/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem19_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 08:44:45,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 08:44:45,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 08:44:45,430 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 08:44:45,431 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 08:44:45,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 08:44:45,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 08:44:45,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 08:44:45,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 08:44:45,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 08:44:45,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 08:44:45,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 08:44:45,447 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 08:44:45,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 08:44:45,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 08:44:45,452 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 08:44:45,453 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 08:44:45,455 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 08:44:45,457 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 08:44:45,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 08:44:45,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 08:44:45,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 08:44:45,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 08:44:45,468 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 08:44:45,472 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 08:44:45,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 08:44:45,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 08:44:45,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 08:44:45,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 08:44:45,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 08:44:45,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 08:44:45,491 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 08:44:45,493 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 08:44:45,494 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 08:44:45,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 08:44:45,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 08:44:45,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 08:44:45,499 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 08:44:45,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 08:44:45,501 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 08:44:45,502 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 08:44:45,503 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 08:44:45,564 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 08:44:45,564 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 08:44:45,568 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 08:44:45,570 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 08:44:45,570 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 08:44:45,570 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 08:44:45,570 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 08:44:45,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 08:44:45,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 08:44:45,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 08:44:45,571 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 08:44:45,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 08:44:45,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 08:44:45,572 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 08:44:45,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 08:44:45,573 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 08:44:45,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 08:44:45,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 08:44:45,575 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 08:44:45,575 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 08:44:45,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 08:44:45,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:44:45,576 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 08:44:45,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 08:44:45,577 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 08:44:45,577 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 08:44:45,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 08:44:45,577 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 08:44:45,578 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 08:44:45,578 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 08:44:46,100 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 08:44:46,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 08:44:46,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 08:44:46,144 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 08:44:46,145 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 08:44:46,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label12.c [2020-10-29 08:44:46,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fb1074ea/353ff5f705564ae18e3da9aaab265b38/FLAGc4a96d069 [2020-10-29 08:44:47,653 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 08:44:47,654 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label12.c [2020-10-29 08:44:47,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fb1074ea/353ff5f705564ae18e3da9aaab265b38/FLAGc4a96d069 [2020-10-29 08:44:47,824 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fb1074ea/353ff5f705564ae18e3da9aaab265b38 [2020-10-29 08:44:47,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 08:44:47,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 08:44:47,841 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 08:44:47,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 08:44:47,847 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 08:44:47,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:44:47" (1/1) ... [2020-10-29 08:44:47,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b41f555 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:44:47, skipping insertion in model container [2020-10-29 08:44:47,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 08:44:47" (1/1) ... [2020-10-29 08:44:47,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 08:44:48,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 08:44:50,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:44:50,579 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 08:44:51,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 08:44:51,976 INFO L208 MainTranslator]: Completed translation [2020-10-29 08:44:51,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:44:51 WrapperNode [2020-10-29 08:44:51,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 08:44:51,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 08:44:51,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 08:44:51,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 08:44:51,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:44:51" (1/1) ... [2020-10-29 08:44:51,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:44:51" (1/1) ... [2020-10-29 08:44:52,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:44:51" (1/1) ... [2020-10-29 08:44:52,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:44:51" (1/1) ... [2020-10-29 08:44:52,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:44:51" (1/1) ... [2020-10-29 08:44:52,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:44:51" (1/1) ... [2020-10-29 08:44:52,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:44:51" (1/1) ... [2020-10-29 08:44:52,871 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 08:44:52,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 08:44:52,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 08:44:52,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 08:44:52,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:44:51" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 08:44:52,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 08:44:52,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 08:44:52,989 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 08:44:52,989 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-29 08:44:52,989 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-29 08:44:52,990 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-29 08:44:52,990 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-29 08:44:52,990 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-29 08:44:52,990 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-29 08:44:52,990 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 08:44:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-29 08:44:52,992 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-29 08:44:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-29 08:44:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-29 08:44:52,993 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-29 08:44:52,994 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-29 08:44:52,995 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 08:44:52,995 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 08:44:52,995 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 08:44:52,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 08:44:52,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 08:44:52,996 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-29 08:44:52,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 08:44:52,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 08:44:52,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 08:44:52,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 08:44:52,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 08:44:52,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 08:44:52,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 08:45:11,183 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 08:45:11,183 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 08:45:11,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:45:11 BoogieIcfgContainer [2020-10-29 08:45:11,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 08:45:11,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 08:45:11,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 08:45:11,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 08:45:11,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 08:44:47" (1/3) ... [2020-10-29 08:45:11,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d072daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:45:11, skipping insertion in model container [2020-10-29 08:45:11,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 08:44:51" (2/3) ... [2020-10-29 08:45:11,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d072daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 08:45:11, skipping insertion in model container [2020-10-29 08:45:11,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 08:45:11" (3/3) ... [2020-10-29 08:45:11,206 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label12.c [2020-10-29 08:45:11,221 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 08:45:11,229 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 08:45:11,241 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 08:45:11,288 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 08:45:11,289 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 08:45:11,289 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 08:45:11,289 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 08:45:11,289 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 08:45:11,289 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 08:45:11,289 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 08:45:11,289 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 08:45:11,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-29 08:45:11,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-29 08:45:11,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:45:11,360 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] [2020-10-29 08:45:11,361 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:45:11,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:45:11,370 INFO L82 PathProgramCache]: Analyzing trace with hash 755214246, now seen corresponding path program 1 times [2020-10-29 08:45:11,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:45:11,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538572257] [2020-10-29 08:45:11,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:45:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:45:11,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:45:12,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:45:12,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-29 08:45:12,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:45:12,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 668 [2020-10-29 08:45:12,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:45:12,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:45:12,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:45:12,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:45:12,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-29 08:45:12,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 08:45:12,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:45:12,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:45:12,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:45:12,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:45:12,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:45:12,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:45:12,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-29 08:45:12,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:45:12,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:45:12,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:45:12,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:45:12,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:45:12,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:45:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:45:12,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538572257] [2020-10-29 08:45:12,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:45:12,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-29 08:45:12,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327175149] [2020-10-29 08:45:12,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 08:45:12,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:45:12,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 08:45:12,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 08:45:12,679 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-29 08:45:47,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:45:47,381 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-29 08:45:47,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 08:45:47,386 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-29 08:45:47,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:45:47,450 INFO L225 Difference]: With dead ends: 5116 [2020-10-29 08:45:47,450 INFO L226 Difference]: Without dead ends: 3271 [2020-10-29 08:45:47,467 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 08:45:47,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-29 08:45:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-29 08:45:47,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-29 08:45:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-29 08:45:47,781 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 51 [2020-10-29 08:45:47,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:45:47,784 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-29 08:45:47,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 08:45:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-29 08:45:47,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-29 08:45:47,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:45:47,810 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:45:47,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 08:45:47,815 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:45:47,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:45:47,816 INFO L82 PathProgramCache]: Analyzing trace with hash -2058951391, now seen corresponding path program 1 times [2020-10-29 08:45:47,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:45:47,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167496105] [2020-10-29 08:45:47,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:45:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:45:47,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:45:48,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:45:49,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:45:49,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-29 08:45:49,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:45:49,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1469 [2020-10-29 08:45:49,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:45:49,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:45:49,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:45:49,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:45:49,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-29 08:45:49,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-29 08:45:49,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:45:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:45:49,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:45:49,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:45:49,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:45:49,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:45:49,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-29 08:45:49,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:45:49,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:45:49,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:45:49,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:45:49,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:45:49,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:45:49,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:45:49,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:45:49,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:45:49,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:45:49,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 08:45:49,907 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:45:49,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-29 08:45:49,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:45:49,908 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:45:49,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:45:49,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:45:49,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-29 08:45:49,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:45:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:45:50,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167496105] [2020-10-29 08:45:50,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:45:50,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:45:50,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567781831] [2020-10-29 08:45:50,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:45:50,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:45:50,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:45:50,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:45:50,076 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 7 states. [2020-10-29 08:45:54,908 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-29 08:46:44,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:46:44,563 INFO L93 Difference]: Finished difference Result 9487 states and 16356 transitions. [2020-10-29 08:46:44,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-29 08:46:44,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-10-29 08:46:44,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:46:44,608 INFO L225 Difference]: With dead ends: 9487 [2020-10-29 08:46:44,609 INFO L226 Difference]: Without dead ends: 6293 [2020-10-29 08:46:44,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-29 08:46:44,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6293 states. [2020-10-29 08:46:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6293 to 6191. [2020-10-29 08:46:44,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6191 states. [2020-10-29 08:46:44,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6191 states to 6191 states and 10270 transitions. [2020-10-29 08:46:44,839 INFO L78 Accepts]: Start accepts. Automaton has 6191 states and 10270 transitions. Word has length 123 [2020-10-29 08:46:44,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:46:44,840 INFO L481 AbstractCegarLoop]: Abstraction has 6191 states and 10270 transitions. [2020-10-29 08:46:44,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:46:44,840 INFO L276 IsEmpty]: Start isEmpty. Operand 6191 states and 10270 transitions. [2020-10-29 08:46:44,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-29 08:46:44,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:46:44,843 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-29 08:46:44,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 08:46:44,844 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:46:44,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:46:44,844 INFO L82 PathProgramCache]: Analyzing trace with hash 1463596494, now seen corresponding path program 1 times [2020-10-29 08:46:44,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:46:44,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434595411] [2020-10-29 08:46:44,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:46:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:46:44,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:45,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:45,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:46,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:46:46,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-29 08:46:46,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:46:46,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1219 [2020-10-29 08:46:46,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:46:46,103 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:46:46,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 08:46:46,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:46:46,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-29 08:46:46,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:46:46,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:46:46,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:46:46,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:46,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:46:46,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:46:46,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:46:46,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-29 08:46:46,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:46:46,270 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:46:46,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:46:46,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:46:46,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:46:46,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:46:46,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:46:46,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:46:46,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:46,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:46:46,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:46:46,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-29 08:46:46,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 08:46:46,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 258 [2020-10-29 08:46:46,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:46:46,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:46:46,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:46:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:46:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-29 08:46:46,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:46:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 08:46:46,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434595411] [2020-10-29 08:46:46,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 08:46:46,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 08:46:46,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695639303] [2020-10-29 08:46:46,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:46:46,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:46:46,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:46:46,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:46:46,707 INFO L87 Difference]: Start difference. First operand 6191 states and 10270 transitions. Second operand 7 states. [2020-10-29 08:47:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 08:47:37,847 INFO L93 Difference]: Finished difference Result 18401 states and 30775 transitions. [2020-10-29 08:47:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-29 08:47:37,850 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 126 [2020-10-29 08:47:37,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 08:47:37,924 INFO L225 Difference]: With dead ends: 18401 [2020-10-29 08:47:37,925 INFO L226 Difference]: Without dead ends: 12216 [2020-10-29 08:47:37,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-29 08:47:37,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12216 states. [2020-10-29 08:47:38,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12216 to 12001. [2020-10-29 08:47:38,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12001 states. [2020-10-29 08:47:38,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12001 states to 12001 states and 17155 transitions. [2020-10-29 08:47:38,348 INFO L78 Accepts]: Start accepts. Automaton has 12001 states and 17155 transitions. Word has length 126 [2020-10-29 08:47:38,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 08:47:38,349 INFO L481 AbstractCegarLoop]: Abstraction has 12001 states and 17155 transitions. [2020-10-29 08:47:38,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-29 08:47:38,349 INFO L276 IsEmpty]: Start isEmpty. Operand 12001 states and 17155 transitions. [2020-10-29 08:47:38,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-29 08:47:38,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 08:47:38,357 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 08:47:38,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 08:47:38,358 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 08:47:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 08:47:38,359 INFO L82 PathProgramCache]: Analyzing trace with hash -980797168, now seen corresponding path program 1 times [2020-10-29 08:47:38,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 08:47:38,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796655512] [2020-10-29 08:47:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 08:47:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:47:38,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:38,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:40,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:40,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:47:40,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-29 08:47:40,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 08:47:40,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2530 [2020-10-29 08:47:40,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:47:40,973 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:47:40,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-29 08:47:40,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-29 08:47:40,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-29 08:47:40,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:47:41,148 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-29 08:47:41,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 08:47:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:47:41,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:41,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:47:41,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 08:47:41,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:47:41,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 08:47:41,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:47:41,172 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:47:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 08:47:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 08:47:41,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-29 08:47:41,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 08:47:41,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-29 08:47:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 08:47:41,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 08:47:41,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 08:47:41,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-29 08:47:41,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 08:47:41,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-29 08:47:41,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 08:47:41,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 08:47:41,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 08:47:41,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-29 08:47:41,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-29 08:47:41,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 08:47:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 08:47:41,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796655512] [2020-10-29 08:47:41,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 08:47:41,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 08:47:41,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392414509] [2020-10-29 08:47:41,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-29 08:47:41,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 08:47:41,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-29 08:47:41,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-29 08:47:41,612 INFO L87 Difference]: Start difference. First operand 12001 states and 17155 transitions. Second operand 7 states. [2020-10-29 08:47:41,803 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 68