/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=DEEPEST --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_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:24:36,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:24:36,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:24:36,135 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:24:36,136 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:24:36,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:24:36,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:24:36,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:24:36,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:24:36,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:24:36,146 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:24:36,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:24:36,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:24:36,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:24:36,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:24:36,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:24:36,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:24:36,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:24:36,156 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:24:36,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:24:36,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:24:36,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:24:36,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:24:36,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:24:36,180 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:24:36,181 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:24:36,181 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:24:36,185 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:24:36,185 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:24:36,186 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:24:36,187 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:24:36,188 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:24:36,192 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:24:36,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:24:36,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:24:36,196 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:24:36,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:24:36,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:24:36,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:24:36,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:24:36,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:24:36,202 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 19:24:36,266 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:24:36,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:24:36,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:24:36,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:24:36,268 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:24:36,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:24:36,269 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:24:36,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:24:36,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:24:36,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:24:36,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:24:36,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:24:36,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:24:36,273 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:24:36,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:24:36,273 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:24:36,273 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:24:36,273 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:24:36,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:24:36,274 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:24:36,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:24:36,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:24:36,274 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:24:36,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:24:36,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:24:36,276 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:24:36,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:24:36,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:24:36,276 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:24:36,277 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:24:36,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:24:36,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:24:36,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:24:36,730 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:24:36,731 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:24:36,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem19_label24.c [2020-10-27 19:24:36,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9c0a5298/2a3f1ff733fd4d69a0346346c1448faa/FLAG981151148 [2020-10-27 19:24:38,205 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:24:38,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem19_label24.c [2020-10-27 19:24:38,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9c0a5298/2a3f1ff733fd4d69a0346346c1448faa/FLAG981151148 [2020-10-27 19:24:38,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9c0a5298/2a3f1ff733fd4d69a0346346c1448faa [2020-10-27 19:24:38,371 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:24:38,384 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:24:38,387 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:24:38,387 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:24:38,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:24:38,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:24:38" (1/1) ... [2020-10-27 19:24:38,397 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1df94d86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:24:38, skipping insertion in model container [2020-10-27 19:24:38,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:24:38" (1/1) ... [2020-10-27 19:24:38,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:24:38,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:24:41,025 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:24:41,045 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:24:42,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:24:42,454 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:24:42,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:24:42 WrapperNode [2020-10-27 19:24:42,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:24:42,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:24:42,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:24:42,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:24:42,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:24:42" (1/1) ... [2020-10-27 19:24:42,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:24:42" (1/1) ... [2020-10-27 19:24:42,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:24:42" (1/1) ... [2020-10-27 19:24:42,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:24:42" (1/1) ... [2020-10-27 19:24:42,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:24:42" (1/1) ... [2020-10-27 19:24:43,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:24:42" (1/1) ... [2020-10-27 19:24:43,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:24:42" (1/1) ... [2020-10-27 19:24:43,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:24:43,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:24:43,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:24:43,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:24:43,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:24:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:24:43,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:24:43,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:24:43,344 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:24:43,345 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 19:24:43,345 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 19:24:43,345 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2020-10-27 19:24:43,345 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2020-10-27 19:24:43,345 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2020-10-27 19:24:43,346 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2020-10-27 19:24:43,346 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:24:43,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 19:24:43,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 19:24:43,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2020-10-27 19:24:43,348 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2020-10-27 19:24:43,348 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2020-10-27 19:24:43,349 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2020-10-27 19:24:43,349 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:24:43,349 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:24:43,349 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:24:43,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:24:43,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:24:43,350 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:24:43,350 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:24:43,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:24:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:24:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:24:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:24:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:24:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:24:58,184 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:24:58,185 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:24:58,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:24:58 BoogieIcfgContainer [2020-10-27 19:24:58,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:24:58,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:24:58,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:24:58,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:24:58,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:24:38" (1/3) ... [2020-10-27 19:24:58,202 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f09d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:24:58, skipping insertion in model container [2020-10-27 19:24:58,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:24:42" (2/3) ... [2020-10-27 19:24:58,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64f09d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:24:58, skipping insertion in model container [2020-10-27 19:24:58,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:24:58" (3/3) ... [2020-10-27 19:24:58,205 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label24.c [2020-10-27 19:24:58,221 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:24:58,229 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:24:58,245 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:24:58,314 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:24:58,315 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:24:58,315 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:24:58,315 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:24:58,315 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:24:58,316 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:24:58,316 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:24:58,316 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:24:58,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states. [2020-10-27 19:24:58,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 19:24:58,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:24:58,413 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:24:58,413 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:24:58,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:24:58,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1935912005, now seen corresponding path program 1 times [2020-10-27 19:24:58,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:24:58,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127245711] [2020-10-27 19:24:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:24:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:24:58,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:24:59,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:24:59,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 19:24:59,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:24:59,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 602 [2020-10-27 19:24:59,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:24:59,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:24:59,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 19:24:59,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 19:24:59,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:24:59,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:24:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:24:59,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:24:59,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:24:59,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:24:59,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:24:59,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 19:24:59,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:24:59,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:24:59,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:24:59,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:24:59,608 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:24:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:24:59,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127245711] [2020-10-27 19:24:59,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:24:59,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:24:59,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598783227] [2020-10-27 19:24:59,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:24:59,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:24:59,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:24:59,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:24:59,669 INFO L87 Difference]: Start difference. First operand 1781 states. Second operand 5 states. [2020-10-27 19:25:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:25:31,560 INFO L93 Difference]: Finished difference Result 5092 states and 9568 transitions. [2020-10-27 19:25:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:25:31,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2020-10-27 19:25:31,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:25:31,611 INFO L225 Difference]: With dead ends: 5092 [2020-10-27 19:25:31,611 INFO L226 Difference]: Without dead ends: 3247 [2020-10-27 19:25:31,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:25:31,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2020-10-27 19:25:31,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 3180. [2020-10-27 19:25:31,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3180 states. [2020-10-27 19:25:31,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3180 states to 3180 states and 5851 transitions. [2020-10-27 19:25:31,860 INFO L78 Accepts]: Start accepts. Automaton has 3180 states and 5851 transitions. Word has length 52 [2020-10-27 19:25:31,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:25:31,863 INFO L481 AbstractCegarLoop]: Abstraction has 3180 states and 5851 transitions. [2020-10-27 19:25:31,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:25:31,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3180 states and 5851 transitions. [2020-10-27 19:25:31,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-27 19:25:31,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:25:31,880 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:25:31,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:25:31,881 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:25:31,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:25:31,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2109461394, now seen corresponding path program 1 times [2020-10-27 19:25:31,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:25:31,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464577721] [2020-10-27 19:25:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:25:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:25:32,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:32,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:32,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:32,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:33,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:25:33,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-27 19:25:33,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 19:25:33,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2014 [2020-10-27 19:25:34,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:25:34,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:25:34,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-27 19:25:34,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 19:25:34,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 19:25:34,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:25:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:25:34,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:34,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:25:34,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:25:34,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:25:34,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 19:25:34,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:25:34,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:25:34,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:25:34,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:25:34,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:25:34,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:25:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:25:34,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:34,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:25:34,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:25:34,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 19:25:34,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:25:34,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 19:25:34,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:25:34,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:25:34,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-27 19:25:34,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:25:34,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:25:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:25:34,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464577721] [2020-10-27 19:25:34,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:25:34,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:25:34,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239583239] [2020-10-27 19:25:34,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:25:34,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:25:34,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:25:34,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:25:34,419 INFO L87 Difference]: Start difference. First operand 3180 states and 5851 transitions. Second operand 6 states. [2020-10-27 19:26:34,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:26:34,242 INFO L93 Difference]: Finished difference Result 13510 states and 25476 transitions. [2020-10-27 19:26:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:26:34,246 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 123 [2020-10-27 19:26:34,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:26:34,319 INFO L225 Difference]: With dead ends: 13510 [2020-10-27 19:26:34,320 INFO L226 Difference]: Without dead ends: 10336 [2020-10-27 19:26:34,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:26:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10336 states. [2020-10-27 19:26:34,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10336 to 10267. [2020-10-27 19:26:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10267 states. [2020-10-27 19:26:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10267 states to 10267 states and 15265 transitions. [2020-10-27 19:26:34,707 INFO L78 Accepts]: Start accepts. Automaton has 10267 states and 15265 transitions. Word has length 123 [2020-10-27 19:26:34,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:26:34,710 INFO L481 AbstractCegarLoop]: Abstraction has 10267 states and 15265 transitions. [2020-10-27 19:26:34,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:26:34,710 INFO L276 IsEmpty]: Start isEmpty. Operand 10267 states and 15265 transitions. [2020-10-27 19:26:34,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 19:26:34,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:26:34,721 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:26:34,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:26:34,722 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:26:34,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:26:34,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1644140291, now seen corresponding path program 1 times [2020-10-27 19:26:34,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:26:34,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934871549] [2020-10-27 19:26:34,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:26:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:26:34,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:35,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:35,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:26:35,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-27 19:26:35,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:26:35,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 914 [2020-10-27 19:26:35,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:26:35,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:26:35,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-27 19:26:35,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 19:26:35,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:26:35,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:26:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:26:35,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:35,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:26:35,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:26:35,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:26:35,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:26:35,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:26:35,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:26:35,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:26:35,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:26:35,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:26:35,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:26:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:26:35,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:26:36,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:26:36,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 19:26:36,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:26:36,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-27 19:26:36,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:26:36,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:26:36,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:26:36,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-27 19:26:36,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:26:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:26:36,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934871549] [2020-10-27 19:26:36,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:26:36,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:26:36,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692689482] [2020-10-27 19:26:36,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:26:36,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:26:36,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:26:36,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:26:36,105 INFO L87 Difference]: Start difference. First operand 10267 states and 15265 transitions. Second operand 5 states. [2020-10-27 19:27:22,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:27:22,936 INFO L93 Difference]: Finished difference Result 24766 states and 37963 transitions. [2020-10-27 19:27:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:27:22,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-10-27 19:27:22,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:27:23,030 INFO L225 Difference]: With dead ends: 24766 [2020-10-27 19:27:23,030 INFO L226 Difference]: Without dead ends: 14505 [2020-10-27 19:27:23,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:27:23,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14505 states. [2020-10-27 19:27:23,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14505 to 14500. [2020-10-27 19:27:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14500 states. [2020-10-27 19:27:23,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14500 states to 14500 states and 20932 transitions. [2020-10-27 19:27:23,462 INFO L78 Accepts]: Start accepts. Automaton has 14500 states and 20932 transitions. Word has length 128 [2020-10-27 19:27:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:27:23,463 INFO L481 AbstractCegarLoop]: Abstraction has 14500 states and 20932 transitions. [2020-10-27 19:27:23,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:27:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 14500 states and 20932 transitions. [2020-10-27 19:27:23,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-27 19:27:23,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:27:23,467 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:27:23,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:27:23,467 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:27:23,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:27:23,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2130289281, now seen corresponding path program 1 times [2020-10-27 19:27:23,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:27:23,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789058117] [2020-10-27 19:27:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:27:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:27:23,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:27:23,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:27:24,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:27:25,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:27:25,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-27 19:27:25,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:27:25,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1775 [2020-10-27 19:27:25,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:27:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:27:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 112 [2020-10-27 19:27:25,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:27:25,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:27:25,679 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:27:25,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:27:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:27:25,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:27:25,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:27:25,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:27:25,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:27:25,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 19:27:25,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:27:25,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:27:25,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:27:25,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:27:25,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:27:25,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:27:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:27:25,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:27:25,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:27:25,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 19:27:25,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:27:25,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-27 19:27:25,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:27:25,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:27:25,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:27:25,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 19:27:25,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:27:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:27:26,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789058117] [2020-10-27 19:27:26,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:27:26,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:27:26,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821715193] [2020-10-27 19:27:26,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:27:26,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:27:26,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:27:26,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:27:26,078 INFO L87 Difference]: Start difference. First operand 14500 states and 20932 transitions. Second operand 5 states. [2020-10-27 19:27:27,244 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-27 19:28:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:28:06,092 INFO L93 Difference]: Finished difference Result 29043 states and 41981 transitions. [2020-10-27 19:28:06,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:28:06,096 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2020-10-27 19:28:06,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:28:06,167 INFO L225 Difference]: With dead ends: 29043 [2020-10-27 19:28:06,168 INFO L226 Difference]: Without dead ends: 14504 [2020-10-27 19:28:06,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:28:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14504 states. [2020-10-27 19:28:06,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14504 to 14500. [2020-10-27 19:28:06,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14500 states. [2020-10-27 19:28:06,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14500 states to 14500 states and 20863 transitions. [2020-10-27 19:28:06,622 INFO L78 Accepts]: Start accepts. Automaton has 14500 states and 20863 transitions. Word has length 154 [2020-10-27 19:28:06,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:28:06,625 INFO L481 AbstractCegarLoop]: Abstraction has 14500 states and 20863 transitions. [2020-10-27 19:28:06,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:28:06,625 INFO L276 IsEmpty]: Start isEmpty. Operand 14500 states and 20863 transitions. [2020-10-27 19:28:06,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-27 19:28:06,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:28:06,631 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:28:06,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:28:06,631 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:28:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:28:06,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1384802119, now seen corresponding path program 1 times [2020-10-27 19:28:06,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:28:06,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607773491] [2020-10-27 19:28:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:28:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:28:06,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:28:06,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:28:08,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:28:08,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:28:08,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 19:28:08,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:28:08,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1896 [2020-10-27 19:28:08,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:28:08,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:28:08,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-27 19:28:08,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 19:28:08,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:28:08,800 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 19:28:08,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:28:08,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:28:08,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:28:08,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:28:08,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:28:08,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:28:08,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 19:28:08,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:28:08,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:28:08,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:28:08,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:28:08,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:28:08,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 19:28:08,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:28:08,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:28:09,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:28:09,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 19:28:09,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:28:09,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 203 [2020-10-27 19:28:09,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:28:09,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:28:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:28:09,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-27 19:28:09,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:28:09,188 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:28:09,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607773491] [2020-10-27 19:28:09,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:28:09,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:28:09,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404641753] [2020-10-27 19:28:09,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:28:09,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:28:09,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:28:09,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:28:09,194 INFO L87 Difference]: Start difference. First operand 14500 states and 20863 transitions. Second operand 5 states. [2020-10-27 19:28:10,138 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 66