/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 22:56:05,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 22:56:05,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 22:56:05,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 22:56:05,312 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 22:56:05,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 22:56:05,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 22:56:05,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 22:56:05,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 22:56:05,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 22:56:05,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 22:56:05,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 22:56:05,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 22:56:05,345 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 22:56:05,347 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 22:56:05,348 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 22:56:05,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 22:56:05,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 22:56:05,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 22:56:05,369 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 22:56:05,371 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 22:56:05,373 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 22:56:05,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 22:56:05,377 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 22:56:05,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 22:56:05,388 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 22:56:05,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 22:56:05,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 22:56:05,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 22:56:05,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 22:56:05,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 22:56:05,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 22:56:05,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 22:56:05,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 22:56:05,399 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 22:56:05,399 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 22:56:05,400 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 22:56:05,400 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 22:56:05,401 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 22:56:05,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 22:56:05,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 22:56:05,410 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 22:56:05,460 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 22:56:05,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 22:56:05,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 22:56:05,465 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 22:56:05,465 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 22:56:05,465 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 22:56:05,465 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 22:56:05,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 22:56:05,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 22:56:05,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 22:56:05,468 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 22:56:05,468 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 22:56:05,468 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 22:56:05,469 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 22:56:05,469 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 22:56:05,469 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 22:56:05,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 22:56:05,470 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 22:56:05,470 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 22:56:05,470 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 22:56:05,470 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 22:56:05,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:56:05,471 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 22:56:05,471 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 22:56:05,471 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 22:56:05,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 22:56:05,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 22:56:05,472 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 22:56:05,472 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 22:56:05,473 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 22:56:05,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 22:56:05,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 22:56:05,943 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 22:56:05,944 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 22:56:05,945 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 22:56:05,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label37.c [2020-10-26 22:56:06,032 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16d118304/20a9310e76f34d07a0d4ffe81bcd0540/FLAG721e9cdca [2020-10-26 22:56:07,030 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 22:56:07,031 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem12_label37.c [2020-10-26 22:56:07,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16d118304/20a9310e76f34d07a0d4ffe81bcd0540/FLAG721e9cdca [2020-10-26 22:56:07,498 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/16d118304/20a9310e76f34d07a0d4ffe81bcd0540 [2020-10-26 22:56:07,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 22:56:07,508 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 22:56:07,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 22:56:07,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 22:56:07,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 22:56:07,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:56:07" (1/1) ... [2020-10-26 22:56:07,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16376597 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:07, skipping insertion in model container [2020-10-26 22:56:07,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 10:56:07" (1/1) ... [2020-10-26 22:56:07,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 22:56:07,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 22:56:09,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:56:09,196 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 22:56:09,815 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 22:56:09,849 INFO L208 MainTranslator]: Completed translation [2020-10-26 22:56:09,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:09 WrapperNode [2020-10-26 22:56:09,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 22:56:09,852 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 22:56:09,852 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 22:56:09,852 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 22:56:09,866 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:09" (1/1) ... [2020-10-26 22:56:09,868 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:09" (1/1) ... [2020-10-26 22:56:09,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:09" (1/1) ... [2020-10-26 22:56:09,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:09" (1/1) ... [2020-10-26 22:56:10,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:09" (1/1) ... [2020-10-26 22:56:10,105 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:09" (1/1) ... [2020-10-26 22:56:10,140 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:09" (1/1) ... [2020-10-26 22:56:10,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 22:56:10,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 22:56:10,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 22:56:10,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 22:56:10,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 22:56:10,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 22:56:10,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 22:56:10,282 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 22:56:10,282 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-26 22:56:10,282 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-26 22:56:10,283 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-26 22:56:10,283 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-26 22:56:10,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 22:56:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-26 22:56:10,283 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-26 22:56:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-26 22:56:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-26 22:56:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 22:56:10,284 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 22:56:10,285 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 22:56:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 22:56:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 22:56:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-26 22:56:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 22:56:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 22:56:10,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 22:56:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 22:56:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 22:56:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 22:56:10,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 22:56:15,725 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 22:56:15,725 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-26 22:56:15,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:56:15 BoogieIcfgContainer [2020-10-26 22:56:15,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 22:56:15,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 22:56:15,731 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 22:56:15,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 22:56:15,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 10:56:07" (1/3) ... [2020-10-26 22:56:15,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7805b089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:56:15, skipping insertion in model container [2020-10-26 22:56:15,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 10:56:09" (2/3) ... [2020-10-26 22:56:15,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7805b089 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 10:56:15, skipping insertion in model container [2020-10-26 22:56:15,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 10:56:15" (3/3) ... [2020-10-26 22:56:15,737 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label37.c [2020-10-26 22:56:15,749 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 22:56:15,754 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 22:56:15,768 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 22:56:15,800 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 22:56:15,800 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 22:56:15,800 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 22:56:15,801 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 22:56:15,801 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 22:56:15,801 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 22:56:15,801 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 22:56:15,801 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 22:56:15,835 INFO L276 IsEmpty]: Start isEmpty. Operand 843 states. [2020-10-26 22:56:15,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-26 22:56:15,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:15,843 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] [2020-10-26 22:56:15,843 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:15,850 INFO L82 PathProgramCache]: Analyzing trace with hash -554118484, now seen corresponding path program 1 times [2020-10-26 22:56:15,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:15,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570978930] [2020-10-26 22:56:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:16,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:16,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:16,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-26 22:56:16,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:16,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 456 [2020-10-26 22:56:16,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:16,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:56:16,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:56:16,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 22:56:16,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 22:56:16,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:16,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:16,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:16,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:16,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:16,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-26 22:56:16,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:16,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:16,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:16,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:56:16,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:56:16,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570978930] [2020-10-26 22:56:16,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:56:16,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 22:56:16,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011571983] [2020-10-26 22:56:16,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 22:56:16,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:16,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 22:56:16,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 22:56:16,810 INFO L87 Difference]: Start difference. First operand 843 states. Second operand 4 states. [2020-10-26 22:56:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:56:27,195 INFO L93 Difference]: Finished difference Result 2476 states and 4742 transitions. [2020-10-26 22:56:27,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:56:27,197 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-26 22:56:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:56:27,225 INFO L225 Difference]: With dead ends: 2476 [2020-10-26 22:56:27,226 INFO L226 Difference]: Without dead ends: 1569 [2020-10-26 22:56:27,235 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 [2020-10-26 22:56:27,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2020-10-26 22:56:27,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 1554. [2020-10-26 22:56:27,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1554 states. [2020-10-26 22:56:27,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 2522 transitions. [2020-10-26 22:56:27,372 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 2522 transitions. Word has length 20 [2020-10-26 22:56:27,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:56:27,372 INFO L481 AbstractCegarLoop]: Abstraction has 1554 states and 2522 transitions. [2020-10-26 22:56:27,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 22:56:27,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 2522 transitions. [2020-10-26 22:56:27,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 22:56:27,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:27,377 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 22:56:27,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 22:56:27,378 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:27,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:27,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1046876182, now seen corresponding path program 1 times [2020-10-26 22:56:27,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:27,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279114225] [2020-10-26 22:56:27,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:27,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:27,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:27,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 22:56:27,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:27,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 328 [2020-10-26 22:56:27,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:56:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:56:27,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 22:56:27,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:27,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:27,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:27,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:27,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:27,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:27,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 22:56:27,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:27,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:56:27,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:27,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:56:27,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:56:27,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:56:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:28,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:28,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:28,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:56:28,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:28,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-26 22:56:28,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:28,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:28,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:28,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:56:28,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:56:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:56:28,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279114225] [2020-10-26 22:56:28,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:56:28,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 22:56:28,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387216467] [2020-10-26 22:56:28,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 22:56:28,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:28,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 22:56:28,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:56:28,161 INFO L87 Difference]: Start difference. First operand 1554 states and 2522 transitions. Second operand 6 states. [2020-10-26 22:56:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:56:43,057 INFO L93 Difference]: Finished difference Result 6246 states and 10294 transitions. [2020-10-26 22:56:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 22:56:43,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 95 [2020-10-26 22:56:43,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:56:43,091 INFO L225 Difference]: With dead ends: 6246 [2020-10-26 22:56:43,092 INFO L226 Difference]: Without dead ends: 4698 [2020-10-26 22:56:43,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:56:43,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4698 states. [2020-10-26 22:56:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4698 to 4684. [2020-10-26 22:56:43,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4684 states. [2020-10-26 22:56:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 7310 transitions. [2020-10-26 22:56:43,230 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 7310 transitions. Word has length 95 [2020-10-26 22:56:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:56:43,231 INFO L481 AbstractCegarLoop]: Abstraction has 4684 states and 7310 transitions. [2020-10-26 22:56:43,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 22:56:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 7310 transitions. [2020-10-26 22:56:43,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 22:56:43,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:43,235 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 22:56:43,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 22:56:43,235 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:43,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:43,236 INFO L82 PathProgramCache]: Analyzing trace with hash 873614178, now seen corresponding path program 1 times [2020-10-26 22:56:43,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:43,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758782507] [2020-10-26 22:56:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:43,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:43,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:44,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:44,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 22:56:44,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:56:44,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1204 [2020-10-26 22:56:44,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:44,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:56:44,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:56:44,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 22:56:44,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 22:56:44,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:44,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:44,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:44,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:44,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:44,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 22:56:44,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:44,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:56:44,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:44,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:56:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:44,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:44,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:44,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 22:56:44,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:44,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-26 22:56:44,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:44,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:56:44,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:56:44,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 22:56:44,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:44,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:56:44,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758782507] [2020-10-26 22:56:44,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:56:44,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:56:45,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178966466] [2020-10-26 22:56:45,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:56:45,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:56:45,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:56:45,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:56:45,002 INFO L87 Difference]: Start difference. First operand 4684 states and 7310 transitions. Second operand 7 states. [2020-10-26 22:56:58,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:56:58,381 INFO L93 Difference]: Finished difference Result 14258 states and 22747 transitions. [2020-10-26 22:56:58,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:56:58,388 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 99 [2020-10-26 22:56:58,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:56:58,442 INFO L225 Difference]: With dead ends: 14258 [2020-10-26 22:56:58,443 INFO L226 Difference]: Without dead ends: 9580 [2020-10-26 22:56:58,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:56:58,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9580 states. [2020-10-26 22:56:58,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9580 to 9429. [2020-10-26 22:56:58,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9429 states. [2020-10-26 22:56:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9429 states to 9429 states and 13694 transitions. [2020-10-26 22:56:58,818 INFO L78 Accepts]: Start accepts. Automaton has 9429 states and 13694 transitions. Word has length 99 [2020-10-26 22:56:58,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:56:58,820 INFO L481 AbstractCegarLoop]: Abstraction has 9429 states and 13694 transitions. [2020-10-26 22:56:58,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:56:58,820 INFO L276 IsEmpty]: Start isEmpty. Operand 9429 states and 13694 transitions. [2020-10-26 22:56:58,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-26 22:56:58,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:56:58,830 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 22:56:58,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 22:56:58,830 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:56:58,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:56:58,835 INFO L82 PathProgramCache]: Analyzing trace with hash 975526328, now seen corresponding path program 1 times [2020-10-26 22:56:58,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:56:58,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636320955] [2020-10-26 22:56:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:56:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:58,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:59,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:59,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:59,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 22:56:59,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 22:56:59,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 842 [2020-10-26 22:56:59,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:59,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:56:59,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:56:59,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 22:56:59,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:56:59,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:56:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:59,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:56:59,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:56:59,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:56:59,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:56:59,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 22:56:59,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:56:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:56:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:56:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:56:59,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 22:56:59,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:56:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:56:59,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:00,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:00,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 22:57:00,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:00,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-10-26 22:57:00,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:00,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:00,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:00,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 22:57:00,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 22:57:00,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636320955] [2020-10-26 22:57:00,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 22:57:00,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-26 22:57:00,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159646921] [2020-10-26 22:57:00,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:57:00,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:57:00,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:57:00,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:57:00,135 INFO L87 Difference]: Start difference. First operand 9429 states and 13694 transitions. Second operand 7 states. [2020-10-26 22:57:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:57:15,810 INFO L93 Difference]: Finished difference Result 28817 states and 43655 transitions. [2020-10-26 22:57:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:57:15,812 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2020-10-26 22:57:15,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:57:15,907 INFO L225 Difference]: With dead ends: 28817 [2020-10-26 22:57:15,907 INFO L226 Difference]: Without dead ends: 19394 [2020-10-26 22:57:15,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:57:15,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19394 states. [2020-10-26 22:57:16,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19394 to 19189. [2020-10-26 22:57:16,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19189 states. [2020-10-26 22:57:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19189 states to 19189 states and 26172 transitions. [2020-10-26 22:57:16,615 INFO L78 Accepts]: Start accepts. Automaton has 19189 states and 26172 transitions. Word has length 110 [2020-10-26 22:57:16,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:57:16,618 INFO L481 AbstractCegarLoop]: Abstraction has 19189 states and 26172 transitions. [2020-10-26 22:57:16,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:57:16,618 INFO L276 IsEmpty]: Start isEmpty. Operand 19189 states and 26172 transitions. [2020-10-26 22:57:16,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-26 22:57:16,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:57:16,629 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:57:16,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 22:57:16,630 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:57:16,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:57:16,630 INFO L82 PathProgramCache]: Analyzing trace with hash -627056966, now seen corresponding path program 1 times [2020-10-26 22:57:16,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:57:16,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134588485] [2020-10-26 22:57:16,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:57:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:16,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:17,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:17,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:19,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:20,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:20,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-26 22:57:20,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:57:20,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4185 [2020-10-26 22:57:20,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:20,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:57:20,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:57:20,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-26 22:57:20,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:20,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:57:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:21,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:21,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:21,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:57:21,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:21,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-26 22:57:21,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:21,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:57:21,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:21,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:57:21,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:21,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:57:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:21,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:21,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:21,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 22:57:21,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:21,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-26 22:57:21,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:21,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:21,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:21,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-26 22:57:21,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:21,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-10-26 22:57:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:21,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:21,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:21,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-26 22:57:21,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:21,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-26 22:57:21,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:21,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:57:21,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-26 22:57:21,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:57:21,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:21,519 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:57:21,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134588485] [2020-10-26 22:57:21,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:57:21,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:57:21,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378472460] [2020-10-26 22:57:21,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:57:21,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:57:21,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:57:21,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:57:21,522 INFO L87 Difference]: Start difference. First operand 19189 states and 26172 transitions. Second operand 7 states. [2020-10-26 22:57:37,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:57:37,269 INFO L93 Difference]: Finished difference Result 53548 states and 82940 transitions. [2020-10-26 22:57:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:57:37,271 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 207 [2020-10-26 22:57:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:57:37,446 INFO L225 Difference]: With dead ends: 53548 [2020-10-26 22:57:37,446 INFO L226 Difference]: Without dead ends: 34365 [2020-10-26 22:57:37,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:57:37,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34365 states. [2020-10-26 22:57:38,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34365 to 31534. [2020-10-26 22:57:38,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31534 states. [2020-10-26 22:57:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31534 states to 31534 states and 41879 transitions. [2020-10-26 22:57:38,741 INFO L78 Accepts]: Start accepts. Automaton has 31534 states and 41879 transitions. Word has length 207 [2020-10-26 22:57:38,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:57:38,742 INFO L481 AbstractCegarLoop]: Abstraction has 31534 states and 41879 transitions. [2020-10-26 22:57:38,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:57:38,742 INFO L276 IsEmpty]: Start isEmpty. Operand 31534 states and 41879 transitions. [2020-10-26 22:57:38,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-26 22:57:38,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:57:38,746 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 22:57:38,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 22:57:38,746 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:57:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:57:38,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1449354126, now seen corresponding path program 1 times [2020-10-26 22:57:38,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:57:38,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103289227] [2020-10-26 22:57:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:57:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:38,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:38,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:39,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:40,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:40,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-26 22:57:40,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:57:40,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1510 [2020-10-26 22:57:40,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:40,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:40,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-26 22:57:40,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-26 22:57:40,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:40,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:57:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:40,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:40,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:40,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:57:40,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:40,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 22:57:40,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:40,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:57:40,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:40,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:57:40,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:40,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:57:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:40,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:40,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:40,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-26 22:57:40,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:40,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 22:57:40,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:40,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:57:40,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:57:40,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 22:57:40,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:40,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-10-26 22:57:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:57:40,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:57:40,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:57:40,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-26 22:57:40,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:57:40,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-26 22:57:40,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:57:40,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:57:40,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:57:40,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-26 22:57:40,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:57:41,272 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:57:41,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103289227] [2020-10-26 22:57:41,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:57:41,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 22:57:41,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451550915] [2020-10-26 22:57:41,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 22:57:41,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:57:41,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 22:57:41,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-26 22:57:41,278 INFO L87 Difference]: Start difference. First operand 31534 states and 41879 transitions. Second operand 8 states. [2020-10-26 22:58:03,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:58:03,066 INFO L93 Difference]: Finished difference Result 92209 states and 132099 transitions. [2020-10-26 22:58:03,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 22:58:03,068 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 219 [2020-10-26 22:58:03,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:58:03,267 INFO L225 Difference]: With dead ends: 92209 [2020-10-26 22:58:03,267 INFO L226 Difference]: Without dead ends: 57458 [2020-10-26 22:58:03,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-26 22:58:03,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57458 states. [2020-10-26 22:58:05,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57458 to 53559. [2020-10-26 22:58:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53559 states. [2020-10-26 22:58:05,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53559 states to 53559 states and 71848 transitions. [2020-10-26 22:58:05,393 INFO L78 Accepts]: Start accepts. Automaton has 53559 states and 71848 transitions. Word has length 219 [2020-10-26 22:58:05,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:58:05,393 INFO L481 AbstractCegarLoop]: Abstraction has 53559 states and 71848 transitions. [2020-10-26 22:58:05,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 22:58:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 53559 states and 71848 transitions. [2020-10-26 22:58:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-26 22:58:05,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:58:05,398 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:58:05,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 22:58:05,399 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:58:05,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:58:05,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1585828566, now seen corresponding path program 1 times [2020-10-26 22:58:05,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:58:05,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197232189] [2020-10-26 22:58:05,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:58:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:05,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:05,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:06,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:07,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:07,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 269 [2020-10-26 22:58:07,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:58:07,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1720 [2020-10-26 22:58:07,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:07,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:58:07,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 155 [2020-10-26 22:58:07,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-26 22:58:07,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:07,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:58:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:07,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:07,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:07,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:58:07,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:07,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:58:07,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:07,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:58:07,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:07,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:58:07,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:07,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:58:07,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:07,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:07,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:07,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:58:07,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:07,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-26 22:58:07,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:07,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:58:07,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:07,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-26 22:58:07,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:07,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:58:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:07,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:07,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:07,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 22:58:07,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:07,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-26 22:58:07,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:07,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:58:07,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:58:07,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 22:58:07,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:58:07,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197232189] [2020-10-26 22:58:07,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:58:07,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:58:07,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567884910] [2020-10-26 22:58:07,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:58:07,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:58:07,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:58:07,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:58:07,898 INFO L87 Difference]: Start difference. First operand 53559 states and 71848 transitions. Second operand 7 states. [2020-10-26 22:58:28,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:58:28,130 INFO L93 Difference]: Finished difference Result 111760 states and 149995 transitions. [2020-10-26 22:58:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:58:28,131 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 255 [2020-10-26 22:58:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:58:28,338 INFO L225 Difference]: With dead ends: 111760 [2020-10-26 22:58:28,338 INFO L226 Difference]: Without dead ends: 58974 [2020-10-26 22:58:28,424 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:58:28,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58974 states. [2020-10-26 22:58:30,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58974 to 58154. [2020-10-26 22:58:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58154 states. [2020-10-26 22:58:30,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58154 states to 58154 states and 75458 transitions. [2020-10-26 22:58:30,601 INFO L78 Accepts]: Start accepts. Automaton has 58154 states and 75458 transitions. Word has length 255 [2020-10-26 22:58:30,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:58:30,602 INFO L481 AbstractCegarLoop]: Abstraction has 58154 states and 75458 transitions. [2020-10-26 22:58:30,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:58:30,602 INFO L276 IsEmpty]: Start isEmpty. Operand 58154 states and 75458 transitions. [2020-10-26 22:58:30,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-10-26 22:58:30,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:58:30,607 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:58:30,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 22:58:30,608 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:58:30,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:58:30,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1871501840, now seen corresponding path program 1 times [2020-10-26 22:58:30,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:58:30,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010813739] [2020-10-26 22:58:30,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:58:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:30,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:30,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:32,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:32,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:35,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:35,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 272 [2020-10-26 22:58:35,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 22:58:35,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-26 22:58:35,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 22:58:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-26 22:58:35,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-26 22:58:35,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:35,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:58:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:35,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:35,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:35,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:58:35,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:35,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 22:58:35,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:35,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:58:35,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:35,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 22:58:35,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:35,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:58:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:35,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:36,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:36,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 22:58:36,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:36,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 213 [2020-10-26 22:58:36,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:36,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:58:36,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:58:36,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-26 22:58:36,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:36,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-10-26 22:58:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:36,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:36,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:36,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 22:58:36,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:36,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-26 22:58:36,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:36,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:58:36,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-26 22:58:36,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:58:36,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 24 proven. 85 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 22:58:36,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010813739] [2020-10-26 22:58:36,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:58:36,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:58:36,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601531649] [2020-10-26 22:58:36,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:58:36,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:58:36,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:58:36,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:58:36,751 INFO L87 Difference]: Start difference. First operand 58154 states and 75458 transitions. Second operand 7 states. [2020-10-26 22:58:51,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:58:51,962 INFO L93 Difference]: Finished difference Result 115947 states and 151448 transitions. [2020-10-26 22:58:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 22:58:51,963 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 258 [2020-10-26 22:58:51,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:58:52,199 INFO L225 Difference]: With dead ends: 115947 [2020-10-26 22:58:52,200 INFO L226 Difference]: Without dead ends: 58566 [2020-10-26 22:58:52,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 22:58:52,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58566 states. [2020-10-26 22:58:53,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58566 to 58400. [2020-10-26 22:58:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58400 states. [2020-10-26 22:58:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58400 states to 58400 states and 76163 transitions. [2020-10-26 22:58:54,186 INFO L78 Accepts]: Start accepts. Automaton has 58400 states and 76163 transitions. Word has length 258 [2020-10-26 22:58:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:58:54,186 INFO L481 AbstractCegarLoop]: Abstraction has 58400 states and 76163 transitions. [2020-10-26 22:58:54,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:58:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 58400 states and 76163 transitions. [2020-10-26 22:58:54,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-26 22:58:54,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:58:54,191 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:58:54,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 22:58:54,191 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:58:54,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:58:54,192 INFO L82 PathProgramCache]: Analyzing trace with hash -468147550, now seen corresponding path program 1 times [2020-10-26 22:58:54,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:58:54,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508138120] [2020-10-26 22:58:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:58:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:54,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:54,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:55,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:56,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:56,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-26 22:58:56,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 22:58:56,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1875 [2020-10-26 22:58:56,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:56,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:58:56,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-10-26 22:58:56,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-26 22:58:56,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:56,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:58:56,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:56,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:56,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:56,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:58:56,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:56,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 22:58:56,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:56,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:58:56,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:56,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:58:56,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:56,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:58:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:56,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:56,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:56,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:58:56,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:56,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-26 22:58:56,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:58:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:58:56,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-26 22:58:56,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:56,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:58:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:58:56,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:58:56,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:58:56,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 22:58:56,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:58:56,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-26 22:58:56,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:58:56,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:58:56,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-26 22:58:56,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-26 22:58:56,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:58:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 111 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 22:58:56,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508138120] [2020-10-26 22:58:56,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:58:56,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 22:58:56,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402634789] [2020-10-26 22:58:56,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 22:58:56,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:58:56,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 22:58:56,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 22:58:56,940 INFO L87 Difference]: Start difference. First operand 58400 states and 76163 transitions. Second operand 7 states. [2020-10-26 22:59:17,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:59:17,774 INFO L93 Difference]: Finished difference Result 144134 states and 200249 transitions. [2020-10-26 22:59:17,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 22:59:17,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 259 [2020-10-26 22:59:17,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:59:18,372 INFO L225 Difference]: With dead ends: 144134 [2020-10-26 22:59:18,372 INFO L226 Difference]: Without dead ends: 86507 [2020-10-26 22:59:18,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-26 22:59:18,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86507 states. [2020-10-26 22:59:20,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86507 to 84627. [2020-10-26 22:59:20,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84627 states. [2020-10-26 22:59:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84627 states to 84627 states and 109152 transitions. [2020-10-26 22:59:20,637 INFO L78 Accepts]: Start accepts. Automaton has 84627 states and 109152 transitions. Word has length 259 [2020-10-26 22:59:20,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:59:20,640 INFO L481 AbstractCegarLoop]: Abstraction has 84627 states and 109152 transitions. [2020-10-26 22:59:20,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 22:59:20,640 INFO L276 IsEmpty]: Start isEmpty. Operand 84627 states and 109152 transitions. [2020-10-26 22:59:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-10-26 22:59:20,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:59:20,668 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 22:59:20,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 22:59:20,668 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:59:20,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:59:20,669 INFO L82 PathProgramCache]: Analyzing trace with hash 615171584, now seen corresponding path program 1 times [2020-10-26 22:59:20,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:59:20,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758794411] [2020-10-26 22:59:20,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:59:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:20,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:21,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:21,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-26 22:59:21,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:21,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 549 [2020-10-26 22:59:21,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:21,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:59:21,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 260 [2020-10-26 22:59:21,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 22:59:21,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:21,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:59:21,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:21,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:21,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:21,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:59:21,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:21,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 22:59:21,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:21,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:59:21,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:21,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:59:21,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:21,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:59:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:21,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:21,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:21,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-26 22:59:21,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:21,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-26 22:59:21,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:21,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:59:21,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:21,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:59:21,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:21,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2020-10-26 22:59:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:21,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:21,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:21,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-26 22:59:21,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:21,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-10-26 22:59:21,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:21,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:59:21,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:21,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-26 22:59:21,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-26 22:59:21,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758794411] [2020-10-26 22:59:21,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:59:21,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:59:21,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30544414] [2020-10-26 22:59:21,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:59:21,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:59:21,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:59:21,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:59:21,909 INFO L87 Difference]: Start difference. First operand 84627 states and 109152 transitions. Second operand 5 states. [2020-10-26 22:59:38,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 22:59:38,427 INFO L93 Difference]: Finished difference Result 168528 states and 217632 transitions. [2020-10-26 22:59:38,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 22:59:38,429 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 268 [2020-10-26 22:59:38,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 22:59:38,835 INFO L225 Difference]: With dead ends: 168528 [2020-10-26 22:59:38,835 INFO L226 Difference]: Without dead ends: 84674 [2020-10-26 22:59:38,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-26 22:59:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84674 states. [2020-10-26 22:59:40,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84674 to 82246. [2020-10-26 22:59:40,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82246 states. [2020-10-26 22:59:40,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82246 states to 82246 states and 97687 transitions. [2020-10-26 22:59:40,369 INFO L78 Accepts]: Start accepts. Automaton has 82246 states and 97687 transitions. Word has length 268 [2020-10-26 22:59:40,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 22:59:40,370 INFO L481 AbstractCegarLoop]: Abstraction has 82246 states and 97687 transitions. [2020-10-26 22:59:40,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 22:59:40,370 INFO L276 IsEmpty]: Start isEmpty. Operand 82246 states and 97687 transitions. [2020-10-26 22:59:40,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-10-26 22:59:40,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 22:59:40,373 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-26 22:59:40,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 22:59:40,374 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 22:59:40,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 22:59:40,374 INFO L82 PathProgramCache]: Analyzing trace with hash 68195748, now seen corresponding path program 1 times [2020-10-26 22:59:40,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 22:59:40,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643807954] [2020-10-26 22:59:40,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 22:59:40,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:40,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:41,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:41,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 304 [2020-10-26 22:59:41,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:41,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 766 [2020-10-26 22:59:41,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:41,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 22:59:41,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 282 [2020-10-26 22:59:41,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 22:59:41,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:41,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 22:59:41,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:41,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:41,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:41,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 22:59:41,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:41,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 22:59:41,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:41,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:59:41,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:41,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:59:41,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:41,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-26 22:59:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:41,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:41,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:41,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-26 22:59:41,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:41,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-26 22:59:41,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:41,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 22:59:41,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:41,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 22:59:41,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:41,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2020-10-26 22:59:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 22:59:41,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 22:59:41,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 22:59:41,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 22:59:41,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 22:59:41,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-26 22:59:41,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 22:59:41,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 22:59:41,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 22:59:41,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-26 22:59:41,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 22:59:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-26 22:59:41,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643807954] [2020-10-26 22:59:41,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 22:59:41,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 22:59:41,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671532569] [2020-10-26 22:59:41,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 22:59:41,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 22:59:41,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 22:59:41,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 22:59:41,804 INFO L87 Difference]: Start difference. First operand 82246 states and 97687 transitions. Second operand 5 states.