/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:50:02,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:50:02,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:50:02,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:50:02,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:50:02,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:50:02,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:50:02,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:50:02,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:50:02,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:50:02,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:50:02,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:50:02,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:50:02,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:50:02,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:50:02,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:50:02,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:50:02,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:50:02,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:50:02,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:50:02,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:50:02,500 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:50:02,502 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:50:02,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:50:02,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:50:02,508 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:50:02,508 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:50:02,510 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:50:02,511 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:50:02,512 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:50:02,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:50:02,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:50:02,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:50:02,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:50:02,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:50:02,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:50:02,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:50:02,521 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:50:02,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:50:02,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:50:02,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:50:02,529 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 00:50:02,565 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:50:02,565 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:50:02,570 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:50:02,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:50:02,570 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:50:02,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:50:02,571 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:50:02,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:50:02,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:50:02,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:50:02,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:50:02,573 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:50:02,575 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:50:02,576 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:50:02,576 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:50:02,576 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:50:02,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:50:02,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:50:02,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:50:02,578 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:50:02,578 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:50:02,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:50:02,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:50:02,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:50:02,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:50:02,581 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:50:02,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:50:02,582 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:50:02,583 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:50:02,583 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:50:03,087 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:50:03,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:50:03,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:50:03,132 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:50:03,133 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:50:03,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label46.c [2020-10-27 00:50:03,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e850afa4/b58dcc7fb80b4918899d389efcc31fdc/FLAG85fab0b89 [2020-10-27 00:50:04,541 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:50:04,542 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label46.c [2020-10-27 00:50:04,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e850afa4/b58dcc7fb80b4918899d389efcc31fdc/FLAG85fab0b89 [2020-10-27 00:50:04,752 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6e850afa4/b58dcc7fb80b4918899d389efcc31fdc [2020-10-27 00:50:04,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:50:04,764 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:50:04,769 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:50:04,769 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:50:04,776 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:50:04,777 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:50:04" (1/1) ... [2020-10-27 00:50:04,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79f177e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:50:04, skipping insertion in model container [2020-10-27 00:50:04,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:50:04" (1/1) ... [2020-10-27 00:50:04,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:50:05,033 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:50:07,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:50:07,463 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:50:08,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:50:08,731 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:50:08,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:50:08 WrapperNode [2020-10-27 00:50:08,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:50:08,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:50:08,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:50:08,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:50:08,756 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:50:08" (1/1) ... [2020-10-27 00:50:08,759 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:50:08" (1/1) ... [2020-10-27 00:50:08,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:50:08" (1/1) ... [2020-10-27 00:50:08,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:50:08" (1/1) ... [2020-10-27 00:50:09,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:50:08" (1/1) ... [2020-10-27 00:50:09,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:50:08" (1/1) ... [2020-10-27 00:50:09,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:50:08" (1/1) ... [2020-10-27 00:50:09,617 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:50:09,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:50:09,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:50:09,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:50:09,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:50:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:50:09,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:50:09,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:50:09,789 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:50:09,789 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:50:09,789 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:50:09,789 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:50:09,790 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:50:09,790 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:50:09,790 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:50:09,790 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:50:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:50:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:50:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:50:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:50:09,792 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:50:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:50:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:50:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:50:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:50:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:50:09,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:50:09,795 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:50:09,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:50:09,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:50:09,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:50:09,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:50:09,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:50:09,795 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:50:09,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:50:28,363 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:50:28,364 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:50:28,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:50:28 BoogieIcfgContainer [2020-10-27 00:50:28,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:50:28,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:50:28,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:50:28,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:50:28,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:50:04" (1/3) ... [2020-10-27 00:50:28,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c17facf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:50:28, skipping insertion in model container [2020-10-27 00:50:28,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:50:08" (2/3) ... [2020-10-27 00:50:28,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c17facf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:50:28, skipping insertion in model container [2020-10-27 00:50:28,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:50:28" (3/3) ... [2020-10-27 00:50:28,381 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label46.c [2020-10-27 00:50:28,398 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:50:28,406 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:50:28,424 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:50:28,471 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:50:28,471 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:50:28,472 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:50:28,472 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:50:28,472 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:50:28,472 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:50:28,472 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:50:28,472 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:50:28,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:50:28,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 00:50:28,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:50:28,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:50:28,540 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:50:28,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:50:28,549 INFO L82 PathProgramCache]: Analyzing trace with hash 965166134, now seen corresponding path program 1 times [2020-10-27 00:50:28,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:50:28,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301858493] [2020-10-27 00:50:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:50:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:50:29,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:29,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:50:29,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 00:50:29,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:50:29,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-27 00:50:29,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:50:29,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:50:29,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:50:29,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 00:50:29,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:50:29,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:50:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:50:29,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:29,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:50:29,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:50:29,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:50:29,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 00:50:29,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:50:29,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:50:29,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:50:29,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:50:29,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:50:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:50:29,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301858493] [2020-10-27 00:50:29,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:50:29,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:50:29,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118914230] [2020-10-27 00:50:29,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:50:29,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:50:29,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:50:29,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:50:29,914 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:50:30,182 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:51:11,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:51:11,397 INFO L93 Difference]: Finished difference Result 5081 states and 9549 transitions. [2020-10-27 00:51:11,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:51:11,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-27 00:51:11,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:51:11,453 INFO L225 Difference]: With dead ends: 5081 [2020-10-27 00:51:11,454 INFO L226 Difference]: Without dead ends: 3220 [2020-10-27 00:51:11,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:51:11,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2020-10-27 00:51:11,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 3195. [2020-10-27 00:51:11,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3195 states. [2020-10-27 00:51:11,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 5074 transitions. [2020-10-27 00:51:11,772 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 5074 transitions. Word has length 39 [2020-10-27 00:51:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:51:11,774 INFO L481 AbstractCegarLoop]: Abstraction has 3195 states and 5074 transitions. [2020-10-27 00:51:11,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:51:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 5074 transitions. [2020-10-27 00:51:11,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 00:51:11,781 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:51:11,782 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:51:11,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:51:11,783 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:51:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:51:11,784 INFO L82 PathProgramCache]: Analyzing trace with hash -741151704, now seen corresponding path program 1 times [2020-10-27 00:51:11,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:51:11,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589032762] [2020-10-27 00:51:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:51:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:11,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:12,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:12,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:12,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:14,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:14,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 00:51:14,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:51:14,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2219 [2020-10-27 00:51:14,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:14,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:51:14,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:51:14,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:51:14,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:51:14,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:51:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:14,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:14,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:14,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:51:14,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:51:14,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 00:51:14,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:14,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:51:14,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:51:14,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:51:14,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:14,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:51:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:14,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:14,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:14,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:14,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:51:14,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:51:14,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 00:51:14,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:14,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:51:14,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:51:14,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:51:14,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:51:14,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589032762] [2020-10-27 00:51:14,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:51:14,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:51:14,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92143634] [2020-10-27 00:51:14,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:51:14,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:51:14,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:51:14,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:51:14,796 INFO L87 Difference]: Start difference. First operand 3195 states and 5074 transitions. Second operand 7 states. [2020-10-27 00:51:16,380 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-27 00:51:55,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:51:55,477 INFO L93 Difference]: Finished difference Result 9445 states and 15088 transitions. [2020-10-27 00:51:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:51:55,479 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 110 [2020-10-27 00:51:55,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:51:55,522 INFO L225 Difference]: With dead ends: 9445 [2020-10-27 00:51:55,522 INFO L226 Difference]: Without dead ends: 6256 [2020-10-27 00:51:55,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:51:55,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6256 states. [2020-10-27 00:51:55,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6256 to 6157. [2020-10-27 00:51:55,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6157 states. [2020-10-27 00:51:55,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6157 states to 6157 states and 8748 transitions. [2020-10-27 00:51:55,837 INFO L78 Accepts]: Start accepts. Automaton has 6157 states and 8748 transitions. Word has length 110 [2020-10-27 00:51:55,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:51:55,838 INFO L481 AbstractCegarLoop]: Abstraction has 6157 states and 8748 transitions. [2020-10-27 00:51:55,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:51:55,838 INFO L276 IsEmpty]: Start isEmpty. Operand 6157 states and 8748 transitions. [2020-10-27 00:51:55,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-27 00:51:55,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:51:55,843 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:51:55,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:51:55,843 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:51:55,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:51:55,844 INFO L82 PathProgramCache]: Analyzing trace with hash -63599264, now seen corresponding path program 1 times [2020-10-27 00:51:55,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:51:55,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754927274] [2020-10-27 00:51:55,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:51:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:55,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:56,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:57,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:57,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:57,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-27 00:51:57,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:51:57,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1880 [2020-10-27 00:51:57,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:57,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:51:57,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:51:57,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 00:51:57,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:57,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:51:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:57,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:57,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:57,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:51:57,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:51:57,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 00:51:57,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:57,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:51:57,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:51:57,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:51:57,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:58,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:51:58,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:58,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:58,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:58,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 00:51:58,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:51:58,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-27 00:51:58,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:58,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:51:58,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:51:58,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:51:58,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:51:58,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754927274] [2020-10-27 00:51:58,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:51:58,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:51:58,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471559661] [2020-10-27 00:51:58,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:51:58,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:51:58,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:51:58,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:51:58,416 INFO L87 Difference]: Start difference. First operand 6157 states and 8748 transitions. Second operand 7 states. [2020-10-27 00:51:58,573 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:52:59,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:52:59,054 INFO L93 Difference]: Finished difference Result 18813 states and 27208 transitions. [2020-10-27 00:52:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:52:59,058 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 140 [2020-10-27 00:52:59,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:52:59,134 INFO L225 Difference]: With dead ends: 18813 [2020-10-27 00:52:59,135 INFO L226 Difference]: Without dead ends: 12662 [2020-10-27 00:52:59,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:52:59,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12662 states. [2020-10-27 00:52:59,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12662 to 12377. [2020-10-27 00:52:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12377 states. [2020-10-27 00:52:59,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12377 states to 12377 states and 16075 transitions. [2020-10-27 00:52:59,602 INFO L78 Accepts]: Start accepts. Automaton has 12377 states and 16075 transitions. Word has length 140 [2020-10-27 00:52:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:52:59,605 INFO L481 AbstractCegarLoop]: Abstraction has 12377 states and 16075 transitions. [2020-10-27 00:52:59,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:52:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 12377 states and 16075 transitions. [2020-10-27 00:52:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-27 00:52:59,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:52:59,612 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:52:59,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:52:59,614 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:52:59,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:52:59,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1543537392, now seen corresponding path program 1 times [2020-10-27 00:52:59,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:52:59,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355909445] [2020-10-27 00:52:59,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:52:59,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:59,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:59,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:00,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:01,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:01,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-27 00:53:01,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:53:01,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1749 [2020-10-27 00:53:01,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:53:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:53:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 00:53:01,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:53:01,769 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:53:01,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:53:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:01,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:01,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:01,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:53:01,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:53:01,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 00:53:01,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:01,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:53:01,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:53:01,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:53:01,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:53:01,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:53:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:01,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:02,126 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:02,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:53:02,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:53:02,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 00:53:02,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:02,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:53:02,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:53:02,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:53:02,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:53:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:53:02,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355909445] [2020-10-27 00:53:02,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:53:02,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 00:53:02,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475613232] [2020-10-27 00:53:02,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:53:02,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:53:02,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:53:02,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:53:02,361 INFO L87 Difference]: Start difference. First operand 12377 states and 16075 transitions. Second operand 8 states. [2020-10-27 00:53:02,533 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:53:07,173 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 67