/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_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:51:34,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:51:34,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:51:34,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:51:34,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:51:34,464 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:51:34,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:51:34,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:51:34,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:51:34,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:51:34,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:51:34,478 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:51:34,479 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:51:34,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:51:34,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:51:34,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:51:34,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:51:34,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:51:34,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:51:34,520 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:51:34,527 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:51:34,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:51:34,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:51:34,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:51:34,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:51:34,553 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:51:34,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:51:34,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:51:34,561 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:51:34,563 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 00:51:34,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 00:51:34,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 00:51:34,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 00:51:34,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 00:51:34,571 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 00:51:34,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 00:51:34,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 00:51:34,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 00:51:34,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:51:34,575 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:51:34,576 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:51:34,578 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 00:51:34,650 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:51:34,651 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:51:34,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:51:34,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:51:34,658 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:51:34,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:51:34,659 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:51:34,660 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:51:34,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:51:34,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:51:34,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:51:34,662 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:51:34,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:51:34,662 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:51:34,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:51:34,663 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:51:34,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:51:34,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:51:34,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:51:34,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:51:34,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:51:34,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:51:34,665 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:51:34,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:51:34,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:51:34,666 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:51:34,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:51:34,666 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:51:34,666 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:51:34,667 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:51:35,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:51:35,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:51:35,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:51:35,221 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:51:35,222 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:51:35,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label48.c [2020-10-27 00:51:35,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a8cda35f/7f2f05cc031e4040b092add8fb2d9b61/FLAG04ab3ea11 [2020-10-27 00:51:36,835 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:51:36,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label48.c [2020-10-27 00:51:36,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a8cda35f/7f2f05cc031e4040b092add8fb2d9b61/FLAG04ab3ea11 [2020-10-27 00:51:36,961 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9a8cda35f/7f2f05cc031e4040b092add8fb2d9b61 [2020-10-27 00:51:36,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:51:36,973 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:51:36,975 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:51:36,975 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:51:36,979 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:51:36,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:51:36" (1/1) ... [2020-10-27 00:51:36,985 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4118f9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:36, skipping insertion in model container [2020-10-27 00:51:36,985 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:51:36" (1/1) ... [2020-10-27 00:51:36,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:51:37,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:51:39,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:51:39,750 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:51:41,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:51:41,129 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:51:41,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:41 WrapperNode [2020-10-27 00:51:41,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:51:41,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:51:41,133 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:51:41,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:51:41,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:41" (1/1) ... [2020-10-27 00:51:41,154 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:41" (1/1) ... [2020-10-27 00:51:41,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:41" (1/1) ... [2020-10-27 00:51:41,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:41" (1/1) ... [2020-10-27 00:51:41,550 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:41" (1/1) ... [2020-10-27 00:51:41,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:41" (1/1) ... [2020-10-27 00:51:41,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:41" (1/1) ... [2020-10-27 00:51:41,876 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:51:41,878 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:51:41,878 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:51:41,878 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:51:41,880 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:41" (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 00:51:41,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:51:41,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:51:41,982 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:51:41,982 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:51:41,983 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:51:41,983 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 00:51:41,983 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 00:51:41,983 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 00:51:41,983 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 00:51:41,983 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:51:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:51:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:51:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 00:51:41,985 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 00:51:41,986 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 00:51:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 00:51:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:51:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:51:41,987 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:51:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:51:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:51:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:51:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:51:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:51:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:51:41,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:51:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:51:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:51:41,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:51:57,837 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:51:57,838 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:51:57,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:51:57 BoogieIcfgContainer [2020-10-27 00:51:57,844 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:51:57,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:51:57,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:51:57,851 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:51:57,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:51:36" (1/3) ... [2020-10-27 00:51:57,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28533b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:51:57, skipping insertion in model container [2020-10-27 00:51:57,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:51:41" (2/3) ... [2020-10-27 00:51:57,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28533b29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:51:57, skipping insertion in model container [2020-10-27 00:51:57,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:51:57" (3/3) ... [2020-10-27 00:51:57,856 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label48.c [2020-10-27 00:51:57,870 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:51:57,890 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:51:57,907 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:51:57,952 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:51:57,952 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:51:57,953 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:51:57,953 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:51:57,953 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:51:57,953 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:51:57,953 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:51:57,953 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:51:58,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 00:51:58,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 00:51:58,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:51:58,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:51:58,029 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:51:58,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:51:58,038 INFO L82 PathProgramCache]: Analyzing trace with hash 977726421, now seen corresponding path program 1 times [2020-10-27 00:51:58,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:51:58,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634144436] [2020-10-27 00:51:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:51:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:58,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:59,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:59,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 00:51:59,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:51:59,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 895 [2020-10-27 00:51:59,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:59,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:51:59,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:51:59,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 00:51:59,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:51:59,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:51:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:51:59,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:51:59,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:51:59,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:51:59,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:51:59,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 00:51:59,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:51:59,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:51:59,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:51:59,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:51:59,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:51:59,522 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 00:51:59,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1634144436] [2020-10-27 00:51:59,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:51:59,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:51:59,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506421425] [2020-10-27 00:51:59,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:51:59,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:51:59,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:51:59,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:51:59,556 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-27 00:52:31,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:52:31,636 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-27 00:52:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:52:31,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2020-10-27 00:52:31,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:52:31,698 INFO L225 Difference]: With dead ends: 5116 [2020-10-27 00:52:31,698 INFO L226 Difference]: Without dead ends: 3271 [2020-10-27 00:52:31,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:52:31,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-27 00:52:31,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-27 00:52:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-27 00:52:32,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-27 00:52:32,004 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 72 [2020-10-27 00:52:32,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:52:32,006 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-27 00:52:32,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:52:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-27 00:52:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 00:52:32,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:52:32,026 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:52:32,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:52:32,028 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:52:32,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:52:32,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2029645157, now seen corresponding path program 1 times [2020-10-27 00:52:32,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:52:32,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918787429] [2020-10-27 00:52:32,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:52:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:32,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:32,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:33,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:33,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-27 00:52:33,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:52:33,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1859 [2020-10-27 00:52:33,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:33,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:52:33,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:52:33,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 00:52:33,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 00:52:34,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:52:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:34,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:34,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:34,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:52:34,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:52:34,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 00:52:34,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:34,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:52:34,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:52:34,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:52:34,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 12 [2020-10-27 00:52:34,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:52:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:52:34,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:52:34,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:52:34,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 00:52:34,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:52:34,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-27 00:52:34,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:52:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:52:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:52:34,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-27 00:52:34,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:52:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:52:34,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918787429] [2020-10-27 00:52:34,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:52:34,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:52:34,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109863613] [2020-10-27 00:52:34,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:52:34,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:52:34,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:52:34,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:52:34,792 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 7 states. [2020-10-27 00:53:25,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:53:25,454 INFO L93 Difference]: Finished difference Result 9455 states and 16322 transitions. [2020-10-27 00:53:25,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:53:25,460 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 144 [2020-10-27 00:53:25,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:53:25,518 INFO L225 Difference]: With dead ends: 9455 [2020-10-27 00:53:25,519 INFO L226 Difference]: Without dead ends: 6261 [2020-10-27 00:53:25,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:53:25,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6261 states. [2020-10-27 00:53:25,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6261 to 6125. [2020-10-27 00:53:25,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6125 states. [2020-10-27 00:53:25,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6125 states to 6125 states and 9000 transitions. [2020-10-27 00:53:25,817 INFO L78 Accepts]: Start accepts. Automaton has 6125 states and 9000 transitions. Word has length 144 [2020-10-27 00:53:25,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:53:25,818 INFO L481 AbstractCegarLoop]: Abstraction has 6125 states and 9000 transitions. [2020-10-27 00:53:25,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:53:25,819 INFO L276 IsEmpty]: Start isEmpty. Operand 6125 states and 9000 transitions. [2020-10-27 00:53:25,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 00:53:25,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:53:25,823 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:53:25,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:53:25,823 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:53:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:53:25,824 INFO L82 PathProgramCache]: Analyzing trace with hash 2087289792, now seen corresponding path program 1 times [2020-10-27 00:53:25,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:53:25,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672563973] [2020-10-27 00:53:25,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:53:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:25,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:26,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:26,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:28,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:28,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 00:53:28,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:53:28,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2843 [2020-10-27 00:53:28,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:53:28,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:53:28,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:53:28,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:53:28,937 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:53:28,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:53:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:28,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:28,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:28,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:53:28,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:53:28,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 00:53:28,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:53:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:53:28,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:53:28,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:53:29,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:53:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:53:29,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:53:29,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:53:29,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 00:53:29,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:53:29,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 00:53:29,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:53:29,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:53:29,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:53:29,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:53:29,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:53:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:53:29,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672563973] [2020-10-27 00:53:29,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:53:29,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:53:29,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64687168] [2020-10-27 00:53:29,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:53:29,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:53:29,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:53:29,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:53:29,440 INFO L87 Difference]: Start difference. First operand 6125 states and 9000 transitions. Second operand 7 states. [2020-10-27 00:53:29,617 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:54:28,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:54:28,155 INFO L93 Difference]: Finished difference Result 18550 states and 27599 transitions. [2020-10-27 00:54:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:54:28,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 153 [2020-10-27 00:54:28,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:54:28,236 INFO L225 Difference]: With dead ends: 18550 [2020-10-27 00:54:28,237 INFO L226 Difference]: Without dead ends: 12431 [2020-10-27 00:54:28,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:54:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12431 states. [2020-10-27 00:54:28,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12431 to 12181. [2020-10-27 00:54:28,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12181 states. [2020-10-27 00:54:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12181 states to 12181 states and 17445 transitions. [2020-10-27 00:54:28,707 INFO L78 Accepts]: Start accepts. Automaton has 12181 states and 17445 transitions. Word has length 153 [2020-10-27 00:54:28,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:54:28,713 INFO L481 AbstractCegarLoop]: Abstraction has 12181 states and 17445 transitions. [2020-10-27 00:54:28,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:54:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 12181 states and 17445 transitions. [2020-10-27 00:54:28,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 00:54:28,720 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:54:28,720 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-27 00:54:28,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:54:28,721 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:54:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:54:28,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1858752234, now seen corresponding path program 1 times [2020-10-27 00:54:28,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:54:28,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159325324] [2020-10-27 00:54:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:54:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:28,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:28,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:30,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:31,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:31,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-27 00:54:31,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:54:31,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2303 [2020-10-27 00:54:31,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:31,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:54:31,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:54:31,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 00:54:31,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:31,262 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:54:31,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:54:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:31,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:31,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:31,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:54:31,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:54:31,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 00:54:31,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:31,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:54:31,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:54:31,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:54:31,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:54:31,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:54:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:54:31,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:54:31,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:54:31,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 00:54:31,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:54:31,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-10-27 00:54:31,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:54:31,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:54:31,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:54:31,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 00:54:31,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:54:31,875 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:54:31,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159325324] [2020-10-27 00:54:31,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:54:31,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:54:31,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031619382] [2020-10-27 00:54:31,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:54:31,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:54:31,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:54:31,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:54:31,878 INFO L87 Difference]: Start difference. First operand 12181 states and 17445 transitions. Second operand 7 states. [2020-10-27 00:54:32,068 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68