/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:47:40,244 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:47:40,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:47:40,291 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:47:40,291 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:47:40,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:47:40,303 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:47:40,304 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:47:40,306 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:47:40,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:47:40,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:47:40,309 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:47:40,309 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:47:40,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:47:40,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:47:40,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:47:40,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:47:40,313 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:47:40,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:47:40,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:47:40,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:47:40,319 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:47:40,320 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:47:40,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:47:40,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:47:40,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:47:40,324 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:47:40,327 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:47:40,328 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:47:40,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:47:40,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:47:40,330 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:47:40,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:47:40,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:47:40,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:47:40,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:47:40,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:47:40,333 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:47:40,333 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:47:40,334 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:47:40,335 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:47:40,336 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 [2020-10-14 08:47:40,358 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:47:40,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:47:40,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:47:40,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:47:40,360 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:47:40,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:47:40,360 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:47:40,360 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:47:40,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:47:40,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:47:40,361 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:47:40,361 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:47:40,361 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:47:40,361 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:47:40,362 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:47:40,362 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:47:40,362 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:47:40,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:47:40,363 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:47:40,363 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:47:40,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:47:40,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:47:40,363 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:47:40,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:47:40,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:47:40,364 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:47:40,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:47:40,364 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:47:40,365 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:47:40,365 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 08:47:40,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:47:40,658 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:47:40,661 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:47:40,663 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:47:40,663 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:47:40,664 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:47:40,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/757bc361e/46a07de1900f4bb1b3ab29a67fda2ee0/FLAG68a275b0d [2020-10-14 08:47:41,214 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:47:41,215 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:47:41,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/757bc361e/46a07de1900f4bb1b3ab29a67fda2ee0/FLAG68a275b0d [2020-10-14 08:47:41,538 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/757bc361e/46a07de1900f4bb1b3ab29a67fda2ee0 [2020-10-14 08:47:41,548 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:47:41,550 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:47:41,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:47:41,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:47:41,556 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:47:41,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:47:41" (1/1) ... [2020-10-14 08:47:41,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a65ceb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:47:41, skipping insertion in model container [2020-10-14 08:47:41,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:47:41" (1/1) ... [2020-10-14 08:47:41,569 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:47:41,627 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:47:41,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:47:42,025 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:47:42,201 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:47:42,223 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:47:42,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:47:42 WrapperNode [2020-10-14 08:47:42,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:47:42,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:47:42,225 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:47:42,225 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:47:42,240 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:47:42" (1/1) ... [2020-10-14 08:47:42,240 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:47:42" (1/1) ... [2020-10-14 08:47:42,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:47:42" (1/1) ... [2020-10-14 08:47:42,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:47:42" (1/1) ... [2020-10-14 08:47:42,265 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:47:42" (1/1) ... [2020-10-14 08:47:42,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:47:42" (1/1) ... [2020-10-14 08:47:42,285 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:47:42" (1/1) ... [2020-10-14 08:47:42,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:47:42,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:47:42,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:47:42,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:47:42,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:47:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:47:42,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:47:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:47:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:47:42,357 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:47:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:47:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:47:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:47:42,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 08:47:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:47:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:47:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:47:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:47:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:47:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:47:42,358 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:47:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:47:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 08:47:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-14 08:47:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:47:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:47:42,359 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:47:42,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:47:42,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:47:43,094 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:47:43,095 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:47:43,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:47:43 BoogieIcfgContainer [2020-10-14 08:47:43,100 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:47:43,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:47:43,102 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:47:43,105 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:47:43,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:47:41" (1/3) ... [2020-10-14 08:47:43,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1b3628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:47:43, skipping insertion in model container [2020-10-14 08:47:43,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:47:42" (2/3) ... [2020-10-14 08:47:43,107 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f1b3628 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:47:43, skipping insertion in model container [2020-10-14 08:47:43,107 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:47:43" (3/3) ... [2020-10-14 08:47:43,109 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:47:43,121 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:47:43,130 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:47:43,145 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:47:43,171 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:47:43,171 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:47:43,171 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:47:43,171 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:47:43,172 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:47:43,173 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:47:43,173 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:47:43,173 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:47:43,193 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states. [2020-10-14 08:47:43,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 08:47:43,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:47:43,204 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] [2020-10-14 08:47:43,205 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:47:43,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:47:43,210 INFO L82 PathProgramCache]: Analyzing trace with hash 820544625, now seen corresponding path program 1 times [2020-10-14 08:47:43,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:47:43,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182613876] [2020-10-14 08:47:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:47:43,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:47:43,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:43,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:43,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:44,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:44,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:46,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:48,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:47:48,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 08:47:48,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:47:48,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 08:47:48,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:47:48,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:47:48,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:47:48,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:47:48,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 08:47:48,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 08:47:48,834 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:47:48,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:47:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:47:48,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:48,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:47:48,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:47:48,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:47:48,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 08:47:48,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:47:48,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:47:48,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:47:48,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:47:48,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:47:48,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:47:48,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:47:48,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182613876] [2020-10-14 08:47:48,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:47:48,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:47:48,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537412465] [2020-10-14 08:47:48,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:47:48,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:47:48,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:47:48,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:47:48,915 INFO L87 Difference]: Start difference. First operand 104 states. Second operand 4 states. [2020-10-14 08:47:49,131 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-14 08:47:49,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:47:49,940 INFO L93 Difference]: Finished difference Result 228 states and 363 transitions. [2020-10-14 08:47:49,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:47:49,942 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-14 08:47:49,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:47:49,956 INFO L225 Difference]: With dead ends: 228 [2020-10-14 08:47:49,957 INFO L226 Difference]: Without dead ends: 154 [2020-10-14 08:47:49,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:47:49,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-14 08:47:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2020-10-14 08:47:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-14 08:47:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 219 transitions. [2020-10-14 08:47:50,022 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 219 transitions. Word has length 64 [2020-10-14 08:47:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:47:50,022 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 219 transitions. [2020-10-14 08:47:50,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:47:50,023 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 219 transitions. [2020-10-14 08:47:50,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 08:47:50,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:47:50,026 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] [2020-10-14 08:47:50,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:47:50,026 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:47:50,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:47:50,027 INFO L82 PathProgramCache]: Analyzing trace with hash -440696837, now seen corresponding path program 1 times [2020-10-14 08:47:50,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:47:50,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566704801] [2020-10-14 08:47:50,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:47:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:47:50,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:50,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:50,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:50,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:50,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:50,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:54,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:55,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:47:55,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 08:47:55,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:47:55,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 08:47:55,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:47:55,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:47:55,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:47:55,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 08:47:55,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 08:47:55,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-14 08:47:55,288 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:47:55,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:47:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:47:55,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:55,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:47:55,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:47:55,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:47:55,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:47:55,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:47:55,306 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:47:55,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:47:55,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:47:55,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:47:55,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:47:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:47:55,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566704801] [2020-10-14 08:47:55,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:47:55,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:47:55,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824965029] [2020-10-14 08:47:55,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:47:55,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:47:55,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:47:55,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:47:55,331 INFO L87 Difference]: Start difference. First operand 152 states and 219 transitions. Second operand 4 states. [2020-10-14 08:47:55,560 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-14 08:47:55,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:47:55,964 INFO L93 Difference]: Finished difference Result 364 states and 555 transitions. [2020-10-14 08:47:55,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:47:55,964 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-14 08:47:55,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:47:55,967 INFO L225 Difference]: With dead ends: 364 [2020-10-14 08:47:55,968 INFO L226 Difference]: Without dead ends: 250 [2020-10-14 08:47:55,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:47:55,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-14 08:47:55,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 248. [2020-10-14 08:47:55,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-14 08:47:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 371 transitions. [2020-10-14 08:47:55,997 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 371 transitions. Word has length 65 [2020-10-14 08:47:55,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:47:55,998 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 371 transitions. [2020-10-14 08:47:55,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:47:55,998 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 371 transitions. [2020-10-14 08:47:56,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 08:47:56,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:47:56,000 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] [2020-10-14 08:47:56,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:47:56,001 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:47:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:47:56,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1322173, now seen corresponding path program 1 times [2020-10-14 08:47:56,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:47:56,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087691063] [2020-10-14 08:47:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:47:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:47:56,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:56,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:56,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:56,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:56,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:47:58,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:01,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:01,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 08:48:01,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:48:01,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:48:01,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:01,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:01,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:48:01,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-14 08:48:01,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 08:48:01,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:48:01,332 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:48:01,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:48:01,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:01,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:01,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:01,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:48:01,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:01,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 08:48:01,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:01,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:01,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:48:01,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:48:01,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:48:01,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:48:01,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:48:01,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087691063] [2020-10-14 08:48:01,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:48:01,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:48:01,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210884394] [2020-10-14 08:48:01,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:48:01,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:48:01,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:48:01,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:48:01,381 INFO L87 Difference]: Start difference. First operand 248 states and 371 transitions. Second operand 4 states. [2020-10-14 08:48:01,589 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-14 08:48:02,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:48:02,058 INFO L93 Difference]: Finished difference Result 636 states and 985 transitions. [2020-10-14 08:48:02,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:48:02,059 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-14 08:48:02,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:48:02,062 INFO L225 Difference]: With dead ends: 636 [2020-10-14 08:48:02,062 INFO L226 Difference]: Without dead ends: 426 [2020-10-14 08:48:02,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:48:02,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-10-14 08:48:02,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 424. [2020-10-14 08:48:02,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-10-14 08:48:02,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 647 transitions. [2020-10-14 08:48:02,099 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 647 transitions. Word has length 66 [2020-10-14 08:48:02,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:48:02,100 INFO L479 AbstractCegarLoop]: Abstraction has 424 states and 647 transitions. [2020-10-14 08:48:02,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:48:02,100 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 647 transitions. [2020-10-14 08:48:02,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:48:02,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:48:02,102 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] [2020-10-14 08:48:02,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:48:02,102 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:48:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:48:02,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1904871801, now seen corresponding path program 1 times [2020-10-14 08:48:02,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:48:02,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166782199] [2020-10-14 08:48:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:48:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:02,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:02,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:02,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:02,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:02,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:02,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:02,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:06,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:07,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:07,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:48:07,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:48:07,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:48:07,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:07,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:07,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:48:07,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 08:48:07,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 08:48:07,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:48:07,310 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:48:07,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:48:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:07,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:07,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:07,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:48:07,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:07,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 08:48:07,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:07,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:07,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:48:07,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:48:07,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:48:07,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:48:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:48:07,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166782199] [2020-10-14 08:48:07,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:48:07,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:48:07,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812400282] [2020-10-14 08:48:07,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:48:07,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:48:07,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:48:07,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:48:07,349 INFO L87 Difference]: Start difference. First operand 424 states and 647 transitions. Second operand 4 states. [2020-10-14 08:48:07,529 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-14 08:48:07,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:48:07,953 INFO L93 Difference]: Finished difference Result 1132 states and 1761 transitions. [2020-10-14 08:48:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:48:07,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 08:48:07,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:48:07,958 INFO L225 Difference]: With dead ends: 1132 [2020-10-14 08:48:07,958 INFO L226 Difference]: Without dead ends: 746 [2020-10-14 08:48:07,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:48:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2020-10-14 08:48:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 744. [2020-10-14 08:48:07,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-10-14 08:48:07,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1143 transitions. [2020-10-14 08:48:07,997 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1143 transitions. Word has length 67 [2020-10-14 08:48:07,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:48:07,998 INFO L479 AbstractCegarLoop]: Abstraction has 744 states and 1143 transitions. [2020-10-14 08:48:07,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:48:07,998 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1143 transitions. [2020-10-14 08:48:07,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 08:48:07,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:48:07,999 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] [2020-10-14 08:48:08,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:48:08,000 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:48:08,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:48:08,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1555803115, now seen corresponding path program 1 times [2020-10-14 08:48:08,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:48:08,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011485595] [2020-10-14 08:48:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:48:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:08,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:08,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:08,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:08,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:08,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:08,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:10,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:13,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:13,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 08:48:13,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:48:13,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 08:48:13,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:13,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:13,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:48:13,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:48:13,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 08:48:13,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:48:13,238 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:48:13,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:48:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:13,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:13,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:13,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:48:13,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:13,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 08:48:13,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:13,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:13,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:48:13,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:48:13,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:48:13,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:48:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:48:13,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011485595] [2020-10-14 08:48:13,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:48:13,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:48:13,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707223236] [2020-10-14 08:48:13,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:48:13,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:48:13,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:48:13,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:48:13,296 INFO L87 Difference]: Start difference. First operand 744 states and 1143 transitions. Second operand 6 states. [2020-10-14 08:48:13,551 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-14 08:48:14,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:48:14,132 INFO L93 Difference]: Finished difference Result 1450 states and 2248 transitions. [2020-10-14 08:48:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:48:14,137 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-14 08:48:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:48:14,146 INFO L225 Difference]: With dead ends: 1450 [2020-10-14 08:48:14,147 INFO L226 Difference]: Without dead ends: 744 [2020-10-14 08:48:14,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:48:14,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-14 08:48:14,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2020-10-14 08:48:14,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-10-14 08:48:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1135 transitions. [2020-10-14 08:48:14,240 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1135 transitions. Word has length 68 [2020-10-14 08:48:14,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:48:14,240 INFO L479 AbstractCegarLoop]: Abstraction has 744 states and 1135 transitions. [2020-10-14 08:48:14,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:48:14,241 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1135 transitions. [2020-10-14 08:48:14,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 08:48:14,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:48:14,246 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] [2020-10-14 08:48:14,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:48:14,247 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:48:14,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:48:14,247 INFO L82 PathProgramCache]: Analyzing trace with hash 897133648, now seen corresponding path program 1 times [2020-10-14 08:48:14,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:48:14,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341671802] [2020-10-14 08:48:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:48:14,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:14,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:14,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:14,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:14,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:16,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:16,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 08:48:16,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:48:16,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1828 [2020-10-14 08:48:16,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:16,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:16,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:48:16,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:48:16,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 08:48:16,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:48:16,317 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:48:16,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:48:16,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:16,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:16,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:16,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:48:16,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:16,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-14 08:48:16,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:16,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:16,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:48:16,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:48:16,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:48:16,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:48:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:48:16,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341671802] [2020-10-14 08:48:16,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:48:16,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:48:16,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869972316] [2020-10-14 08:48:16,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:48:16,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:48:16,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:48:16,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:48:16,380 INFO L87 Difference]: Start difference. First operand 744 states and 1135 transitions. Second operand 6 states. [2020-10-14 08:48:16,602 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-14 08:48:17,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:48:17,195 INFO L93 Difference]: Finished difference Result 2148 states and 3313 transitions. [2020-10-14 08:48:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:48:17,196 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-14 08:48:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:48:17,204 INFO L225 Difference]: With dead ends: 2148 [2020-10-14 08:48:17,204 INFO L226 Difference]: Without dead ends: 1442 [2020-10-14 08:48:17,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:48:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442 states. [2020-10-14 08:48:17,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442 to 1440. [2020-10-14 08:48:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1440 states. [2020-10-14 08:48:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 2207 transitions. [2020-10-14 08:48:17,311 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 2207 transitions. Word has length 68 [2020-10-14 08:48:17,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:48:17,311 INFO L479 AbstractCegarLoop]: Abstraction has 1440 states and 2207 transitions. [2020-10-14 08:48:17,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:48:17,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 2207 transitions. [2020-10-14 08:48:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 08:48:17,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:48:17,312 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] [2020-10-14 08:48:17,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:48:17,313 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:48:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:48:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash -566937909, now seen corresponding path program 1 times [2020-10-14 08:48:17,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:48:17,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623083442] [2020-10-14 08:48:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:48:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:17,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:17,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:17,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:17,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 08:48:17,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 08:48:17,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 523 [2020-10-14 08:48:17,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:17,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:17,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:48:17,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:48:17,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 08:48:17,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:48:18,013 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:48:18,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:48:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:18,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:18,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:18,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:48:18,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:18,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 08:48:18,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:18,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:18,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:48:18,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:48:18,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:48:18,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:48:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:48:18,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623083442] [2020-10-14 08:48:18,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:48:18,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:48:18,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801849156] [2020-10-14 08:48:18,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:48:18,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:48:18,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:48:18,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:48:18,063 INFO L87 Difference]: Start difference. First operand 1440 states and 2207 transitions. Second operand 6 states. [2020-10-14 08:48:18,219 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-14 08:48:18,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:48:18,839 INFO L93 Difference]: Finished difference Result 4212 states and 6481 transitions. [2020-10-14 08:48:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:48:18,840 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-14 08:48:18,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:48:18,855 INFO L225 Difference]: With dead ends: 4212 [2020-10-14 08:48:18,855 INFO L226 Difference]: Without dead ends: 2810 [2020-10-14 08:48:18,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:48:18,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2810 states. [2020-10-14 08:48:19,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2810 to 2808. [2020-10-14 08:48:19,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2808 states. [2020-10-14 08:48:19,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 4279 transitions. [2020-10-14 08:48:19,074 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 4279 transitions. Word has length 68 [2020-10-14 08:48:19,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:48:19,075 INFO L479 AbstractCegarLoop]: Abstraction has 2808 states and 4279 transitions. [2020-10-14 08:48:19,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:48:19,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 4279 transitions. [2020-10-14 08:48:19,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 08:48:19,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:48:19,082 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] [2020-10-14 08:48:19,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:48:19,082 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:48:19,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:48:19,083 INFO L82 PathProgramCache]: Analyzing trace with hash 760447280, now seen corresponding path program 1 times [2020-10-14 08:48:19,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:48:19,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928786345] [2020-10-14 08:48:19,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:48:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:19,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:19,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:19,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 08:48:19,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:19,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 165 [2020-10-14 08:48:19,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:19,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:19,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 08:48:19,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:48:19,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 08:48:19,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:48:19,485 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:48:19,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:48:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:19,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:19,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:19,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:48:19,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:19,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:48:19,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:19,501 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:19,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:48:19,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:48:19,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:48:19,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:48:19,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:48:19,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928786345] [2020-10-14 08:48:19,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:48:19,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 08:48:19,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906770811] [2020-10-14 08:48:19,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 08:48:19,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:48:19,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 08:48:19,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:48:19,520 INFO L87 Difference]: Start difference. First operand 2808 states and 4279 transitions. Second operand 8 states. [2020-10-14 08:48:19,721 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-14 08:48:21,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:48:21,734 INFO L93 Difference]: Finished difference Result 30508 states and 46689 transitions. [2020-10-14 08:48:21,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 08:48:21,735 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-14 08:48:21,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:48:21,872 INFO L225 Difference]: With dead ends: 30508 [2020-10-14 08:48:21,873 INFO L226 Difference]: Without dead ends: 27738 [2020-10-14 08:48:21,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-14 08:48:21,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27738 states. [2020-10-14 08:48:22,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27738 to 5576. [2020-10-14 08:48:22,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5576 states. [2020-10-14 08:48:22,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5576 states to 5576 states and 8391 transitions. [2020-10-14 08:48:22,694 INFO L78 Accepts]: Start accepts. Automaton has 5576 states and 8391 transitions. Word has length 68 [2020-10-14 08:48:22,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:48:22,694 INFO L479 AbstractCegarLoop]: Abstraction has 5576 states and 8391 transitions. [2020-10-14 08:48:22,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 08:48:22,695 INFO L276 IsEmpty]: Start isEmpty. Operand 5576 states and 8391 transitions. [2020-10-14 08:48:22,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:48:22,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:48:22,697 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] [2020-10-14 08:48:22,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:48:22,698 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:48:22,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:48:22,699 INFO L82 PathProgramCache]: Analyzing trace with hash -247795733, now seen corresponding path program 1 times [2020-10-14 08:48:22,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:48:22,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764203032] [2020-10-14 08:48:22,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:48:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:22,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:22,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:22,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:22,906 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:22,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:48:22,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 08:48:22,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 186 [2020-10-14 08:48:22,907 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:22,907 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:22,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:48:22,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:48:22,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 08:48:22,908 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:48:23,062 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:48:23,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:48:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:23,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:23,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:23,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:48:23,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:23,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:48:23,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:23,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:23,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:48:23,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:48:23,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:48:23,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:48:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:48:23,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764203032] [2020-10-14 08:48:23,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:48:23,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:48:23,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110423822] [2020-10-14 08:48:23,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:48:23,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:48:23,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:48:23,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:48:23,097 INFO L87 Difference]: Start difference. First operand 5576 states and 8391 transitions. Second operand 4 states. [2020-10-14 08:48:23,250 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-14 08:48:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:48:24,015 INFO L93 Difference]: Finished difference Result 13564 states and 20345 transitions. [2020-10-14 08:48:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:48:24,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 08:48:24,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:48:24,038 INFO L225 Difference]: With dead ends: 13564 [2020-10-14 08:48:24,038 INFO L226 Difference]: Without dead ends: 8026 [2020-10-14 08:48:24,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:48:24,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8026 states. [2020-10-14 08:48:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8026 to 7960. [2020-10-14 08:48:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7960 states. [2020-10-14 08:48:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7960 states to 7960 states and 11767 transitions. [2020-10-14 08:48:24,866 INFO L78 Accepts]: Start accepts. Automaton has 7960 states and 11767 transitions. Word has length 70 [2020-10-14 08:48:24,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:48:24,866 INFO L479 AbstractCegarLoop]: Abstraction has 7960 states and 11767 transitions. [2020-10-14 08:48:24,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:48:24,866 INFO L276 IsEmpty]: Start isEmpty. Operand 7960 states and 11767 transitions. [2020-10-14 08:48:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:48:24,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:48:24,868 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] [2020-10-14 08:48:24,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:48:24,868 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:48:24,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:48:24,868 INFO L82 PathProgramCache]: Analyzing trace with hash -227746390, now seen corresponding path program 1 times [2020-10-14 08:48:24,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:48:24,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633686217] [2020-10-14 08:48:24,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:48:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:24,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:25,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:25,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:48:25,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:25,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 185 [2020-10-14 08:48:25,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:25,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:25,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 08:48:25,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:48:25,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 08:48:25,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:48:25,314 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:48:25,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:48:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:25,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:25,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:25,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:48:25,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:25,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:48:25,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:25,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:25,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:48:25,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:48:25,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:48:25,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:48:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:48:25,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633686217] [2020-10-14 08:48:25,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:48:25,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-14 08:48:25,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438285740] [2020-10-14 08:48:25,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 08:48:25,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:48:25,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 08:48:25,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-14 08:48:25,357 INFO L87 Difference]: Start difference. First operand 7960 states and 11767 transitions. Second operand 8 states. [2020-10-14 08:48:25,594 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-14 08:48:28,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:48:28,307 INFO L93 Difference]: Finished difference Result 45196 states and 67041 transitions. [2020-10-14 08:48:28,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 08:48:28,308 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 70 [2020-10-14 08:48:28,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:48:28,506 INFO L225 Difference]: With dead ends: 45196 [2020-10-14 08:48:28,506 INFO L226 Difference]: Without dead ends: 37274 [2020-10-14 08:48:28,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-14 08:48:28,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37274 states. [2020-10-14 08:48:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37274 to 7960. [2020-10-14 08:48:29,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7960 states. [2020-10-14 08:48:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7960 states to 7960 states and 11671 transitions. [2020-10-14 08:48:29,556 INFO L78 Accepts]: Start accepts. Automaton has 7960 states and 11671 transitions. Word has length 70 [2020-10-14 08:48:29,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:48:29,556 INFO L479 AbstractCegarLoop]: Abstraction has 7960 states and 11671 transitions. [2020-10-14 08:48:29,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 08:48:29,557 INFO L276 IsEmpty]: Start isEmpty. Operand 7960 states and 11671 transitions. [2020-10-14 08:48:29,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 08:48:29,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:48:29,558 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] [2020-10-14 08:48:29,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:48:29,558 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:48:29,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:48:29,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1527887156, now seen corresponding path program 1 times [2020-10-14 08:48:29,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:48:29,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825530072] [2020-10-14 08:48:29,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:48:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:29,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:29,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:29,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 08:48:29,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:29,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-14 08:48:29,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:29,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:29,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:48:29,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-14 08:48:29,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 08:48:29,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:48:29,861 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:48:29,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:48:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:29,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:29,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:29,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:48:29,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:29,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:48:29,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:29,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:29,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:48:29,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:48:29,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:48:29,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:48:29,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:48:29,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825530072] [2020-10-14 08:48:29,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:48:29,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:48:29,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951004907] [2020-10-14 08:48:29,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:48:29,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:48:29,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:48:29,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:48:29,898 INFO L87 Difference]: Start difference. First operand 7960 states and 11671 transitions. Second operand 5 states. [2020-10-14 08:48:31,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:48:31,707 INFO L93 Difference]: Finished difference Result 14441 states and 21163 transitions. [2020-10-14 08:48:31,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:48:31,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2020-10-14 08:48:31,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:48:31,743 INFO L225 Difference]: With dead ends: 14441 [2020-10-14 08:48:31,744 INFO L226 Difference]: Without dead ends: 14439 [2020-10-14 08:48:31,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:48:31,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14439 states. [2020-10-14 08:48:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14439 to 8216. [2020-10-14 08:48:32,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8216 states. [2020-10-14 08:48:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8216 states to 8216 states and 11895 transitions. [2020-10-14 08:48:32,897 INFO L78 Accepts]: Start accepts. Automaton has 8216 states and 11895 transitions. Word has length 71 [2020-10-14 08:48:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:48:32,897 INFO L479 AbstractCegarLoop]: Abstraction has 8216 states and 11895 transitions. [2020-10-14 08:48:32,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:48:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 8216 states and 11895 transitions. [2020-10-14 08:48:32,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 08:48:32,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:48:32,899 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] [2020-10-14 08:48:32,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:48:32,899 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:48:32,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:48:32,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1834722387, now seen corresponding path program 1 times [2020-10-14 08:48:32,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:48:32,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152143120] [2020-10-14 08:48:32,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:48:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:32,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:32,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:32,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:33,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:34,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:34,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 08:48:34,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:48:34,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1147 [2020-10-14 08:48:34,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:34,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:34,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:48:34,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:48:34,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 08:48:34,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:48:34,200 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:48:34,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:48:34,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:34,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:34,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:34,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:48:34,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:34,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:48:34,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:34,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:34,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:48:34,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:48:34,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:48:34,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:48:34,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:48:34,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152143120] [2020-10-14 08:48:34,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:48:34,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:48:34,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833260381] [2020-10-14 08:48:34,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:48:34,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:48:34,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:48:34,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:48:34,227 INFO L87 Difference]: Start difference. First operand 8216 states and 11895 transitions. Second operand 4 states. [2020-10-14 08:48:34,381 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-14 08:48:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:48:35,767 INFO L93 Difference]: Finished difference Result 18591 states and 27133 transitions. [2020-10-14 08:48:35,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:48:35,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 08:48:35,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:48:35,789 INFO L225 Difference]: With dead ends: 18591 [2020-10-14 08:48:35,789 INFO L226 Difference]: Without dead ends: 12796 [2020-10-14 08:48:35,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:48:35,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12796 states. [2020-10-14 08:48:36,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12796 to 12794. [2020-10-14 08:48:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12794 states. [2020-10-14 08:48:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12794 states to 12794 states and 18457 transitions. [2020-10-14 08:48:37,018 INFO L78 Accepts]: Start accepts. Automaton has 12794 states and 18457 transitions. Word has length 71 [2020-10-14 08:48:37,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:48:37,018 INFO L479 AbstractCegarLoop]: Abstraction has 12794 states and 18457 transitions. [2020-10-14 08:48:37,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:48:37,018 INFO L276 IsEmpty]: Start isEmpty. Operand 12794 states and 18457 transitions. [2020-10-14 08:48:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 08:48:37,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:48:37,024 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:48:37,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:48:37,025 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:48:37,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:48:37,025 INFO L82 PathProgramCache]: Analyzing trace with hash -111933818, now seen corresponding path program 1 times [2020-10-14 08:48:37,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:48:37,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693856643] [2020-10-14 08:48:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:48:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:37,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:37,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:37,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:37,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:37,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:37,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:37,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:38,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:38,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:38,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:39,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:39,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:39,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:42,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:42,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 08:48:42,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 08:48:42,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:48:42,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:42,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:42,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:48:42,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:48:42,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 08:48:42,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:48:42,211 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:48:42,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:48:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:42,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:42,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:42,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:48:42,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:42,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:48:42,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:42,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:42,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:48:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:48:42,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:48:42,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:48:42,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:48:42,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693856643] [2020-10-14 08:48:42,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:48:42,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:48:42,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683376821] [2020-10-14 08:48:42,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:48:42,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:48:42,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:48:42,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:48:42,246 INFO L87 Difference]: Start difference. First operand 12794 states and 18457 transitions. Second operand 4 states. [2020-10-14 08:48:43,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:48:43,598 INFO L93 Difference]: Finished difference Result 23204 states and 33609 transitions. [2020-10-14 08:48:43,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:48:43,600 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-14 08:48:43,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:48:43,618 INFO L225 Difference]: With dead ends: 23204 [2020-10-14 08:48:43,618 INFO L226 Difference]: Without dead ends: 10450 [2020-10-14 08:48:43,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:48:43,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10450 states. [2020-10-14 08:48:44,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10450 to 10448. [2020-10-14 08:48:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10448 states. [2020-10-14 08:48:44,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10448 states to 10448 states and 15062 transitions. [2020-10-14 08:48:44,601 INFO L78 Accepts]: Start accepts. Automaton has 10448 states and 15062 transitions. Word has length 98 [2020-10-14 08:48:44,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:48:44,601 INFO L479 AbstractCegarLoop]: Abstraction has 10448 states and 15062 transitions. [2020-10-14 08:48:44,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:48:44,602 INFO L276 IsEmpty]: Start isEmpty. Operand 10448 states and 15062 transitions. [2020-10-14 08:48:44,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 08:48:44,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:48:44,606 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:48:44,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:48:44,607 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:48:44,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:48:44,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1194962622, now seen corresponding path program 1 times [2020-10-14 08:48:44,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:48:44,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952326975] [2020-10-14 08:48:44,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:48:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:44,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:44,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:44,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:45,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:45,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:45,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:45,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:45,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:46,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:46,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:46,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:47,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:47,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:47,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:48,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:49,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:49,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 08:48:49,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 08:48:49,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:48:49,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:49,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:49,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:48:49,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:48:49,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 08:48:49,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:48:49,784 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:48:49,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:48:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:49,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:49,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:49,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:48:49,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:49,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:48:49,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:49,794 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:49,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:48:49,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:48:49,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:48:49,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:48:49,808 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:48:49,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952326975] [2020-10-14 08:48:49,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:48:49,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:48:49,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293733254] [2020-10-14 08:48:49,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:48:49,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:48:49,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:48:49,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:48:49,811 INFO L87 Difference]: Start difference. First operand 10448 states and 15062 transitions. Second operand 6 states. [2020-10-14 08:48:49,986 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-14 08:48:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:48:51,918 INFO L93 Difference]: Finished difference Result 30422 states and 44121 transitions. [2020-10-14 08:48:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:48:51,919 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-14 08:48:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:48:51,955 INFO L225 Difference]: With dead ends: 30422 [2020-10-14 08:48:51,955 INFO L226 Difference]: Without dead ends: 20052 [2020-10-14 08:48:51,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:48:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20052 states. [2020-10-14 08:48:53,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20052 to 20048. [2020-10-14 08:48:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20048 states. [2020-10-14 08:48:53,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20048 states to 20048 states and 28886 transitions. [2020-10-14 08:48:53,743 INFO L78 Accepts]: Start accepts. Automaton has 20048 states and 28886 transitions. Word has length 99 [2020-10-14 08:48:53,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:48:53,743 INFO L479 AbstractCegarLoop]: Abstraction has 20048 states and 28886 transitions. [2020-10-14 08:48:53,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:48:53,743 INFO L276 IsEmpty]: Start isEmpty. Operand 20048 states and 28886 transitions. [2020-10-14 08:48:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 08:48:53,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:48:53,749 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:48:53,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 08:48:53,749 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:48:53,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:48:53,750 INFO L82 PathProgramCache]: Analyzing trace with hash 493391240, now seen corresponding path program 1 times [2020-10-14 08:48:53,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:48:53,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178003949] [2020-10-14 08:48:53,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:48:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:53,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:53,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:53,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:53,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:54,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:56,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:56,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:57,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:58,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:58,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:58,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:58,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 08:48:58,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 08:48:58,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 08:48:58,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:58,780 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:58,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:48:58,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 08:48:58,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-14 08:48:58,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:48:58,928 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:48:58,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:48:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:48:58,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:48:58,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:48:58,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:48:58,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:48:58,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:48:58,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:48:58,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:48:58,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:48:58,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:48:58,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:48:58,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:48:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:48:58,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178003949] [2020-10-14 08:48:58,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:48:58,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:48:58,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901964491] [2020-10-14 08:48:58,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:48:58,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:48:58,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:48:58,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:48:58,962 INFO L87 Difference]: Start difference. First operand 20048 states and 28886 transitions. Second operand 6 states. [2020-10-14 08:48:59,128 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-14 08:49:02,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:49:02,144 INFO L93 Difference]: Finished difference Result 53446 states and 77161 transitions. [2020-10-14 08:49:02,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:49:02,144 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-14 08:49:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:49:02,192 INFO L225 Difference]: With dead ends: 53446 [2020-10-14 08:49:02,192 INFO L226 Difference]: Without dead ends: 33476 [2020-10-14 08:49:02,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:49:02,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33476 states. [2020-10-14 08:49:04,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33476 to 30416. [2020-10-14 08:49:04,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30416 states. [2020-10-14 08:49:04,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30416 states to 30416 states and 43990 transitions. [2020-10-14 08:49:04,898 INFO L78 Accepts]: Start accepts. Automaton has 30416 states and 43990 transitions. Word has length 99 [2020-10-14 08:49:04,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:49:04,898 INFO L479 AbstractCegarLoop]: Abstraction has 30416 states and 43990 transitions. [2020-10-14 08:49:04,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:49:04,898 INFO L276 IsEmpty]: Start isEmpty. Operand 30416 states and 43990 transitions. [2020-10-14 08:49:04,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 08:49:04,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:49:04,905 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:49:04,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 08:49:04,905 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:49:04,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:49:04,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1492947110, now seen corresponding path program 1 times [2020-10-14 08:49:04,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:49:04,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554077063] [2020-10-14 08:49:04,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:49:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:49:04,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:04,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:05,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:05,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:05,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:06,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:06,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:07,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:07,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:07,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:07,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:09,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:49:09,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 08:49:09,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-14 08:49:09,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:49:09,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:49:09,931 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:49:09,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:49:09,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 08:49:09,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-14 08:49:09,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:49:10,099 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:49:10,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:49:10,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:49:10,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:10,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:49:10,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:49:10,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:49:10,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:49:10,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:49:10,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:49:10,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:49:10,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:49:10,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:49:10,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:49:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:49:10,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554077063] [2020-10-14 08:49:10,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:49:10,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:49:10,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009987039] [2020-10-14 08:49:10,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:49:10,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:49:10,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:49:10,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:49:10,125 INFO L87 Difference]: Start difference. First operand 30416 states and 43990 transitions. Second operand 6 states. [2020-10-14 08:49:10,294 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-14 08:49:13,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:49:13,886 INFO L93 Difference]: Finished difference Result 69190 states and 100009 transitions. [2020-10-14 08:49:13,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:49:13,887 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-14 08:49:13,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:49:13,927 INFO L225 Difference]: With dead ends: 69190 [2020-10-14 08:49:13,927 INFO L226 Difference]: Without dead ends: 38852 [2020-10-14 08:49:13,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:49:13,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38852 states. [2020-10-14 08:49:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38852 to 35600. [2020-10-14 08:49:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35600 states. [2020-10-14 08:49:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35600 states to 35600 states and 51542 transitions. [2020-10-14 08:49:17,030 INFO L78 Accepts]: Start accepts. Automaton has 35600 states and 51542 transitions. Word has length 99 [2020-10-14 08:49:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:49:17,030 INFO L479 AbstractCegarLoop]: Abstraction has 35600 states and 51542 transitions. [2020-10-14 08:49:17,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:49:17,031 INFO L276 IsEmpty]: Start isEmpty. Operand 35600 states and 51542 transitions. [2020-10-14 08:49:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 08:49:17,035 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:49:17,036 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:49:17,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 08:49:17,036 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:49:17,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:49:17,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1516692332, now seen corresponding path program 1 times [2020-10-14 08:49:17,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:49:17,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368441104] [2020-10-14 08:49:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:49:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:49:17,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:17,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:17,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:17,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:17,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:18,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:18,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:18,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:18,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:22,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:49:22,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 08:49:22,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:49:22,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:49:22,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:49:22,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:49:22,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:49:22,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 08:49:22,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-14 08:49:22,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:49:22,214 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:49:22,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:49:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:49:22,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:22,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:49:22,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:49:22,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:49:22,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:49:22,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:49:22,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:49:22,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:49:22,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:49:22,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:49:22,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:49:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:49:22,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368441104] [2020-10-14 08:49:22,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:49:22,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:49:22,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699031308] [2020-10-14 08:49:22,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:49:22,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:49:22,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:49:22,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:49:22,249 INFO L87 Difference]: Start difference. First operand 35600 states and 51542 transitions. Second operand 6 states. [2020-10-14 08:49:22,418 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-14 08:49:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:49:26,993 INFO L93 Difference]: Finished difference Result 80134 states and 115881 transitions. [2020-10-14 08:49:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:49:26,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-14 08:49:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:49:27,044 INFO L225 Difference]: With dead ends: 80134 [2020-10-14 08:49:27,045 INFO L226 Difference]: Without dead ends: 44612 [2020-10-14 08:49:27,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:49:27,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44612 states. [2020-10-14 08:49:30,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44612 to 40784. [2020-10-14 08:49:30,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40784 states. [2020-10-14 08:49:30,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40784 states to 40784 states and 59094 transitions. [2020-10-14 08:49:30,505 INFO L78 Accepts]: Start accepts. Automaton has 40784 states and 59094 transitions. Word has length 99 [2020-10-14 08:49:30,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:49:30,505 INFO L479 AbstractCegarLoop]: Abstraction has 40784 states and 59094 transitions. [2020-10-14 08:49:30,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:49:30,505 INFO L276 IsEmpty]: Start isEmpty. Operand 40784 states and 59094 transitions. [2020-10-14 08:49:30,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-14 08:49:30,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:49:30,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:49:30,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 08:49:30,510 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:49:30,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:49:30,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1889218226, now seen corresponding path program 1 times [2020-10-14 08:49:30,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:49:30,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803748662] [2020-10-14 08:49:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:49:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:49:30,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:30,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:30,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:30,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:31,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:31,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:31,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:33,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:35,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:49:35,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-14 08:49:35,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:49:35,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:49:35,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:49:35,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:49:35,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:49:35,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 08:49:35,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-14 08:49:35,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:49:35,684 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:49:35,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:49:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:49:35,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:35,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:49:35,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:49:35,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:49:35,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:49:35,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:49:35,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:49:35,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:49:35,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:49:35,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:49:35,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:49:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:49:35,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803748662] [2020-10-14 08:49:35,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:49:35,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:49:35,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830240600] [2020-10-14 08:49:35,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:49:35,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:49:35,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:49:35,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:49:35,806 INFO L87 Difference]: Start difference. First operand 40784 states and 59094 transitions. Second operand 6 states. [2020-10-14 08:49:35,975 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-14 08:49:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:49:40,470 INFO L93 Difference]: Finished difference Result 91462 states and 132297 transitions. [2020-10-14 08:49:40,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:49:40,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 99 [2020-10-14 08:49:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:49:40,524 INFO L225 Difference]: With dead ends: 91462 [2020-10-14 08:49:40,524 INFO L226 Difference]: Without dead ends: 50756 [2020-10-14 08:49:40,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:49:40,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50756 states. [2020-10-14 08:49:45,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50756 to 45968. [2020-10-14 08:49:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45968 states. [2020-10-14 08:49:45,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45968 states to 45968 states and 66646 transitions. [2020-10-14 08:49:45,596 INFO L78 Accepts]: Start accepts. Automaton has 45968 states and 66646 transitions. Word has length 99 [2020-10-14 08:49:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:49:45,596 INFO L479 AbstractCegarLoop]: Abstraction has 45968 states and 66646 transitions. [2020-10-14 08:49:45,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:49:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 45968 states and 66646 transitions. [2020-10-14 08:49:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 08:49:45,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:49:45,601 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:49:45,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 08:49:45,601 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:49:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:49:45,602 INFO L82 PathProgramCache]: Analyzing trace with hash 742986999, now seen corresponding path program 1 times [2020-10-14 08:49:45,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:49:45,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51274878] [2020-10-14 08:49:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:49:45,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:49:45,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:45,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:45,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:45,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:46,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:46,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:46,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:47,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:47,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:47,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:48,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:49,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:49,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:50,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:49:50,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 08:49:50,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 08:49:50,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:49:50,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:49:50,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:49:50,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 08:49:50,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:49:50,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-14 08:49:50,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:49:50,898 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:49:50,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:49:50,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:49:50,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:49:50,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:49:50,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:49:50,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:49:50,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:49:50,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:49:50,915 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:49:50,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:49:50,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:49:50,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:49:50,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:49:50,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:49:50,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51274878] [2020-10-14 08:49:50,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:49:50,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 08:49:50,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566752267] [2020-10-14 08:49:50,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 08:49:50,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:49:50,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 08:49:50,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-14 08:49:50,938 INFO L87 Difference]: Start difference. First operand 45968 states and 66646 transitions. Second operand 11 states. [2020-10-14 08:49:51,133 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-14 08:50:16,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:50:16,281 INFO L93 Difference]: Finished difference Result 271779 states and 389637 transitions. [2020-10-14 08:50:16,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 08:50:16,281 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 100 [2020-10-14 08:50:16,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:50:16,602 INFO L225 Difference]: With dead ends: 271779 [2020-10-14 08:50:16,602 INFO L226 Difference]: Without dead ends: 225865 [2020-10-14 08:50:16,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 08:50:16,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225865 states. [2020-10-14 08:50:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225865 to 109399. [2020-10-14 08:50:30,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109399 states. [2020-10-14 08:50:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109399 states to 109399 states and 156927 transitions. [2020-10-14 08:50:30,901 INFO L78 Accepts]: Start accepts. Automaton has 109399 states and 156927 transitions. Word has length 100 [2020-10-14 08:50:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:50:30,901 INFO L479 AbstractCegarLoop]: Abstraction has 109399 states and 156927 transitions. [2020-10-14 08:50:30,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 08:50:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 109399 states and 156927 transitions. [2020-10-14 08:50:30,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-14 08:50:30,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:50:30,910 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:50:30,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 08:50:30,911 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:50:30,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:50:30,911 INFO L82 PathProgramCache]: Analyzing trace with hash -434121907, now seen corresponding path program 1 times [2020-10-14 08:50:30,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:50:30,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059670720] [2020-10-14 08:50:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:50:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:50:30,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:50:30,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:50:31,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:50:31,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:50:32,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:50:32,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:50:32,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:50:32,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:50:32,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:50:33,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:50:33,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:50:33,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:50:35,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:50:35,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-14 08:50:35,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 08:50:35,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:50:35,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:50:35,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:50:35,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 08:50:35,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:50:35,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 08:50:35,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:50:36,213 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-14 08:50:36,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:50:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:50:36,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:50:36,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:50:36,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:50:36,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:50:36,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:50:36,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:50:36,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:50:36,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:50:36,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:50:36,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:50:36,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:50:36,256 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:50:36,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059670720] [2020-10-14 08:50:36,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:50:36,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 08:50:36,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943293360] [2020-10-14 08:50:36,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 08:50:36,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:50:36,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 08:50:36,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-14 08:50:36,258 INFO L87 Difference]: Start difference. First operand 109399 states and 156927 transitions. Second operand 11 states. [2020-10-14 08:50:36,455 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-14 08:51:20,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:51:20,420 INFO L93 Difference]: Finished difference Result 451117 states and 641918 transitions. [2020-10-14 08:51:20,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 08:51:20,421 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 101 [2020-10-14 08:51:20,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:51:20,868 INFO L225 Difference]: With dead ends: 451117 [2020-10-14 08:51:20,869 INFO L226 Difference]: Without dead ends: 341819 [2020-10-14 08:51:20,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 08:51:21,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341819 states.