [2020-10-27 00:39:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4753 states. [2020-10-27 00:39:24,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4753 states to 4753 states and 7991 transitions. [2020-10-27 00:39:24,187 INFO L78 Accepts]: Start accepts. Automaton has 4753 states and 7991 transitions. Word has length 140 [2020-10-27 00:39:24,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:39:24,188 INFO L481 AbstractCegarLoop]: Abstraction has 4753 states and 7991 transitions. [2020-10-27 00:39:24,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:39:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 4753 states and 7991 transitions. [2020-10-27 00:39:24,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 00:39:24,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:39:24,191 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 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 00:39:24,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:39:24,192 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:39:24,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:39:24,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1339435761, now seen corresponding path program 1 times [2020-10-27 00:39:24,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:39:24,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289110112] [2020-10-27 00:39:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:39:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:24,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:24,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:25,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:25,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 00:39:25,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:39:25,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1166 [2020-10-27 00:39:25,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:25,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:39:25,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:39:25,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:39:25,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:39:25,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:39:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:25,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:25,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:25,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:39:25,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:39:25,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:39:25,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:25,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:39:25,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:39:25,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:39:25,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:39:25,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:39:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:39:25,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:39:25,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:39:25,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 00:39:25,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:39:25,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-27 00:39:25,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:39:25,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:39:25,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:39:25,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:39:25,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:39:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:39:25,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289110112] [2020-10-27 00:39:25,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:39:25,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:39:25,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694992265] [2020-10-27 00:39:25,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:39:25,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:39:25,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:39:25,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:39:25,937 INFO L87 Difference]: Start difference. First operand 4753 states and 7991 transitions. Second operand 7 states. [2020-10-27 00:40:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:40:24,642 INFO L93 Difference]: Finished difference Result 14505 states and 24647 transitions. [2020-10-27 00:40:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:40:24,645 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 145 [2020-10-27 00:40:24,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:40:24,707 INFO L225 Difference]: With dead ends: 14505 [2020-10-27 00:40:24,708 INFO L226 Difference]: Without dead ends: 9758 [2020-10-27 00:40:24,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:40:24,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9758 states. [2020-10-27 00:40:25,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9758 to 9482. [2020-10-27 00:40:25,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9482 states. [2020-10-27 00:40:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9482 states to 9482 states and 13929 transitions. [2020-10-27 00:40:25,075 INFO L78 Accepts]: Start accepts. Automaton has 9482 states and 13929 transitions. Word has length 145 [2020-10-27 00:40:25,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:40:25,082 INFO L481 AbstractCegarLoop]: Abstraction has 9482 states and 13929 transitions. [2020-10-27 00:40:25,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:40:25,083 INFO L276 IsEmpty]: Start isEmpty. Operand 9482 states and 13929 transitions. [2020-10-27 00:40:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-27 00:40:25,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:40:25,089 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:40:25,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:40:25,090 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:40:25,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:40:25,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1848212957, now seen corresponding path program 1 times [2020-10-27 00:40:25,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:40:25,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619307030] [2020-10-27 00:40:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:40:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:25,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:25,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:26,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:26,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:27,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:27,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:27,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-27 00:40:27,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:40:27,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2822 [2020-10-27 00:40:27,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:27,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:40:27,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:40:27,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 00:40:27,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:28,179 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:40:28,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:40:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:28,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:28,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:28,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:40:28,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:28,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:40:28,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:40:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:40:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:40:28,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:28,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:40:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:28,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:28,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:28,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:40:28,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:28,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-27 00:40:28,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:40:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:40:28,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:40:28,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:40:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:40:28,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619307030] [2020-10-27 00:40:28,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:40:28,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:40:28,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327508313] [2020-10-27 00:40:28,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:40:28,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:40:28,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:40:28,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:40:28,627 INFO L87 Difference]: Start difference. First operand 9482 states and 13929 transitions. Second operand 7 states. [2020-10-27 00:40:28,796 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:40:35,967 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:41:35,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:41:35,334 INFO L93 Difference]: Finished difference Result 28556 states and 43375 transitions. [2020-10-27 00:41:35,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:41:35,339 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 155 [2020-10-27 00:41:35,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:41:35,429 INFO L225 Difference]: With dead ends: 28556 [2020-10-27 00:41:35,429 INFO L226 Difference]: Without dead ends: 19080 [2020-10-27 00:41:35,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:41:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19080 states. [2020-10-27 00:41:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19080 to 18491. [2020-10-27 00:41:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18491 states. [2020-10-27 00:41:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18491 states to 18491 states and 26134 transitions. [2020-10-27 00:41:36,015 INFO L78 Accepts]: Start accepts. Automaton has 18491 states and 26134 transitions. Word has length 155 [2020-10-27 00:41:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:41:36,017 INFO L481 AbstractCegarLoop]: Abstraction has 18491 states and 26134 transitions. [2020-10-27 00:41:36,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:41:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 18491 states and 26134 transitions. [2020-10-27 00:41:36,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-27 00:41:36,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:41:36,025 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:41:36,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:41:36,026 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:41:36,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:41:36,026 INFO L82 PathProgramCache]: Analyzing trace with hash -198528399, now seen corresponding path program 1 times [2020-10-27 00:41:36,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:41:36,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875592156] [2020-10-27 00:41:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:41:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:36,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:36,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:37,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:39,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:39,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-27 00:41:39,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:41:39,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2896 [2020-10-27 00:41:39,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:39,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:41:39,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:41:39,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-27 00:41:39,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:39,249 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:41:39,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:41:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:39,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:39,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:39,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:41:39,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:39,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 00:41:39,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:41:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:41:39,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:41:39,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:39,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:41:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:39,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:39,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:39,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-27 00:41:39,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:39,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 384 [2020-10-27 00:41:39,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:39,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:41:39,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:41:39,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-27 00:41:39,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:41:39,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875592156] [2020-10-27 00:41:39,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:41:39,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:41:39,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483041538] [2020-10-27 00:41:39,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:41:39,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:41:39,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:41:39,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:41:39,968 INFO L87 Difference]: Start difference. First operand 18491 states and 26134 transitions. Second operand 7 states. [2020-10-27 00:41:40,158 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 66