/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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_label52.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:57:01,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:57:01,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:57:01,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:57:01,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:57:01,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:57:01,375 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:57:01,380 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:57:01,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:57:01,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:57:01,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:57:01,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:57:01,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:57:01,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:57:01,400 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:57:01,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:57:01,403 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:57:01,406 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:57:01,413 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:57:01,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:57:01,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:57:01,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:57:01,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:57:01,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:57:01,442 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:57:01,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:57:01,443 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:57:01,446 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:57:01,447 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:57:01,448 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:57:01,448 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:57:01,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:57:01,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:57:01,452 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:57:01,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:57:01,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:57:01,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:57:01,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:57:01,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:57:01,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:57:01,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:57:01,465 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 [2020-10-29 08:57:01,517 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:57:01,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:57:01,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:57:01,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:57:01,523 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:57:01,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:57:01,524 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:57:01,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:57:01,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:57:01,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:57:01,526 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:57:01,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:57:01,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:57:01,526 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:57:01,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:57:01,527 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:57:01,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:57:01,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:57:01,527 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:57:01,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:57:01,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:57:01,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:57:01,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:57:01,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:57:01,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:57:01,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:57:01,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:57:01,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:57:01,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:57:01,530 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:57:02,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:57:02,085 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:57:02,089 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:57:02,091 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:57:02,092 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:57:02,092 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label52.c [2020-10-29 08:57:02,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84fa4f979/2ef6d5bcb6a043ae869c2a2f5fe6fe64/FLAGcf08a0076 [2020-10-29 08:57:03,346 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:57:03,347 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label52.c [2020-10-29 08:57:03,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84fa4f979/2ef6d5bcb6a043ae869c2a2f5fe6fe64/FLAGcf08a0076 [2020-10-29 08:57:03,649 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84fa4f979/2ef6d5bcb6a043ae869c2a2f5fe6fe64 [2020-10-29 08:57:03,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:57:03,659 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:57:03,662 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:57:03,662 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:57:03,666 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:57:03,667 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:57:03" (1/1) ... [2020-10-29 08:57:03,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d5935a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:03, skipping insertion in model container [2020-10-29 08:57:03,671 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:57:03" (1/1) ... [2020-10-29 08:57:03,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:57:03,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:57:06,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:57:06,048 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:57:07,218 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:57:07,267 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:57:07,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:07 WrapperNode [2020-10-29 08:57:07,268 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:57:07,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:57:07,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:57:07,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:57:07,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:07" (1/1) ... [2020-10-29 08:57:07,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:07" (1/1) ... [2020-10-29 08:57:07,454 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:07" (1/1) ... [2020-10-29 08:57:07,455 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:07" (1/1) ... [2020-10-29 08:57:07,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:07" (1/1) ... [2020-10-29 08:57:07,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:07" (1/1) ... [2020-10-29 08:57:07,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:07" (1/1) ... [2020-10-29 08:57:08,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:57:08,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:57:08,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:57:08,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:57:08,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:07" (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 [2020-10-29 08:57:08,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:57:08,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:57:08,109 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:57:08,110 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:57:08,110 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:57:08,110 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:57:08,110 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:57:08,111 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:57:08,111 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:57:08,111 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:57:08,112 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:57:08,112 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:57:08,112 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:57:08,112 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:57:08,113 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:57:08,114 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:57:08,114 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:57:08,114 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:57:08,114 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:57:08,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:57:08,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:57:08,115 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:57:08,115 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:57:08,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:57:08,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:57:08,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:57:08,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:57:08,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:57:08,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:57:29,668 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:57:29,669 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:57:29,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:57:29 BoogieIcfgContainer [2020-10-29 08:57:29,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:57:29,677 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:57:29,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:57:29,681 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:57:29,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:57:03" (1/3) ... [2020-10-29 08:57:29,682 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d81980f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:57:29, skipping insertion in model container [2020-10-29 08:57:29,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:57:07" (2/3) ... [2020-10-29 08:57:29,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d81980f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:57:29, skipping insertion in model container [2020-10-29 08:57:29,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:57:29" (3/3) ... [2020-10-29 08:57:29,685 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label52.c [2020-10-29 08:57:29,697 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:57:29,704 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:57:29,720 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:57:29,782 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:57:29,783 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:57:29,783 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:57:29,783 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:57:29,783 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:57:29,783 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:57:29,783 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:57:29,784 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:57:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:57:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-29 08:57:29,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:57:29,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:57:29,868 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:57:29,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:57:29,879 INFO L82 PathProgramCache]: Analyzing trace with hash 875298829, now seen corresponding path program 1 times [2020-10-29 08:57:29,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:57:29,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769395168] [2020-10-29 08:57:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:57:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:57:30,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:30,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:57:30,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-29 08:57:30,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:57:30,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 622 [2020-10-29 08:57:30,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:57:30,975 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:57:30,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:57:30,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:57:30,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 08:57:30,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:57:31,212 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:57:31,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:57:31,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:57:31,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:57:31,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:57:31,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:57:31,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:57:31,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-29 08:57:31,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:57:31,275 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:57:31,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:57:31,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:57:31,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:57:31,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:57:31,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:57:31,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769395168] [2020-10-29 08:57:31,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:57:31,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:57:31,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867193218] [2020-10-29 08:57:31,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:57:31,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:57:31,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:57:31,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:57:31,359 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-29 08:57:31,535 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:58:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:58:09,837 INFO L93 Difference]: Finished difference Result 5100 states and 9572 transitions. [2020-10-29 08:58:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:58:09,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-29 08:58:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:58:09,899 INFO L225 Difference]: With dead ends: 5100 [2020-10-29 08:58:09,899 INFO L226 Difference]: Without dead ends: 3255 [2020-10-29 08:58:09,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:58:09,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2020-10-29 08:58:10,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 3209. [2020-10-29 08:58:10,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3209 states. [2020-10-29 08:58:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 5178 transitions. [2020-10-29 08:58:10,120 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 5178 transitions. Word has length 62 [2020-10-29 08:58:10,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:58:10,121 INFO L481 AbstractCegarLoop]: Abstraction has 3209 states and 5178 transitions. [2020-10-29 08:58:10,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:58:10,121 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 5178 transitions. [2020-10-29 08:58:10,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-29 08:58:10,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:58:10,129 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:58:10,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:58:10,129 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:58:10,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:58:10,130 INFO L82 PathProgramCache]: Analyzing trace with hash -337237180, now seen corresponding path program 1 times [2020-10-29 08:58:10,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:58:10,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960529917] [2020-10-29 08:58:10,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:58:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:10,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:10,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:11,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:12,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:12,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-29 08:58:12,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:58:12,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1847 [2020-10-29 08:58:12,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:12,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:12,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 08:58:12,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:58:12,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-29 08:58:12,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 08:58:12,314 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:58:12,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:58:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:12,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:12,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:12,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:58:12,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:58:12,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 08:58:12,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:12,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:12,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:58:12,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:58:12,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:58:12,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:58:12,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:58:12,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:58:12,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:12,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:58:12,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:58:12,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:58:12,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:58:12,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 226 [2020-10-29 08:58:12,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:58:12,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:58:12,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:58:12,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:58:12,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-29 08:58:12,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:58:12,803 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 08:58:12,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960529917] [2020-10-29 08:58:12,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:58:12,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-29 08:58:12,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158124287] [2020-10-29 08:58:12,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:58:12,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:58:12,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:58:12,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:58:12,810 INFO L87 Difference]: Start difference. First operand 3209 states and 5178 transitions. Second operand 7 states. [2020-10-29 08:58:13,002 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:58:13,955 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 08:59:12,217 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2020-10-29 08:59:21,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:59:21,488 INFO L93 Difference]: Finished difference Result 12096 states and 19889 transitions. [2020-10-29 08:59:21,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-29 08:59:21,490 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 137 [2020-10-29 08:59:21,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:59:21,546 INFO L225 Difference]: With dead ends: 12096 [2020-10-29 08:59:21,546 INFO L226 Difference]: Without dead ends: 8893 [2020-10-29 08:59:21,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-29 08:59:21,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8893 states. [2020-10-29 08:59:21,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8893 to 8883. [2020-10-29 08:59:21,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8883 states. [2020-10-29 08:59:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8883 states to 8883 states and 12506 transitions. [2020-10-29 08:59:21,823 INFO L78 Accepts]: Start accepts. Automaton has 8883 states and 12506 transitions. Word has length 137 [2020-10-29 08:59:21,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:59:21,826 INFO L481 AbstractCegarLoop]: Abstraction has 8883 states and 12506 transitions. [2020-10-29 08:59:21,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:59:21,826 INFO L276 IsEmpty]: Start isEmpty. Operand 8883 states and 12506 transitions. [2020-10-29 08:59:21,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-29 08:59:21,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:59:21,841 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:59:21,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:59:21,845 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:59:21,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:59:21,847 INFO L82 PathProgramCache]: Analyzing trace with hash -901475099, now seen corresponding path program 1 times [2020-10-29 08:59:21,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:59:21,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885680924] [2020-10-29 08:59:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:59:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:59:21,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:22,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:24,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:24,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:59:24,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-29 08:59:24,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:59:24,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3031 [2020-10-29 08:59:24,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:59:24,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:59:24,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:59:24,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:59:24,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-29 08:59:24,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:59:25,191 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:59:25,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:59:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:59:25,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:25,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:59:25,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:59:25,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:59:25,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 08:59:25,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:59:25,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:59:25,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:59:25,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:59:25,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:59:25,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:59:25,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:59:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:59:25,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:59:25,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:59:25,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-29 08:59:25,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:59:25,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 265 [2020-10-29 08:59:25,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:59:25,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:59:25,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:59:25,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:59:25,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-29 08:59:25,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:59:25,830 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:59:25,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885680924] [2020-10-29 08:59:25,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:59:25,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:59:25,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756273821] [2020-10-29 08:59:25,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:59:25,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:59:25,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:59:25,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:59:25,844 INFO L87 Difference]: Start difference. First operand 8883 states and 12506 transitions. Second operand 7 states. [2020-10-29 08:59:26,057 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:59:28,456 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-29 09:00:38,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:00:38,370 INFO L93 Difference]: Finished difference Result 26899 states and 38861 transitions. [2020-10-29 09:00:38,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 09:00:38,376 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 182 [2020-10-29 09:00:38,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:00:38,507 INFO L225 Difference]: With dead ends: 26899 [2020-10-29 09:00:38,508 INFO L226 Difference]: Without dead ends: 18022 [2020-10-29 09:00:38,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 09:00:38,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18022 states. [2020-10-29 09:00:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18022 to 17841. [2020-10-29 09:00:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17841 states. [2020-10-29 09:00:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17841 states to 17841 states and 23239 transitions. [2020-10-29 09:00:39,212 INFO L78 Accepts]: Start accepts. Automaton has 17841 states and 23239 transitions. Word has length 182 [2020-10-29 09:00:39,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:00:39,213 INFO L481 AbstractCegarLoop]: Abstraction has 17841 states and 23239 transitions. [2020-10-29 09:00:39,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 09:00:39,214 INFO L276 IsEmpty]: Start isEmpty. Operand 17841 states and 23239 transitions. [2020-10-29 09:00:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-29 09:00:39,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:00:39,222 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:00:39,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:00:39,223 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:00:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:00:39,224 INFO L82 PathProgramCache]: Analyzing trace with hash -2134654986, now seen corresponding path program 1 times [2020-10-29 09:00:39,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:00:39,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18726924] [2020-10-29 09:00:39,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:00:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:00:39,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:00:39,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:00:39,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:00:40,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:00:41,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:00:41,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-29 09:00:41,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:00:41,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1819 [2020-10-29 09:00:41,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:00:41,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:00:41,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 09:00:41,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 09:00:41,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-29 09:00:41,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:00:41,357 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 09:00:41,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:00:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:00:41,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:00:41,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:00:41,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:00:41,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:00:41,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 09:00:41,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:00:41,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:00:41,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:00:41,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:00:41,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 09:00:41,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:00:41,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 09:00:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:00:41,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:00:41,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:00:41,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:00:41,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-29 09:00:41,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:00:41,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-29 09:00:41,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:00:41,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:00:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 09:00:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 09:00:41,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-29 09:00:41,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:00:42,039 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:00:42,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18726924] [2020-10-29 09:00:42,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:00:42,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 09:00:42,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356889013] [2020-10-29 09:00:42,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 09:00:42,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:00:42,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 09:00:42,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 09:00:42,055 INFO L87 Difference]: Start difference. First operand 17841 states and 23239 transitions. Second operand 7 states. [2020-10-29 09:00:42,315 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 09:00:52,017 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 68