/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:11:01,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:11:01,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:11:01,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:11:01,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:11:01,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:11:01,919 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:11:01,924 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:11:01,928 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:11:01,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:11:01,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:11:01,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:11:01,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:11:01,943 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:11:01,947 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:11:01,950 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:11:01,951 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:11:01,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:11:01,962 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:11:01,978 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:11:01,980 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:11:01,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:11:01,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:11:01,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:11:01,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:11:01,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:11:01,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:11:01,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:11:01,991 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:11:01,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:11:01,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:11:01,994 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:11:01,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:11:01,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:11:01,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:11:01,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:11:01,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:11:01,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:11:02,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:11:02,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:11:02,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:11:02,004 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 [2020-10-28 14:11:02,035 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:11:02,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:11:02,037 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:11:02,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:11:02,038 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:11:02,038 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:11:02,039 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:11:02,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:11:02,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:11:02,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:11:02,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:11:02,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:11:02,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:11:02,040 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:11:02,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:11:02,041 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:11:02,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:11:02,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:11:02,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:11:02,042 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:11:02,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:11:02,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:11:02,043 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:11:02,043 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:11:02,043 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:11:02,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:11:02,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:11:02,044 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:11:02,044 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:11:02,044 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:11:02,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:11:02,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:11:02,577 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:11:02,579 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:11:02,580 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:11:02,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label33.c [2020-10-28 14:11:02,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03bd85067/e3912f7d9c01464b89fbeb71593b0eec/FLAG6928135c5 [2020-10-28 14:11:04,031 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:11:04,032 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label33.c [2020-10-28 14:11:04,102 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03bd85067/e3912f7d9c01464b89fbeb71593b0eec/FLAG6928135c5 [2020-10-28 14:11:04,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03bd85067/e3912f7d9c01464b89fbeb71593b0eec [2020-10-28 14:11:04,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:11:04,284 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:11:04,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:11:04,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:11:04,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:11:04,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:11:04" (1/1) ... [2020-10-28 14:11:04,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ab50f8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:04, skipping insertion in model container [2020-10-28 14:11:04,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:11:04" (1/1) ... [2020-10-28 14:11:04,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:11:04,650 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:11:07,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:11:07,083 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:11:08,274 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:11:08,333 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:11:08,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:08 WrapperNode [2020-10-28 14:11:08,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:11:08,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:11:08,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:11:08,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:11:08,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:08" (1/1) ... [2020-10-28 14:11:08,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:08" (1/1) ... [2020-10-28 14:11:08,500 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:08" (1/1) ... [2020-10-28 14:11:08,501 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:08" (1/1) ... [2020-10-28 14:11:08,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:08" (1/1) ... [2020-10-28 14:11:08,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:08" (1/1) ... [2020-10-28 14:11:08,857 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:08" (1/1) ... [2020-10-28 14:11:09,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:11:09,087 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:11:09,087 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:11:09,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:11:09,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:08" (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 [2020-10-28 14:11:09,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:11:09,192 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:11:09,193 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:11:09,194 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 14:11:09,194 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-28 14:11:09,194 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-28 14:11:09,195 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-28 14:11:09,195 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-28 14:11:09,242 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-28 14:11:09,242 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:11:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 14:11:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-28 14:11:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-28 14:11:09,242 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-28 14:11:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-28 14:11:09,243 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-28 14:11:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:11:09,244 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:11:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:11:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:11:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:11:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:11:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:11:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:11:09,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:11:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:11:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:11:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:11:09,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:11:25,287 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:11:25,288 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 14:11:25,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:11:25 BoogieIcfgContainer [2020-10-28 14:11:25,294 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:11:25,296 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:11:25,296 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:11:25,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:11:25,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:11:04" (1/3) ... [2020-10-28 14:11:25,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794b3f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:11:25, skipping insertion in model container [2020-10-28 14:11:25,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:11:08" (2/3) ... [2020-10-28 14:11:25,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@794b3f00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:11:25, skipping insertion in model container [2020-10-28 14:11:25,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:11:25" (3/3) ... [2020-10-28 14:11:25,305 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label33.c [2020-10-28 14:11:25,320 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:11:25,329 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:11:25,348 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:11:25,399 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:11:25,399 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:11:25,399 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:11:25,400 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:11:25,400 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:11:25,400 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:11:25,400 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:11:25,400 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:11:25,458 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-28 14:11:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:11:25,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:11:25,469 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] [2020-10-28 14:11:25,470 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:11:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:11:25,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1733876235, now seen corresponding path program 1 times [2020-10-28 14:11:25,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:11:25,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105572495] [2020-10-28 14:11:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:11:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:25,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:26,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:26,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:11:26,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:11:26,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 722 [2020-10-28 14:11:26,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:26,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:26,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:11:26,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:11:26,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 14:11:26,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:11:26,841 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:11:26,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:11:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:11:26,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:11:26,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:11:26,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:11:26,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:11:26,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 14:11:26,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:11:26,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:11:26,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:11:26,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:11:26,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:11:26,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:11:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:11:26,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105572495] [2020-10-28 14:11:26,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:11:26,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 14:11:26,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479670379] [2020-10-28 14:11:26,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:11:26,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:11:26,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:11:26,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:11:26,954 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 4 states. [2020-10-28 14:12:02,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:12:02,228 INFO L93 Difference]: Finished difference Result 5116 states and 9607 transitions. [2020-10-28 14:12:02,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:12:02,231 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-10-28 14:12:02,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:12:02,283 INFO L225 Difference]: With dead ends: 5116 [2020-10-28 14:12:02,283 INFO L226 Difference]: Without dead ends: 3271 [2020-10-28 14:12:02,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:12:02,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3271 states. [2020-10-28 14:12:02,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3271 to 3200. [2020-10-28 14:12:02,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3200 states. [2020-10-28 14:12:02,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3200 states to 3200 states and 5484 transitions. [2020-10-28 14:12:02,553 INFO L78 Accepts]: Start accepts. Automaton has 3200 states and 5484 transitions. Word has length 48 [2020-10-28 14:12:02,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:12:02,554 INFO L481 AbstractCegarLoop]: Abstraction has 3200 states and 5484 transitions. [2020-10-28 14:12:02,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:12:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 3200 states and 5484 transitions. [2020-10-28 14:12:02,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 14:12:02,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:12:02,561 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:12:02,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:12:02,562 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:12:02,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:12:02,563 INFO L82 PathProgramCache]: Analyzing trace with hash -371368645, now seen corresponding path program 1 times [2020-10-28 14:12:02,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:12:02,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915416015] [2020-10-28 14:12:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:12:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:02,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:03,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:03,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:03,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 14:12:03,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:12:03,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1223 [2020-10-28 14:12:03,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:03,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:03,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:12:03,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:12:03,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 14:12:03,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:12:04,035 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:12:04,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:12:04,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:04,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:04,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:04,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:12:04,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:12:04,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-28 14:12:04,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:04,098 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:04,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:12:04,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:12:04,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:12:04,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:12:04,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:12:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:04,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:04,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:04,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 14:12:04,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:12:04,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 156 [2020-10-28 14:12:04,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:04,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:04,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:12:04,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:12:04,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 14:12:04,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:12:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:12:04,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915416015] [2020-10-28 14:12:04,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:12:04,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:12:04,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816362298] [2020-10-28 14:12:04,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:12:04,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:12:04,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:12:04,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:12:04,438 INFO L87 Difference]: Start difference. First operand 3200 states and 5484 transitions. Second operand 7 states. [2020-10-28 14:12:49,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:12:49,629 INFO L93 Difference]: Finished difference Result 9523 states and 16481 transitions. [2020-10-28 14:12:49,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:12:49,632 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 120 [2020-10-28 14:12:49,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:12:49,674 INFO L225 Difference]: With dead ends: 9523 [2020-10-28 14:12:49,675 INFO L226 Difference]: Without dead ends: 6329 [2020-10-28 14:12:49,686 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 [2020-10-28 14:12:49,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2020-10-28 14:12:49,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 6215. [2020-10-28 14:12:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6215 states. [2020-10-28 14:12:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6215 states to 6215 states and 10300 transitions. [2020-10-28 14:12:49,935 INFO L78 Accepts]: Start accepts. Automaton has 6215 states and 10300 transitions. Word has length 120 [2020-10-28 14:12:49,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:12:49,938 INFO L481 AbstractCegarLoop]: Abstraction has 6215 states and 10300 transitions. [2020-10-28 14:12:49,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:12:49,938 INFO L276 IsEmpty]: Start isEmpty. Operand 6215 states and 10300 transitions. [2020-10-28 14:12:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-28 14:12:49,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:12:49,941 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:12:49,942 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:12:49,942 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:12:49,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:12:49,943 INFO L82 PathProgramCache]: Analyzing trace with hash 2136213068, now seen corresponding path program 1 times [2020-10-28 14:12:49,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:12:49,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787779247] [2020-10-28 14:12:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:12:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:50,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:50,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:50,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:51,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:51,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-28 14:12:51,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:12:51,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1458 [2020-10-28 14:12:51,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:51,441 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:51,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:12:51,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:12:51,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-28 14:12:51,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:12:51,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:12:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:51,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:51,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:51,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:12:51,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:12:51,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 14:12:51,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:51,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:51,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:12:51,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:12:51,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:12:51,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:12:51,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:12:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:12:51,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:12:51,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:12:51,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 14:12:51,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:12:51,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-28 14:12:51,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:12:51,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:12:51,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:12:51,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:12:51,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-28 14:12:51,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:12:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:12:52,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787779247] [2020-10-28 14:12:52,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:12:52,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:12:52,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358416968] [2020-10-28 14:12:52,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:12:52,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:12:52,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:12:52,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:12:52,034 INFO L87 Difference]: Start difference. First operand 6215 states and 10300 transitions. Second operand 7 states. [2020-10-28 14:13:43,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:13:43,487 INFO L93 Difference]: Finished difference Result 18630 states and 31139 transitions. [2020-10-28 14:13:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:13:43,489 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-10-28 14:13:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:13:43,560 INFO L225 Difference]: With dead ends: 18630 [2020-10-28 14:13:43,561 INFO L226 Difference]: Without dead ends: 12421 [2020-10-28 14:13:43,580 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 [2020-10-28 14:13:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12421 states. [2020-10-28 14:13:43,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12421 to 12057. [2020-10-28 14:13:43,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12057 states. [2020-10-28 14:13:43,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12057 states to 12057 states and 17253 transitions. [2020-10-28 14:13:43,910 INFO L78 Accepts]: Start accepts. Automaton has 12057 states and 17253 transitions. Word has length 123 [2020-10-28 14:13:43,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:13:43,913 INFO L481 AbstractCegarLoop]: Abstraction has 12057 states and 17253 transitions. [2020-10-28 14:13:43,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:13:43,914 INFO L276 IsEmpty]: Start isEmpty. Operand 12057 states and 17253 transitions. [2020-10-28 14:13:43,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 14:13:43,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:13:43,917 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:13:43,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:13:43,917 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:13:43,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:13:43,918 INFO L82 PathProgramCache]: Analyzing trace with hash -691918454, now seen corresponding path program 1 times [2020-10-28 14:13:43,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:13:43,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549550943] [2020-10-28 14:13:43,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:13:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:43,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:44,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:44,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:45,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:45,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 14:13:45,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:13:45,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1947 [2020-10-28 14:13:45,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:45,909 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:45,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:13:45,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:13:45,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-28 14:13:45,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:13:46,089 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:13:46,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:13:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:46,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:46,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:46,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:13:46,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:13:46,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 14:13:46,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:46,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:46,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:13:46,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:13:46,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:13:46,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:13:46,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:13:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:13:46,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:13:46,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:13:46,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-28 14:13:46,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:13:46,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-10-28 14:13:46,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:13:46,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:13:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:13:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:13:46,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-28 14:13:46,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:13:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:13:46,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549550943] [2020-10-28 14:13:46,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:13:46,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:13:46,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468280308] [2020-10-28 14:13:46,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:13:46,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:13:46,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:13:46,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:13:46,537 INFO L87 Difference]: Start difference. First operand 12057 states and 17253 transitions. Second operand 7 states. [2020-10-28 14:13:46,709 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 14:14:54,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:14:54,264 INFO L93 Difference]: Finished difference Result 36884 states and 53816 transitions. [2020-10-28 14:14:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:14:54,269 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 149 [2020-10-28 14:14:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:14:54,379 INFO L225 Difference]: With dead ends: 36884 [2020-10-28 14:14:54,379 INFO L226 Difference]: Without dead ends: 24833 [2020-10-28 14:14:54,415 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 [2020-10-28 14:14:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24833 states. [2020-10-28 14:14:55,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24833 to 24130. [2020-10-28 14:14:55,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24130 states. [2020-10-28 14:14:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24130 states to 24130 states and 31240 transitions. [2020-10-28 14:14:55,070 INFO L78 Accepts]: Start accepts. Automaton has 24130 states and 31240 transitions. Word has length 149 [2020-10-28 14:14:55,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:14:55,072 INFO L481 AbstractCegarLoop]: Abstraction has 24130 states and 31240 transitions. [2020-10-28 14:14:55,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:14:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 24130 states and 31240 transitions. [2020-10-28 14:14:55,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-28 14:14:55,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:14:55,082 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:14:55,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:14:55,083 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:14:55,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:14:55,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1028823294, now seen corresponding path program 1 times [2020-10-28 14:14:55,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:14:55,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468416198] [2020-10-28 14:14:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:14:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:55,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:55,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:57,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:57,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 276 [2020-10-28 14:14:57,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:14:57,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1960 [2020-10-28 14:14:57,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:57,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:57,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:14:57,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 14:14:57,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 220 [2020-10-28 14:14:57,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:14:57,345 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-28 14:14:57,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:14:57,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:57,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:57,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:57,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:14:57,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:14:57,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 14:14:57,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:57,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:57,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:14:57,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:14:57,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:14:57,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:14:57,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 14:14:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:14:57,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:14:57,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:14:57,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-28 14:14:57,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:14:57,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 364 [2020-10-28 14:14:57,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:14:57,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:14:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:14:57,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 14:14:57,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-28 14:14:57,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:14:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:14:58,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468416198] [2020-10-28 14:14:58,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:14:58,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:14:58,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841291067] [2020-10-28 14:14:58,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:14:58,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:14:58,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:14:58,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:14:58,378 INFO L87 Difference]: Start difference. First operand 24130 states and 31240 transitions. Second operand 7 states. [2020-10-28 14:14:58,607 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-28 14:15:03,708 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 66