/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_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:49:28,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:49:28,445 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:49:28,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:49:28,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:49:28,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:49:28,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:49:28,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:49:28,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:49:28,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:49:28,543 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:49:28,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:49:28,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:49:28,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:49:28,549 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:49:28,551 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:49:28,552 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:49:28,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:49:28,556 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:49:28,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:49:28,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:49:28,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:49:28,569 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:49:28,570 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:49:28,574 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:49:28,575 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:49:28,575 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:49:28,577 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:49:28,578 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:49:28,579 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:49:28,580 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:49:28,581 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:49:28,582 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:49:28,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:49:28,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:49:28,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:49:28,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:49:28,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:49:28,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:49:28,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:49:28,590 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:49:28,592 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 00:49:28,623 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:49:28,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:49:28,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:49:28,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:49:28,626 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:49:28,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:49:28,627 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:49:28,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:49:28,627 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:49:28,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:49:28,628 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:49:28,628 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:49:28,628 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:49:28,629 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:49:28,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:49:28,629 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:49:28,629 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:49:28,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:49:28,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:49:28,630 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:49:28,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:49:28,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:49:28,633 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:49:28,633 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:49:28,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:49:28,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:49:28,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:49:28,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:49:28,634 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:49:28,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:49:29,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:49:29,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:49:29,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:49:29,130 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:49:29,131 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:49:29,134 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label43.c [2020-10-27 00:49:29,232 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b3daafac/759aab6d0a514189aef54f643f2ba992/FLAG7cb6f01a5 [2020-10-27 00:49:30,766 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:49:30,768 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label43.c [2020-10-27 00:49:30,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b3daafac/759aab6d0a514189aef54f643f2ba992/FLAG7cb6f01a5 [2020-10-27 00:49:30,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0b3daafac/759aab6d0a514189aef54f643f2ba992 [2020-10-27 00:49:30,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:49:30,938 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:49:30,942 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:49:30,942 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:49:30,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:49:30,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:49:30" (1/1) ... [2020-10-27 00:49:30,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fcb6a42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:49:30, skipping insertion in model container [2020-10-27 00:49:30,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:49:30" (1/1) ... [2020-10-27 00:49:30,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:49:31,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:49:33,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:49:33,873 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:49:35,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:49:35,332 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:49:35,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:49:35 WrapperNode [2020-10-27 00:49:35,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:49:35,336 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:49:35,336 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:49:35,336 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:49:35,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:49:35" (1/1) ... [2020-10-27 00:49:35,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:49:35" (1/1) ... [2020-10-27 00:49:35,489 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:49:35" (1/1) ... [2020-10-27 00:49:35,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:49:35" (1/1) ... [2020-10-27 00:49:35,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:49:35" (1/1) ... [2020-10-27 00:49:35,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:49:35" (1/1) ... [2020-10-27 00:49:35,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:49:35" (1/1) ... [2020-10-27 00:49:36,185 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:49:36,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:49:36,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:49:36,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:49:36,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:49:35" (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 00:49:36,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:49:36,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:49:36,367 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:49:36,368 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:49:36,368 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:49:36,368 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:49:36,368 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:49:36,369 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:49:36,369 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:49:36,369 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:49:36,370 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:49:36,370 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:49:36,370 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:49:36,371 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:49:36,371 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:49:36,372 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:49:36,372 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:49:36,372 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:49:36,372 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:49:36,373 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:49:36,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:49:36,373 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:49:36,373 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:49:36,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:49:36,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:49:36,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:49:36,374 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:49:36,374 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:49:36,374 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:49:54,807 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:49:54,811 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:49:54,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:49:54 BoogieIcfgContainer [2020-10-27 00:49:54,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:49:54,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:49:54,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:49:54,830 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:49:54,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:49:30" (1/3) ... [2020-10-27 00:49:54,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec61d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:49:54, skipping insertion in model container [2020-10-27 00:49:54,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:49:35" (2/3) ... [2020-10-27 00:49:54,832 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ec61d31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:49:54, skipping insertion in model container [2020-10-27 00:49:54,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:49:54" (3/3) ... [2020-10-27 00:49:54,835 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label43.c [2020-10-27 00:49:54,851 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:49:54,860 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:49:54,878 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:49:54,923 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:49:54,924 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:49:54,924 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:49:54,924 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:49:54,924 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:49:54,925 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:49:54,925 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:49:54,925 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:49:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:49:55,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 00:49:55,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:49:55,006 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] [2020-10-27 00:49:55,006 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:49:55,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:49:55,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1687638702, now seen corresponding path program 1 times [2020-10-27 00:49:55,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:49:55,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290799599] [2020-10-27 00:49:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:49:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:49:55,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:55,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:49:55,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 00:49:55,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:49:55,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-27 00:49:55,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:49:55,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:49:55,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:49:55,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 00:49:55,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 00:49:56,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:49:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:49:56,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:49:56,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:49:56,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:49:56,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:49:56,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-27 00:49:56,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:49:56,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:49:56,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:49:56,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:49:56,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:49:56,206 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 00:49:56,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290799599] [2020-10-27 00:49:56,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:49:56,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:49:56,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959705836] [2020-10-27 00:49:56,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:49:56,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:49:56,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:49:56,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:49:56,244 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:50:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:50:32,289 INFO L93 Difference]: Finished difference Result 5036 states and 9459 transitions. [2020-10-27 00:50:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:50:32,293 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-27 00:50:32,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:50:32,352 INFO L225 Difference]: With dead ends: 5036 [2020-10-27 00:50:32,353 INFO L226 Difference]: Without dead ends: 3191 [2020-10-27 00:50:32,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:50:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3191 states. [2020-10-27 00:50:32,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3191 to 3185. [2020-10-27 00:50:32,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3185 states. [2020-10-27 00:50:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 4966 transitions. [2020-10-27 00:50:32,639 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 4966 transitions. Word has length 29 [2020-10-27 00:50:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:50:32,640 INFO L481 AbstractCegarLoop]: Abstraction has 3185 states and 4966 transitions. [2020-10-27 00:50:32,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:50:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 4966 transitions. [2020-10-27 00:50:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 00:50:32,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:50:32,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:50:32,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:50:32,648 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:50:32,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:50:32,649 INFO L82 PathProgramCache]: Analyzing trace with hash -974389909, now seen corresponding path program 1 times [2020-10-27 00:50:32,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:50:32,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120573823] [2020-10-27 00:50:32,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:50:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:50:32,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:32,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:32,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:33,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:35,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:50:35,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 00:50:35,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:50:35,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2370 [2020-10-27 00:50:35,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:50:35,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:50:35,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:50:35,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:50:35,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:50:35,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:50:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:50:35,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:35,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:50:35,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:50:35,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:50:35,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:50:35,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:50:35,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:50:35,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:50:35,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:50:35,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:50:35,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:50:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:50:35,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:35,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:50:35,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:50:35,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:50:35,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:50:35,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 306 [2020-10-27 00:50:35,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:50:35,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:50:35,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:50:35,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:50:35,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:50:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:50:35,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120573823] [2020-10-27 00:50:35,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:50:35,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:50:35,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347359755] [2020-10-27 00:50:35,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:50:35,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:50:35,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:50:35,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:50:35,746 INFO L87 Difference]: Start difference. First operand 3185 states and 4966 transitions. Second operand 7 states. [2020-10-27 00:51:31,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:51:31,654 INFO L93 Difference]: Finished difference Result 9436 states and 14755 transitions. [2020-10-27 00:51:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:51:31,656 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 102 [2020-10-27 00:51:31,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:51:31,697 INFO L225 Difference]: With dead ends: 9436 [2020-10-27 00:51:31,698 INFO L226 Difference]: Without dead ends: 6257 [2020-10-27 00:51:31,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:51:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6257 states. [2020-10-27 00:51:31,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6257 to 6166. [2020-10-27 00:51:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6166 states. [2020-10-27 00:51:31,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6166 states to 6166 states and 9307 transitions. [2020-10-27 00:51:31,928 INFO L78 Accepts]: Start accepts. Automaton has 6166 states and 9307 transitions. Word has length 102 [2020-10-27 00:51:31,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:51:31,929 INFO L481 AbstractCegarLoop]: Abstraction has 6166 states and 9307 transitions. [2020-10-27 00:51:31,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:51:31,930 INFO L276 IsEmpty]: Start isEmpty. Operand 6166 states and 9307 transitions. [2020-10-27 00:51:31,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 00:51:31,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:51:31,940 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:51:31,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:51:31,940 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:51:31,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:51:31,945 INFO L82 PathProgramCache]: Analyzing trace with hash 226510284, now seen corresponding path program 1 times [2020-10-27 00:51:31,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:51:31,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771050045] [2020-10-27 00:51:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:51:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:32,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:32,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:32,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:33,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:33,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 00:51:33,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:51:33,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1665 [2020-10-27 00:51:33,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:33,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:51:33,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:51:33,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 00:51:33,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:33,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:51:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:33,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:33,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:33,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:51:33,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:51:33,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 00:51:33,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:33,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:51:33,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:51:33,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:51:33,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:33,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:51:33,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:33,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:34,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:34,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 00:51:34,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:51:34,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-27 00:51:34,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:34,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:51:34,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:51:34,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 00:51:34,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:51:34,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771050045] [2020-10-27 00:51:34,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:51:34,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:51:34,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261471] [2020-10-27 00:51:34,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:51:34,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:51:34,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:51:34,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:51:34,289 INFO L87 Difference]: Start difference. First operand 6166 states and 9307 transitions. Second operand 7 states. [2020-10-27 00:52:22,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:52:22,714 INFO L93 Difference]: Finished difference Result 15428 states and 23179 transitions. [2020-10-27 00:52:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 00:52:22,718 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-10-27 00:52:22,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:52:22,769 INFO L225 Difference]: With dead ends: 15428 [2020-10-27 00:52:22,769 INFO L226 Difference]: Without dead ends: 9268 [2020-10-27 00:52:22,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 00:52:22,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9268 states. [2020-10-27 00:52:23,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9268 to 9041. [2020-10-27 00:52:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9041 states. [2020-10-27 00:52:23,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9041 states to 9041 states and 12403 transitions. [2020-10-27 00:52:23,048 INFO L78 Accepts]: Start accepts. Automaton has 9041 states and 12403 transitions. Word has length 124 [2020-10-27 00:52:23,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:52:23,052 INFO L481 AbstractCegarLoop]: Abstraction has 9041 states and 12403 transitions. [2020-10-27 00:52:23,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:52:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 9041 states and 12403 transitions. [2020-10-27 00:52:23,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 00:52:23,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:52:23,061 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:52:23,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:52:23,062 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:52:23,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:52:23,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1686419265, now seen corresponding path program 1 times [2020-10-27 00:52:23,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:52:23,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78958305] [2020-10-27 00:52:23,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:52:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:23,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:23,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:24,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:24,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:24,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 00:52:24,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:52:24,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1131 [2020-10-27 00:52:24,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:24,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 00:52:24,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:52:24,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-27 00:52:24,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:52:24,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:52:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:24,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:24,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:24,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:52:24,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:52:24,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 00:52:24,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:52:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:52:24,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:52:24,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:52:24,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:52:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:24,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:24,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:24,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:24,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 00:52:24,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:52:24,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 218 [2020-10-27 00:52:24,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:24,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:52:24,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:52:24,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-27 00:52:24,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:52:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-27 00:52:24,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78958305] [2020-10-27 00:52:24,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:52:24,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:52:24,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401727983] [2020-10-27 00:52:24,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:52:24,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:52:24,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:52:24,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:52:24,963 INFO L87 Difference]: Start difference. First operand 9041 states and 12403 transitions. Second operand 7 states.