/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_label11.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:39:49,423 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:39:49,426 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:39:49,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:39:49,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:39:49,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:39:49,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:39:49,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:39:49,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:39:49,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:39:49,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:39:49,488 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:39:49,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:39:49,493 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:39:49,496 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:39:49,498 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:39:49,499 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:39:49,500 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:39:49,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:39:49,514 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:39:49,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:39:49,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:39:49,527 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:39:49,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:39:49,540 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:39:49,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:39:49,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:39:49,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:39:49,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:39:49,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:39:49,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:39:49,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:39:49,553 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:39:49,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:39:49,557 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:39:49,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:39:49,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:39:49,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:39:49,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:39:49,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:39:49,574 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:39:49,575 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 00:39:49,636 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:39:49,637 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:39:49,641 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:39:49,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:39:49,642 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:39:49,642 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:39:49,642 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:39:49,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:39:49,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:39:49,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:39:49,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:39:49,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:39:49,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:39:49,645 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:39:49,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:39:49,645 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:39:49,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:39:49,646 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:39:49,646 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:39:49,646 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:39:49,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:39:49,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:39:49,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:39:49,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:39:49,647 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:39:49,648 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:39:49,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:39:49,648 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:39:49,648 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:39:49,648 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:39:50,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:39:50,194 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:39:50,199 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:39:50,200 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:39:50,201 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:39:50,202 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label11.c [2020-10-27 00:39:50,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3015b59ad/01932dc16880483a8683cd9d8becccbb/FLAG7feaae9fa [2020-10-27 00:39:51,451 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:39:51,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label11.c [2020-10-27 00:39:51,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3015b59ad/01932dc16880483a8683cd9d8becccbb/FLAG7feaae9fa [2020-10-27 00:39:51,802 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3015b59ad/01932dc16880483a8683cd9d8becccbb [2020-10-27 00:39:51,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:39:51,812 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:39:51,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:39:51,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:39:51,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:39:51,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:39:51" (1/1) ... [2020-10-27 00:39:51,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@358d4810 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:51, skipping insertion in model container [2020-10-27 00:39:51,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:39:51" (1/1) ... [2020-10-27 00:39:51,844 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:39:52,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:39:54,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:39:54,351 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:39:55,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:39:55,697 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:39:55,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:55 WrapperNode [2020-10-27 00:39:55,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:39:55,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:39:55,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:39:55,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:39:55,717 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:55" (1/1) ... [2020-10-27 00:39:55,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:55" (1/1) ... [2020-10-27 00:39:55,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:55" (1/1) ... [2020-10-27 00:39:55,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:55" (1/1) ... [2020-10-27 00:39:56,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:55" (1/1) ... [2020-10-27 00:39:56,147 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:55" (1/1) ... [2020-10-27 00:39:56,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:55" (1/1) ... [2020-10-27 00:39:56,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:39:56,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:39:56,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:39:56,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:39:56,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:55" (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 00:39:56,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:39:56,348 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:39:56,349 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:39:56,349 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:39:56,349 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:39:56,349 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:39:56,349 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:39:56,350 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:39:56,350 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:39:56,350 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:39:56,350 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:39:56,350 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:39:56,350 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:39:56,351 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:39:56,351 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:39:56,351 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:39:56,351 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:39:56,351 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:39:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:39:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:39:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:39:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:39:56,352 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:39:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:39:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:39:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:39:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:39:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:39:56,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:40:13,020 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:40:13,021 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:40:13,026 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:40:13 BoogieIcfgContainer [2020-10-27 00:40:13,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:40:13,031 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:40:13,031 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:40:13,038 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:40:13,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:39:51" (1/3) ... [2020-10-27 00:40:13,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b098b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:40:13, skipping insertion in model container [2020-10-27 00:40:13,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:39:55" (2/3) ... [2020-10-27 00:40:13,041 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b098b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:40:13, skipping insertion in model container [2020-10-27 00:40:13,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:40:13" (3/3) ... [2020-10-27 00:40:13,044 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label11.c [2020-10-27 00:40:13,063 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:40:13,071 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:40:13,083 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:40:13,125 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:40:13,126 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:40:13,126 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:40:13,126 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:40:13,126 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:40:13,126 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:40:13,126 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:40:13,127 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:40:13,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:40:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-27 00:40:13,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:40:13,298 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] [2020-10-27 00:40:13,299 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:40:13,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:40:13,306 INFO L82 PathProgramCache]: Analyzing trace with hash 764466422, now seen corresponding path program 1 times [2020-10-27 00:40:13,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:40:13,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904894405] [2020-10-27 00:40:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:40:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:13,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:14,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:14,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 00:40:14,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:14,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 699 [2020-10-27 00:40:14,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:14,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:40:14,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:40:14,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 00:40:14,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:40:14,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:40:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:40:14,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:40:14,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:40:14,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:40:14,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:40:14,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-27 00:40:14,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:40:14,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:40:14,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:40:14,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:40:14,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:40:14,600 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 00:40:14,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904894405] [2020-10-27 00:40:14,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:40:14,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 00:40:14,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922483149] [2020-10-27 00:40:14,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:40:14,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:40:14,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:40:14,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:40:14,636 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-27 00:41:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:41:00,642 INFO L93 Difference]: Finished difference Result 6577 states and 12493 transitions. [2020-10-27 00:41:00,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:41:00,645 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-27 00:41:00,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:41:00,700 INFO L225 Difference]: With dead ends: 6577 [2020-10-27 00:41:00,700 INFO L226 Difference]: Without dead ends: 4728 [2020-10-27 00:41:00,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:41:00,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4728 states. [2020-10-27 00:41:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4728 to 4630. [2020-10-27 00:41:01,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4630 states. [2020-10-27 00:41:01,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4630 states to 4630 states and 8139 transitions. [2020-10-27 00:41:01,082 INFO L78 Accepts]: Start accepts. Automaton has 4630 states and 8139 transitions. Word has length 23 [2020-10-27 00:41:01,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:41:01,083 INFO L481 AbstractCegarLoop]: Abstraction has 4630 states and 8139 transitions. [2020-10-27 00:41:01,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:41:01,084 INFO L276 IsEmpty]: Start isEmpty. Operand 4630 states and 8139 transitions. [2020-10-27 00:41:01,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 00:41:01,096 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:41:01,097 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 00:41:01,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:41:01,099 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:41:01,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:41:01,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1198250428, now seen corresponding path program 1 times [2020-10-27 00:41:01,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:41:01,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447935131] [2020-10-27 00:41:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:41:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:01,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:01,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:02,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:02,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-27 00:41:02,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:41:02,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1662 [2020-10-27 00:41:02,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:02,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:41:02,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:41:02,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-27 00:41:02,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 00:41:03,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:41:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:03,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:03,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:03,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:41:03,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:03,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-27 00:41:03,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:03,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:41:03,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:41:03,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:41:03,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-27 00:41:03,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:41:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:03,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:03,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:03,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 00:41:03,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:03,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-27 00:41:03,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:03,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:41:03,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:41:03,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 00:41:03,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:41:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:41:03,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447935131] [2020-10-27 00:41:03,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:41:03,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:41:03,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347678826] [2020-10-27 00:41:03,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:41:03,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:41:03,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:41:03,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:41:03,585 INFO L87 Difference]: Start difference. First operand 4630 states and 8139 transitions. Second operand 7 states. [2020-10-27 00:41:52,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:41:52,265 INFO L93 Difference]: Finished difference Result 10893 states and 18919 transitions. [2020-10-27 00:41:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:41:52,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 122 [2020-10-27 00:41:52,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:41:52,326 INFO L225 Difference]: With dead ends: 10893 [2020-10-27 00:41:52,326 INFO L226 Difference]: Without dead ends: 6269 [2020-10-27 00:41:52,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:41:52,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2020-10-27 00:41:52,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 6175. [2020-10-27 00:41:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6175 states. [2020-10-27 00:41:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6175 states to 6175 states and 10287 transitions. [2020-10-27 00:41:52,620 INFO L78 Accepts]: Start accepts. Automaton has 6175 states and 10287 transitions. Word has length 122 [2020-10-27 00:41:52,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:41:52,624 INFO L481 AbstractCegarLoop]: Abstraction has 6175 states and 10287 transitions. [2020-10-27 00:41:52,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:41:52,624 INFO L276 IsEmpty]: Start isEmpty. Operand 6175 states and 10287 transitions. [2020-10-27 00:41:52,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 00:41:52,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:41:52,636 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 00:41:52,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:41:52,638 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:41:52,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:41:52,638 INFO L82 PathProgramCache]: Analyzing trace with hash -2103651552, now seen corresponding path program 1 times [2020-10-27 00:41:52,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:41:52,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846116719] [2020-10-27 00:41:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:41:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:52,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:53,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:53,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 00:41:53,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:53,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-27 00:41:53,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:53,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:41:53,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:41:53,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 00:41:53,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:41:53,473 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:41:53,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:41:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:53,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:53,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:53,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:41:53,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:53,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 00:41:53,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:53,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:41:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:41:53,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:41:53,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:41:53,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:41:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:41:53,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:41:54,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:41:54,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 00:41:54,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:41:54,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-27 00:41:54,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:41:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:41:54,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:41:54,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:41:54,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:41:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:41:54,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846116719] [2020-10-27 00:41:54,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:41:54,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:41:54,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386619379] [2020-10-27 00:41:54,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:41:54,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:41:54,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:41:54,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:41:54,239 INFO L87 Difference]: Start difference. First operand 6175 states and 10287 transitions. Second operand 7 states. [2020-10-27 00:41:54,401 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:41:56,386 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:42:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:42:50,003 INFO L93 Difference]: Finished difference Result 18830 states and 32251 transitions. [2020-10-27 00:42:50,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:42:50,010 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 124 [2020-10-27 00:42:50,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:42:50,086 INFO L225 Difference]: With dead ends: 18830 [2020-10-27 00:42:50,086 INFO L226 Difference]: Without dead ends: 12661 [2020-10-27 00:42:50,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:42:50,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12661 states. [2020-10-27 00:42:50,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12661 to 12309. [2020-10-27 00:42:50,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12309 states. [2020-10-27 00:42:50,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12309 states to 12309 states and 18036 transitions. [2020-10-27 00:42:50,521 INFO L78 Accepts]: Start accepts. Automaton has 12309 states and 18036 transitions. Word has length 124 [2020-10-27 00:42:50,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:42:50,524 INFO L481 AbstractCegarLoop]: Abstraction has 12309 states and 18036 transitions. [2020-10-27 00:42:50,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:42:50,529 INFO L276 IsEmpty]: Start isEmpty. Operand 12309 states and 18036 transitions. [2020-10-27 00:42:50,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 00:42:50,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:42:50,538 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:42:50,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:42:50,538 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:42:50,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:42:50,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1945364656, now seen corresponding path program 1 times [2020-10-27 00:42:50,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:42:50,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723416769] [2020-10-27 00:42:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:42:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:50,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:51,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:51,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 00:42:51,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:51,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 501 [2020-10-27 00:42:51,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:51,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:42:51,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:42:51,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-27 00:42:51,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:51,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:42:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:51,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:51,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:51,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:42:51,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:51,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 00:42:51,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:51,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:42:51,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:42:51,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:42:51,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:51,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:42:51,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:42:51,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:42:51,518 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:42:51,518 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:42:51,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:42:51,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-27 00:42:51,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:42:51,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:42:51,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:42:51,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:42:51,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:42:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:42:51,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723416769] [2020-10-27 00:42:51,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:42:51,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:42:51,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643058456] [2020-10-27 00:42:51,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:42:51,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:42:51,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:42:51,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:42:51,649 INFO L87 Difference]: Start difference. First operand 12309 states and 18036 transitions. Second operand 7 states. [2020-10-27 00:42:51,796 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66