/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=BIGGEST --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 -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:03:05,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:03:05,212 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:03:05,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:03:05,253 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:03:05,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:03:05,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:03:05,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:03:05,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:03:05,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:03:05,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:03:05,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:03:05,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:03:05,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:03:05,263 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:03:05,264 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:03:05,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:03:05,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:03:05,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:03:05,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:03:05,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:03:05,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:03:05,273 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:03:05,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:03:05,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:03:05,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:03:05,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:03:05,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:03:05,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:03:05,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:03:05,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:03:05,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:03:05,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:03:05,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:03:05,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:03:05,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:03:05,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:03:05,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:03:05,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:03:05,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:03:05,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:03:05,286 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 [2020-10-12 20:03:05,307 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:03:05,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:03:05,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:03:05,309 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:03:05,309 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:03:05,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:03:05,309 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:03:05,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:03:05,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:03:05,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:03:05,310 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:03:05,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:03:05,311 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:03:05,311 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:03:05,311 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:03:05,311 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:03:05,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:03:05,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:03:05,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:03:05,312 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:03:05,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:03:05,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:03:05,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:03:05,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:03:05,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:03:05,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:03:05,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:03:05,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:03:05,314 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:03:05,314 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 20:03:05,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:03:05,654 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:03:05,657 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:03:05,659 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:03:05,659 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:03:05,660 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-12 20:03:05,735 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9fa266e13/4697066be03840058fb1dc7e7e2690c4/FLAGf048e4bbe [2020-10-12 20:03:06,217 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:03:06,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-12 20:03:06,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9fa266e13/4697066be03840058fb1dc7e7e2690c4/FLAGf048e4bbe [2020-10-12 20:03:06,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9fa266e13/4697066be03840058fb1dc7e7e2690c4 [2020-10-12 20:03:06,552 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:03:06,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:03:06,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:03:06,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:03:06,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:03:06,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:03:06" (1/1) ... [2020-10-12 20:03:06,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a35e781 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:06, skipping insertion in model container [2020-10-12 20:03:06,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:03:06" (1/1) ... [2020-10-12 20:03:06,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:03:06,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:03:06,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:03:07,001 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:03:07,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:03:07,222 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:03:07,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:07 WrapperNode [2020-10-12 20:03:07,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:03:07,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:03:07,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:03:07,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:03:07,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:07" (1/1) ... [2020-10-12 20:03:07,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:07" (1/1) ... [2020-10-12 20:03:07,267 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:07" (1/1) ... [2020-10-12 20:03:07,268 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:07" (1/1) ... [2020-10-12 20:03:07,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:07" (1/1) ... [2020-10-12 20:03:07,324 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:07" (1/1) ... [2020-10-12 20:03:07,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:07" (1/1) ... [2020-10-12 20:03:07,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:03:07,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:03:07,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:03:07,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:03:07,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:07" (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 [2020-10-12 20:03:07,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:03:07,392 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:03:07,392 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:03:07,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:03:07,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:03:07,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:03:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:03:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:03:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:03:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:03:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:03:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:03:07,393 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:03:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:03:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:03:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 20:03:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:03:07,394 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:03:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:03:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:03:07,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:03:08,203 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:03:08,203 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:03:08,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:03:08 BoogieIcfgContainer [2020-10-12 20:03:08,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:03:08,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:03:08,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:03:08,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:03:08,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:03:06" (1/3) ... [2020-10-12 20:03:08,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8d9f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:03:08, skipping insertion in model container [2020-10-12 20:03:08,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:03:07" (2/3) ... [2020-10-12 20:03:08,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8d9f77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:03:08, skipping insertion in model container [2020-10-12 20:03:08,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:03:08" (3/3) ... [2020-10-12 20:03:08,217 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-12 20:03:08,228 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:03:08,236 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:03:08,250 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:03:08,276 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:03:08,276 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:03:08,276 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:03:08,276 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:03:08,277 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:03:08,277 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:03:08,277 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:03:08,277 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:03:08,300 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states. [2020-10-12 20:03:08,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 20:03:08,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:08,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:08,312 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:08,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:08,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1299417404, now seen corresponding path program 1 times [2020-10-12 20:03:08,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:08,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635000629] [2020-10-12 20:03:08,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:08,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:09,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:09,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:10,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:10,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 20:03:10,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:03:10,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1818 [2020-10-12 20:03:10,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:10,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:03:10,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:03:10,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 20:03:10,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 20:03:10,840 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:03:10,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:10,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:10,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:10,862 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:10,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:10,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 20:03:10,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:10,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:03:10,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:10,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:03:10,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:10,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:10,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635000629] [2020-10-12 20:03:10,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:10,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:03:10,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379618900] [2020-10-12 20:03:10,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:03:10,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:10,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:03:10,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:03:10,915 INFO L87 Difference]: Start difference. First operand 185 states. Second operand 7 states. [2020-10-12 20:03:11,162 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-12 20:03:12,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:12,154 INFO L93 Difference]: Finished difference Result 650 states and 1046 transitions. [2020-10-12 20:03:12,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 20:03:12,156 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 20:03:12,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:12,174 INFO L225 Difference]: With dead ends: 650 [2020-10-12 20:03:12,174 INFO L226 Difference]: Without dead ends: 545 [2020-10-12 20:03:12,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:03:12,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-10-12 20:03:12,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 279. [2020-10-12 20:03:12,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-10-12 20:03:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 416 transitions. [2020-10-12 20:03:12,256 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 416 transitions. Word has length 69 [2020-10-12 20:03:12,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:12,257 INFO L479 AbstractCegarLoop]: Abstraction has 279 states and 416 transitions. [2020-10-12 20:03:12,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:03:12,257 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 416 transitions. [2020-10-12 20:03:12,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:03:12,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:12,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:12,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:03:12,261 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:12,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:12,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1350115301, now seen corresponding path program 1 times [2020-10-12 20:03:12,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:12,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444703950] [2020-10-12 20:03:12,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:12,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:12,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:13,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:13,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:03:13,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:03:13,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 821 [2020-10-12 20:03:13,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:13,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:03:13,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 20:03:13,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 20:03:13,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:13,389 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:03:13,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:13,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:13,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:13,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:13,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:13,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-12 20:03:13,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:13,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:03:13,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:13,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:03:13,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:13,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444703950] [2020-10-12 20:03:13,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:13,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:03:13,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222050134] [2020-10-12 20:03:13,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:03:13,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:13,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:03:13,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:03:13,482 INFO L87 Difference]: Start difference. First operand 279 states and 416 transitions. Second operand 7 states. [2020-10-12 20:03:14,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:14,403 INFO L93 Difference]: Finished difference Result 1017 states and 1560 transitions. [2020-10-12 20:03:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:03:14,404 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-10-12 20:03:14,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:14,409 INFO L225 Difference]: With dead ends: 1017 [2020-10-12 20:03:14,409 INFO L226 Difference]: Without dead ends: 805 [2020-10-12 20:03:14,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:03:14,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2020-10-12 20:03:14,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 799. [2020-10-12 20:03:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2020-10-12 20:03:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1215 transitions. [2020-10-12 20:03:14,479 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1215 transitions. Word has length 70 [2020-10-12 20:03:14,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:14,479 INFO L479 AbstractCegarLoop]: Abstraction has 799 states and 1215 transitions. [2020-10-12 20:03:14,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:03:14,480 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1215 transitions. [2020-10-12 20:03:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:03:14,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:14,484 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:14,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:03:14,484 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1026057547, now seen corresponding path program 1 times [2020-10-12 20:03:14,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:14,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823287913] [2020-10-12 20:03:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:14,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:14,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:15,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:15,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:03:15,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:03:15,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 573 [2020-10-12 20:03:15,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:15,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:03:15,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:03:15,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 20:03:15,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:15,361 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:03:15,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:15,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:15,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:15,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:15,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:15,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-12 20:03:15,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:15,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:03:15,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:15,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:03:15,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:15,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823287913] [2020-10-12 20:03:15,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:15,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:03:15,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027966667] [2020-10-12 20:03:15,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:03:15,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:15,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:03:15,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:03:15,440 INFO L87 Difference]: Start difference. First operand 799 states and 1215 transitions. Second operand 6 states. [2020-10-12 20:03:15,621 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 20:03:16,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:16,389 INFO L93 Difference]: Finished difference Result 2015 states and 3107 transitions. [2020-10-12 20:03:16,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:03:16,390 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 20:03:16,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:16,398 INFO L225 Difference]: With dead ends: 2015 [2020-10-12 20:03:16,398 INFO L226 Difference]: Without dead ends: 1321 [2020-10-12 20:03:16,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:03:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2020-10-12 20:03:16,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1319. [2020-10-12 20:03:16,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1319 states. [2020-10-12 20:03:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 2015 transitions. [2020-10-12 20:03:16,489 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 2015 transitions. Word has length 71 [2020-10-12 20:03:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:16,490 INFO L479 AbstractCegarLoop]: Abstraction has 1319 states and 2015 transitions. [2020-10-12 20:03:16,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:03:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 2015 transitions. [2020-10-12 20:03:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:03:16,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:16,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:16,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:03:16,493 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:16,494 INFO L82 PathProgramCache]: Analyzing trace with hash -679908380, now seen corresponding path program 1 times [2020-10-12 20:03:16,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:16,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534841185] [2020-10-12 20:03:16,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:16,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:16,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:17,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:17,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:03:17,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:03:17,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 581 [2020-10-12 20:03:17,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:17,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:03:17,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:03:17,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 20:03:17,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:17,337 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:03:17,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:17,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:17,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:17,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:17,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:17,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-12 20:03:17,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:17,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:03:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:03:17,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:17,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534841185] [2020-10-12 20:03:17,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:17,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:03:17,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635693604] [2020-10-12 20:03:17,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:03:17,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:17,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:03:17,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:03:17,454 INFO L87 Difference]: Start difference. First operand 1319 states and 2015 transitions. Second operand 6 states. [2020-10-12 20:03:17,596 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 20:03:18,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:18,485 INFO L93 Difference]: Finished difference Result 3626 states and 5578 transitions. [2020-10-12 20:03:18,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:03:18,486 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 20:03:18,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:18,498 INFO L225 Difference]: With dead ends: 3626 [2020-10-12 20:03:18,498 INFO L226 Difference]: Without dead ends: 2385 [2020-10-12 20:03:18,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:03:18,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2385 states. [2020-10-12 20:03:18,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2385 to 2383. [2020-10-12 20:03:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2383 states. [2020-10-12 20:03:18,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2383 states to 2383 states and 3637 transitions. [2020-10-12 20:03:18,656 INFO L78 Accepts]: Start accepts. Automaton has 2383 states and 3637 transitions. Word has length 71 [2020-10-12 20:03:18,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:18,656 INFO L479 AbstractCegarLoop]: Abstraction has 2383 states and 3637 transitions. [2020-10-12 20:03:18,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:03:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 2383 states and 3637 transitions. [2020-10-12 20:03:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:03:18,659 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:18,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:18,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:03:18,660 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:18,660 INFO L82 PathProgramCache]: Analyzing trace with hash -474937069, now seen corresponding path program 1 times [2020-10-12 20:03:18,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:18,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782910037] [2020-10-12 20:03:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:18,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:18,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:19,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:19,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:03:19,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:03:19,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 562 [2020-10-12 20:03:19,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:19,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:03:19,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:03:19,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 20:03:19,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:19,425 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:03:19,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:19,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:19,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:19,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:19,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:19,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 20:03:19,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:19,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:03:19,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:19,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:03:19,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:19,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782910037] [2020-10-12 20:03:19,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:19,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:03:19,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327070258] [2020-10-12 20:03:19,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:03:19,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:19,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:03:19,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:03:19,477 INFO L87 Difference]: Start difference. First operand 2383 states and 3637 transitions. Second operand 6 states. [2020-10-12 20:03:19,629 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 20:03:20,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:20,645 INFO L93 Difference]: Finished difference Result 6853 states and 10489 transitions. [2020-10-12 20:03:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:03:20,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 20:03:20,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:20,667 INFO L225 Difference]: With dead ends: 6853 [2020-10-12 20:03:20,667 INFO L226 Difference]: Without dead ends: 4525 [2020-10-12 20:03:20,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:03:20,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4525 states. [2020-10-12 20:03:20,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4525 to 4523. [2020-10-12 20:03:20,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4523 states. [2020-10-12 20:03:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 6866 transitions. [2020-10-12 20:03:20,985 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 6866 transitions. Word has length 71 [2020-10-12 20:03:20,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:20,985 INFO L479 AbstractCegarLoop]: Abstraction has 4523 states and 6866 transitions. [2020-10-12 20:03:20,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:03:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 6866 transitions. [2020-10-12 20:03:20,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:03:20,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:20,988 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:20,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:03:20,989 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:20,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:20,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1749987906, now seen corresponding path program 1 times [2020-10-12 20:03:20,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:20,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662166457] [2020-10-12 20:03:20,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:21,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:21,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:21,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:21,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:03:21,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:03:21,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 486 [2020-10-12 20:03:21,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:21,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:03:21,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:03:21,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 20:03:21,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:21,661 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:03:21,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:21,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:21,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:21,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:21,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:21,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 20:03:21,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:21,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:03:21,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:21,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:03:21,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:21,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662166457] [2020-10-12 20:03:21,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:21,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:03:21,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719203092] [2020-10-12 20:03:21,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:03:21,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:21,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:03:21,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:03:21,706 INFO L87 Difference]: Start difference. First operand 4523 states and 6866 transitions. Second operand 6 states. [2020-10-12 20:03:21,860 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 20:03:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:23,138 INFO L93 Difference]: Finished difference Result 13174 states and 20006 transitions. [2020-10-12 20:03:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:03:23,139 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 20:03:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:23,180 INFO L225 Difference]: With dead ends: 13174 [2020-10-12 20:03:23,180 INFO L226 Difference]: Without dead ends: 8690 [2020-10-12 20:03:23,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:03:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8690 states. [2020-10-12 20:03:23,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8690 to 8688. [2020-10-12 20:03:23,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8688 states. [2020-10-12 20:03:23,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8688 states to 8688 states and 13068 transitions. [2020-10-12 20:03:23,808 INFO L78 Accepts]: Start accepts. Automaton has 8688 states and 13068 transitions. Word has length 71 [2020-10-12 20:03:23,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:23,809 INFO L479 AbstractCegarLoop]: Abstraction has 8688 states and 13068 transitions. [2020-10-12 20:03:23,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:03:23,810 INFO L276 IsEmpty]: Start isEmpty. Operand 8688 states and 13068 transitions. [2020-10-12 20:03:23,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:03:23,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:23,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:23,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:03:23,819 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:23,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:23,819 INFO L82 PathProgramCache]: Analyzing trace with hash -393483888, now seen corresponding path program 1 times [2020-10-12 20:03:23,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:23,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933072275] [2020-10-12 20:03:23,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:23,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:23,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:23,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:26,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:26,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:03:26,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:03:26,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2500 [2020-10-12 20:03:26,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:26,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:03:26,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:03:26,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 20:03:26,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:26,626 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:03:26,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:26,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:26,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:26,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:26,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:26,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 20:03:26,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:26,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:03:26,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:26,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:03:26,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:26,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933072275] [2020-10-12 20:03:26,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:26,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:03:26,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743537169] [2020-10-12 20:03:26,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:03:26,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:26,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:03:26,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:03:26,684 INFO L87 Difference]: Start difference. First operand 8688 states and 13068 transitions. Second operand 11 states. [2020-10-12 20:03:26,983 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-12 20:03:30,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:30,655 INFO L93 Difference]: Finished difference Result 31003 states and 46526 transitions. [2020-10-12 20:03:30,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 20:03:30,656 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-12 20:03:30,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:30,757 INFO L225 Difference]: With dead ends: 31003 [2020-10-12 20:03:30,757 INFO L226 Difference]: Without dead ends: 28664 [2020-10-12 20:03:30,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2020-10-12 20:03:30,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28664 states. [2020-10-12 20:03:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28664 to 8688. [2020-10-12 20:03:31,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8688 states. [2020-10-12 20:03:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8688 states to 8688 states and 13067 transitions. [2020-10-12 20:03:31,693 INFO L78 Accepts]: Start accepts. Automaton has 8688 states and 13067 transitions. Word has length 72 [2020-10-12 20:03:31,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:31,693 INFO L479 AbstractCegarLoop]: Abstraction has 8688 states and 13067 transitions. [2020-10-12 20:03:31,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:03:31,693 INFO L276 IsEmpty]: Start isEmpty. Operand 8688 states and 13067 transitions. [2020-10-12 20:03:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:03:31,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:31,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:31,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:03:31,697 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:31,697 INFO L82 PathProgramCache]: Analyzing trace with hash -924827152, now seen corresponding path program 1 times [2020-10-12 20:03:31,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:31,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637222787] [2020-10-12 20:03:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:31,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:31,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:31,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:33,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:33,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:03:33,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:03:33,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1312 [2020-10-12 20:03:33,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:33,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:03:33,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:03:33,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 20:03:33,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:33,287 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:03:33,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:33,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:33,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:33,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:33,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:33,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 20:03:33,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:03:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:33,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:03:33,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:33,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637222787] [2020-10-12 20:03:33,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:33,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:03:33,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427513966] [2020-10-12 20:03:33,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:03:33,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:33,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:03:33,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:03:33,342 INFO L87 Difference]: Start difference. First operand 8688 states and 13067 transitions. Second operand 11 states. [2020-10-12 20:03:33,540 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 20:03:36,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:36,697 INFO L93 Difference]: Finished difference Result 23909 states and 35990 transitions. [2020-10-12 20:03:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:03:36,698 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-12 20:03:36,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:36,733 INFO L225 Difference]: With dead ends: 23909 [2020-10-12 20:03:36,734 INFO L226 Difference]: Without dead ends: 19541 [2020-10-12 20:03:36,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-10-12 20:03:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19541 states. [2020-10-12 20:03:37,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19541 to 8877. [2020-10-12 20:03:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8877 states. [2020-10-12 20:03:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8877 states to 8877 states and 13319 transitions. [2020-10-12 20:03:37,537 INFO L78 Accepts]: Start accepts. Automaton has 8877 states and 13319 transitions. Word has length 72 [2020-10-12 20:03:37,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:37,538 INFO L479 AbstractCegarLoop]: Abstraction has 8877 states and 13319 transitions. [2020-10-12 20:03:37,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:03:37,538 INFO L276 IsEmpty]: Start isEmpty. Operand 8877 states and 13319 transitions. [2020-10-12 20:03:37,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:03:37,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:37,542 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:37,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:03:37,542 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:37,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:37,543 INFO L82 PathProgramCache]: Analyzing trace with hash -963585456, now seen corresponding path program 1 times [2020-10-12 20:03:37,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:37,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316890923] [2020-10-12 20:03:37,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:37,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:37,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:37,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:37,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:39,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:39,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:03:39,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:03:39,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2020 [2020-10-12 20:03:39,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:39,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:03:39,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:03:39,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 20:03:39,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:39,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:39,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:39,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:39,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:39,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:39,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 20:03:39,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:39,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:03:39,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:39,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:03:39,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:39,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316890923] [2020-10-12 20:03:39,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:39,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:03:39,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093300422] [2020-10-12 20:03:39,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:03:39,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:39,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:03:39,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:03:39,898 INFO L87 Difference]: Start difference. First operand 8877 states and 13319 transitions. Second operand 11 states. [2020-10-12 20:03:40,094 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-12 20:03:44,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:44,684 INFO L93 Difference]: Finished difference Result 42014 states and 62975 transitions. [2020-10-12 20:03:44,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 20:03:44,684 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-12 20:03:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:44,763 INFO L225 Difference]: With dead ends: 42014 [2020-10-12 20:03:44,763 INFO L226 Difference]: Without dead ends: 35605 [2020-10-12 20:03:44,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2020-10-12 20:03:44,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35605 states. [2020-10-12 20:03:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35605 to 9074. [2020-10-12 20:03:45,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9074 states. [2020-10-12 20:03:45,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9074 states to 9074 states and 13570 transitions. [2020-10-12 20:03:45,870 INFO L78 Accepts]: Start accepts. Automaton has 9074 states and 13570 transitions. Word has length 72 [2020-10-12 20:03:45,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:45,871 INFO L479 AbstractCegarLoop]: Abstraction has 9074 states and 13570 transitions. [2020-10-12 20:03:45,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:03:45,871 INFO L276 IsEmpty]: Start isEmpty. Operand 9074 states and 13570 transitions. [2020-10-12 20:03:45,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:03:45,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:45,882 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:45,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:03:45,883 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:45,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1816507056, now seen corresponding path program 1 times [2020-10-12 20:03:45,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:45,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027952414] [2020-10-12 20:03:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:45,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:45,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:46,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:47,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:47,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:03:47,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:03:47,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1520 [2020-10-12 20:03:47,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:47,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:03:47,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:03:47,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 20:03:47,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:47,772 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:03:47,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:47,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:47,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:47,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:47,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:47,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-12 20:03:47,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:03:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:47,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:03:47,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:47,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027952414] [2020-10-12 20:03:47,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:47,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:03:47,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278448847] [2020-10-12 20:03:47,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:03:47,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:47,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:03:47,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:03:47,982 INFO L87 Difference]: Start difference. First operand 9074 states and 13570 transitions. Second operand 11 states. [2020-10-12 20:03:48,259 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-12 20:03:55,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:55,871 INFO L93 Difference]: Finished difference Result 61864 states and 93079 transitions. [2020-10-12 20:03:55,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 20:03:55,871 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-12 20:03:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:55,956 INFO L225 Difference]: With dead ends: 61864 [2020-10-12 20:03:55,956 INFO L226 Difference]: Without dead ends: 53579 [2020-10-12 20:03:55,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=273, Invalid=917, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 20:03:56,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53579 states. [2020-10-12 20:03:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53579 to 9208. [2020-10-12 20:03:57,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9208 states. [2020-10-12 20:03:57,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9208 states to 9208 states and 13714 transitions. [2020-10-12 20:03:57,154 INFO L78 Accepts]: Start accepts. Automaton has 9208 states and 13714 transitions. Word has length 72 [2020-10-12 20:03:57,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:57,155 INFO L479 AbstractCegarLoop]: Abstraction has 9208 states and 13714 transitions. [2020-10-12 20:03:57,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:03:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 9208 states and 13714 transitions. [2020-10-12 20:03:57,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 20:03:57,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:57,158 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:57,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:03:57,158 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:57,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:57,159 INFO L82 PathProgramCache]: Analyzing trace with hash 249417697, now seen corresponding path program 1 times [2020-10-12 20:03:57,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:57,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843796136] [2020-10-12 20:03:57,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:57,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:57,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:57,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 20:03:57,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:57,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 116 [2020-10-12 20:03:57,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:57,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:03:57,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 20:03:57,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 20:03:57,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:57,474 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:03:57,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:57,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:57,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:57,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:57,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:57,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:03:57,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:57,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:03:57,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:57,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:03:57,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:03:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:57,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843796136] [2020-10-12 20:03:57,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:57,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:03:57,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773031624] [2020-10-12 20:03:57,513 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:03:57,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:57,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:03:57,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:03:57,514 INFO L87 Difference]: Start difference. First operand 9208 states and 13714 transitions. Second operand 5 states. [2020-10-12 20:04:00,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:00,492 INFO L93 Difference]: Finished difference Result 17434 states and 26035 transitions. [2020-10-12 20:04:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:04:00,492 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-12 20:04:00,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:00,516 INFO L225 Difference]: With dead ends: 17434 [2020-10-12 20:04:00,516 INFO L226 Difference]: Without dead ends: 17432 [2020-10-12 20:04:00,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:04:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17432 states. [2020-10-12 20:04:01,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17432 to 9464. [2020-10-12 20:04:01,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9464 states. [2020-10-12 20:04:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9464 states to 9464 states and 13970 transitions. [2020-10-12 20:04:01,508 INFO L78 Accepts]: Start accepts. Automaton has 9464 states and 13970 transitions. Word has length 73 [2020-10-12 20:04:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:01,509 INFO L479 AbstractCegarLoop]: Abstraction has 9464 states and 13970 transitions. [2020-10-12 20:04:01,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:04:01,509 INFO L276 IsEmpty]: Start isEmpty. Operand 9464 states and 13970 transitions. [2020-10-12 20:04:01,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:04:01,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:01,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:04:01,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:04:01,515 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:01,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:01,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1893937802, now seen corresponding path program 1 times [2020-10-12 20:04:01,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:01,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088096505] [2020-10-12 20:04:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:01,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:01,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:01,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:01,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:03,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:03,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:04:03,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:04:03,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1660 [2020-10-12 20:04:03,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:03,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:04:03,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:04:03,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 20:04:03,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:03,576 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:04:03,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:03,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:03,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:03,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:03,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:03,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:04:03,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:03,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:04:03,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:03,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:04:03,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 20:04:03,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:04:03,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088096505] [2020-10-12 20:04:03,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:03,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:04:03,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512608413] [2020-10-12 20:04:03,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:04:03,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:03,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:04:03,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:04:03,641 INFO L87 Difference]: Start difference. First operand 9464 states and 13970 transitions. Second operand 10 states. [2020-10-12 20:04:03,836 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-12 20:04:04,204 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-12 20:04:04,340 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-12 20:04:04,489 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-12 20:04:04,649 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-12 20:04:10,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:10,112 INFO L93 Difference]: Finished difference Result 46506 states and 69327 transitions. [2020-10-12 20:04:10,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:04:10,112 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2020-10-12 20:04:10,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:10,153 INFO L225 Difference]: With dead ends: 46506 [2020-10-12 20:04:10,153 INFO L226 Difference]: Without dead ends: 37491 [2020-10-12 20:04:10,168 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-12 20:04:10,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37491 states. [2020-10-12 20:04:11,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37491 to 12125. [2020-10-12 20:04:11,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12125 states. [2020-10-12 20:04:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12125 states to 12125 states and 17936 transitions. [2020-10-12 20:04:11,664 INFO L78 Accepts]: Start accepts. Automaton has 12125 states and 17936 transitions. Word has length 74 [2020-10-12 20:04:11,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:11,664 INFO L479 AbstractCegarLoop]: Abstraction has 12125 states and 17936 transitions. [2020-10-12 20:04:11,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:04:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 12125 states and 17936 transitions. [2020-10-12 20:04:11,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:04:11,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:11,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:04:11,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:04:11,670 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:11,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:11,670 INFO L82 PathProgramCache]: Analyzing trace with hash -581438809, now seen corresponding path program 1 times [2020-10-12 20:04:11,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:11,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055399146] [2020-10-12 20:04:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:11,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:11,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:11,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:04:11,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:11,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-12 20:04:11,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:11,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:04:11,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:04:11,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 20:04:11,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:12,019 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:04:12,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:12,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:12,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:12,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:12,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:12,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:04:12,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:12,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:04:12,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:12,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:04:12,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:04:12,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055399146] [2020-10-12 20:04:12,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:12,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:04:12,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630193000] [2020-10-12 20:04:12,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:04:12,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:12,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:04:12,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:04:12,053 INFO L87 Difference]: Start difference. First operand 12125 states and 17936 transitions. Second operand 5 states. [2020-10-12 20:04:12,241 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-12 20:04:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:16,302 INFO L93 Difference]: Finished difference Result 32241 states and 47774 transitions. [2020-10-12 20:04:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:04:16,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-12 20:04:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:16,323 INFO L225 Difference]: With dead ends: 32241 [2020-10-12 20:04:16,324 INFO L226 Difference]: Without dead ends: 21279 [2020-10-12 20:04:16,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:04:16,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21279 states. [2020-10-12 20:04:18,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21279 to 21277. [2020-10-12 20:04:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21277 states. [2020-10-12 20:04:18,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21277 states to 21277 states and 31208 transitions. [2020-10-12 20:04:18,894 INFO L78 Accepts]: Start accepts. Automaton has 21277 states and 31208 transitions. Word has length 74 [2020-10-12 20:04:18,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:18,894 INFO L479 AbstractCegarLoop]: Abstraction has 21277 states and 31208 transitions. [2020-10-12 20:04:18,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:04:18,894 INFO L276 IsEmpty]: Start isEmpty. Operand 21277 states and 31208 transitions. [2020-10-12 20:04:18,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:04:18,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:18,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:04:18,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:04:18,900 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:18,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:18,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1148287064, now seen corresponding path program 1 times [2020-10-12 20:04:18,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:18,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853747940] [2020-10-12 20:04:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:18,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:18,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:19,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:19,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:20,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:20,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:04:20,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:04:20,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1814 [2020-10-12 20:04:20,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:20,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:04:20,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:04:20,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 20:04:20,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:21,094 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:04:21,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:21,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:21,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:21,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:21,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:21,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:21,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:04:21,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:04:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:04:21,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:04:21,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853747940] [2020-10-12 20:04:21,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:21,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:04:21,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5477202] [2020-10-12 20:04:21,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:04:21,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:21,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:04:21,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:04:21,123 INFO L87 Difference]: Start difference. First operand 21277 states and 31208 transitions. Second operand 10 states. [2020-10-12 20:04:21,284 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 20:04:32,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:32,326 INFO L93 Difference]: Finished difference Result 87754 states and 129219 transitions. [2020-10-12 20:04:32,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 20:04:32,327 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2020-10-12 20:04:32,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:32,401 INFO L225 Difference]: With dead ends: 87754 [2020-10-12 20:04:32,402 INFO L226 Difference]: Without dead ends: 66971 [2020-10-12 20:04:32,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-10-12 20:04:32,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66971 states. [2020-10-12 20:04:36,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66971 to 30994. [2020-10-12 20:04:36,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30994 states. [2020-10-12 20:04:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30994 states to 30994 states and 45487 transitions. [2020-10-12 20:04:36,842 INFO L78 Accepts]: Start accepts. Automaton has 30994 states and 45487 transitions. Word has length 74 [2020-10-12 20:04:36,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:36,842 INFO L479 AbstractCegarLoop]: Abstraction has 30994 states and 45487 transitions. [2020-10-12 20:04:36,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:04:36,842 INFO L276 IsEmpty]: Start isEmpty. Operand 30994 states and 45487 transitions. [2020-10-12 20:04:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:04:36,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:36,846 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:04:36,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:04:36,847 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:36,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:36,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1532926198, now seen corresponding path program 1 times [2020-10-12 20:04:36,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:36,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298634289] [2020-10-12 20:04:36,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:36,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:36,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:37,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:38,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:38,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:04:38,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:04:38,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1578 [2020-10-12 20:04:38,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:38,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:04:38,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:04:38,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 20:04:38,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:39,615 WARN L193 SmtUtils]: Spent 879.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:04:39,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:39,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:39,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:39,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:39,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:39,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:04:39,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:39,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:04:39,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:39,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:04:39,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:04:39,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298634289] [2020-10-12 20:04:39,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:39,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:04:39,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716286108] [2020-10-12 20:04:39,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:04:39,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:39,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:04:39,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:04:39,649 INFO L87 Difference]: Start difference. First operand 30994 states and 45487 transitions. Second operand 10 states. [2020-10-12 20:04:39,834 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-12 20:05:12,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:05:12,195 INFO L93 Difference]: Finished difference Result 200652 states and 295958 transitions. [2020-10-12 20:05:12,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 20:05:12,196 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2020-10-12 20:05:12,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:05:12,521 INFO L225 Difference]: With dead ends: 200652 [2020-10-12 20:05:12,521 INFO L226 Difference]: Without dead ends: 192754 [2020-10-12 20:05:12,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2020-10-12 20:05:12,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192754 states. [2020-10-12 20:05:20,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192754 to 31073. [2020-10-12 20:05:20,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31073 states. [2020-10-12 20:05:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31073 states to 31073 states and 45619 transitions. [2020-10-12 20:05:20,310 INFO L78 Accepts]: Start accepts. Automaton has 31073 states and 45619 transitions. Word has length 74 [2020-10-12 20:05:20,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:05:20,310 INFO L479 AbstractCegarLoop]: Abstraction has 31073 states and 45619 transitions. [2020-10-12 20:05:20,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:05:20,311 INFO L276 IsEmpty]: Start isEmpty. Operand 31073 states and 45619 transitions. [2020-10-12 20:05:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:05:20,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:05:20,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:05:20,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 20:05:20,315 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:05:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:05:20,316 INFO L82 PathProgramCache]: Analyzing trace with hash -926563288, now seen corresponding path program 1 times [2020-10-12 20:05:20,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:05:20,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266226197] [2020-10-12 20:05:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:05:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:20,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:20,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:20,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:21,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:21,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:05:21,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:05:21,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1550 [2020-10-12 20:05:21,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:21,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:05:21,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:05:21,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 20:05:21,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:05:22,221 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:05:22,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:05:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:22,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:22,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:05:22,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:05:22,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:05:22,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:05:22,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:05:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:05:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:05:22,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:05:22,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:05:22,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:05:22,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266226197] [2020-10-12 20:05:22,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:05:22,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:05:22,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572578209] [2020-10-12 20:05:22,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:05:22,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:05:22,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:05:22,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:05:22,251 INFO L87 Difference]: Start difference. First operand 31073 states and 45619 transitions. Second operand 10 states. [2020-10-12 20:05:22,444 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 139 [2020-10-12 20:05:46,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:05:46,726 INFO L93 Difference]: Finished difference Result 139713 states and 205810 transitions. [2020-10-12 20:05:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:05:46,727 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2020-10-12 20:05:46,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:05:46,900 INFO L225 Difference]: With dead ends: 139713 [2020-10-12 20:05:46,901 INFO L226 Difference]: Without dead ends: 115333 [2020-10-12 20:05:46,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:05:47,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115333 states. [2020-10-12 20:05:57,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115333 to 45020. [2020-10-12 20:05:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45020 states. [2020-10-12 20:05:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45020 states to 45020 states and 66062 transitions. [2020-10-12 20:05:57,438 INFO L78 Accepts]: Start accepts. Automaton has 45020 states and 66062 transitions. Word has length 74 [2020-10-12 20:05:57,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:05:57,438 INFO L479 AbstractCegarLoop]: Abstraction has 45020 states and 66062 transitions. [2020-10-12 20:05:57,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:05:57,438 INFO L276 IsEmpty]: Start isEmpty. Operand 45020 states and 66062 transitions. [2020-10-12 20:05:57,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 20:05:57,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:05:57,441 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:05:57,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 20:05:57,442 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:05:57,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:05:57,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2019581273, now seen corresponding path program 1 times [2020-10-12 20:05:57,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:05:57,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830381923] [2020-10-12 20:05:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:05:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:05:57,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:57,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:57,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:57,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:57,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:05:59,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:00,606 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:00,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 20:06:00,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:06:00,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3143 [2020-10-12 20:06:00,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:00,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 20:06:00,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:06:00,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 20:06:00,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:00,936 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:06:00,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:06:00,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:00,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:00,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:00,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:06:00,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:06:00,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:06:00,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:00,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:06:00,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:06:00,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:06:00,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:00,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:06:00,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830381923] [2020-10-12 20:06:00,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:06:00,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 20:06:00,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507472704] [2020-10-12 20:06:00,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 20:06:00,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:06:00,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 20:06:00,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:06:00,966 INFO L87 Difference]: Start difference. First operand 45020 states and 66062 transitions. Second operand 12 states. [2020-10-12 20:06:01,131 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 20:06:24,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:06:24,323 INFO L93 Difference]: Finished difference Result 135741 states and 198339 transitions. [2020-10-12 20:06:24,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 20:06:24,323 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-10-12 20:06:24,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:06:24,447 INFO L225 Difference]: With dead ends: 135741 [2020-10-12 20:06:24,447 INFO L226 Difference]: Without dead ends: 92039 [2020-10-12 20:06:24,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2020-10-12 20:06:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92039 states. [2020-10-12 20:06:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92039 to 69744. [2020-10-12 20:06:40,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69744 states. [2020-10-12 20:06:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69744 states to 69744 states and 102274 transitions. [2020-10-12 20:06:41,023 INFO L78 Accepts]: Start accepts. Automaton has 69744 states and 102274 transitions. Word has length 75 [2020-10-12 20:06:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:06:41,023 INFO L479 AbstractCegarLoop]: Abstraction has 69744 states and 102274 transitions. [2020-10-12 20:06:41,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 20:06:41,023 INFO L276 IsEmpty]: Start isEmpty. Operand 69744 states and 102274 transitions. [2020-10-12 20:06:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 20:06:41,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:06:41,027 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:06:41,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 20:06:41,027 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:06:41,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:06:41,027 INFO L82 PathProgramCache]: Analyzing trace with hash 226966619, now seen corresponding path program 1 times [2020-10-12 20:06:41,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:06:41,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307072560] [2020-10-12 20:06:41,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:06:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:41,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:41,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:41,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:41,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:42,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:42,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-12 20:06:42,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:06:42,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1210 [2020-10-12 20:06:42,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:42,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:06:42,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:06:42,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 20:06:42,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:06:42,542 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:06:42,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:06:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:06:42,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:06:42,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:06:42,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:06:42,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:06:42,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 20:06:42,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:06:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:06:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:06:42,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:06:42,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:06:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:06:42,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307072560] [2020-10-12 20:06:42,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:06:42,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:06:42,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844350686] [2020-10-12 20:06:42,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:06:42,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:06:42,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:06:42,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:06:42,599 INFO L87 Difference]: Start difference. First operand 69744 states and 102274 transitions. Second operand 8 states. [2020-10-12 20:06:42,754 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 134