/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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:51:51,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:51:51,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:51:51,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:51:51,275 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:51:51,276 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:51:51,277 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:51:51,279 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:51:51,281 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:51:51,282 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:51:51,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:51:51,284 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:51:51,284 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:51:51,285 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:51:51,286 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:51:51,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:51:51,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:51:51,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:51:51,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:51:51,293 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:51:51,294 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:51:51,295 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:51:51,296 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:51:51,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:51:51,300 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:51:51,300 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:51:51,300 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:51:51,301 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:51:51,302 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:51:51,303 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:51:51,303 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:51:51,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:51:51,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:51:51,305 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:51:51,307 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:51:51,307 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:51:51,307 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:51:51,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:51:51,308 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:51:51,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:51:51,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:51:51,313 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 [2020-10-13 14:51:51,359 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:51:51,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:51:51,363 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:51:51,363 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:51:51,363 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:51:51,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:51:51,363 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:51:51,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:51:51,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:51:51,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:51:51,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:51:51,364 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:51:51,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:51:51,365 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:51:51,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:51:51,369 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:51:51,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:51:51,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:51:51,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:51:51,370 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:51:51,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:51:51,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:51:51,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:51:51,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:51:51,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:51:51,372 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:51:51,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:51:51,373 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:51:51,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:51:51,373 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:51:51,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:51:51,713 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:51:51,720 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:51:51,722 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:51:51,724 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:51:51,725 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:51:51,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f648ca2e/f6f1e64facaa4d98879c305864627db1/FLAG7602156a6 [2020-10-13 14:51:52,316 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:51:52,317 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:51:52,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f648ca2e/f6f1e64facaa4d98879c305864627db1/FLAG7602156a6 [2020-10-13 14:51:52,619 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9f648ca2e/f6f1e64facaa4d98879c305864627db1 [2020-10-13 14:51:52,628 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:51:52,630 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:51:52,631 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:51:52,631 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:51:52,634 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:51:52,635 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:51:52" (1/1) ... [2020-10-13 14:51:52,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3afd2ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:51:52, skipping insertion in model container [2020-10-13 14:51:52,639 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:51:52" (1/1) ... [2020-10-13 14:51:52,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:51:52,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:51:53,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:51:53,184 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:51:53,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:51:53,326 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:51:53,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:51:53 WrapperNode [2020-10-13 14:51:53,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:51:53,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:51:53,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:51:53,328 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:51:53,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:51:53" (1/1) ... [2020-10-13 14:51:53,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:51:53" (1/1) ... [2020-10-13 14:51:53,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:51:53" (1/1) ... [2020-10-13 14:51:53,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:51:53" (1/1) ... [2020-10-13 14:51:53,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:51:53" (1/1) ... [2020-10-13 14:51:53,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:51:53" (1/1) ... [2020-10-13 14:51:53,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:51:53" (1/1) ... [2020-10-13 14:51:53,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:51:53,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:51:53,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:51:53,449 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:51:53,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:51:53" (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 [2020-10-13 14:51:53,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:51:53,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:51:53,540 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:51:53,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:51:53,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:51:53,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:51:53,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:51:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:51:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:51:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:51:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:51:53,543 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:51:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:51:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:51:53,544 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:51:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:51:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:51:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:51:53,545 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-13 14:51:53,546 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:51:53,546 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:51:53,546 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:51:53,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:51:53,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:51:54,697 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:51:54,698 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:51:54,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:51:54 BoogieIcfgContainer [2020-10-13 14:51:54,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:51:54,716 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:51:54,716 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:51:54,719 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:51:54,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:51:52" (1/3) ... [2020-10-13 14:51:54,721 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b69b228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:51:54, skipping insertion in model container [2020-10-13 14:51:54,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:51:53" (2/3) ... [2020-10-13 14:51:54,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b69b228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:51:54, skipping insertion in model container [2020-10-13 14:51:54,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:51:54" (3/3) ... [2020-10-13 14:51:54,724 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:51:54,735 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:51:54,755 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:51:54,769 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:51:54,802 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:51:54,802 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:51:54,802 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:51:54,802 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:51:54,803 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:51:54,803 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:51:54,803 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:51:54,803 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:51:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states. [2020-10-13 14:51:54,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 14:51:54,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:51:54,864 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:51:54,865 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:51:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:51:54,872 INFO L82 PathProgramCache]: Analyzing trace with hash 575977303, now seen corresponding path program 1 times [2020-10-13 14:51:54,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:51:54,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239380571] [2020-10-13 14:51:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:51:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:51:55,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:55,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:51:56,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:00,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:00,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-13 14:52:00,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:52:00,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 14:52:00,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:00,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:52:00,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-13 14:52:00,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:52:00,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 14:52:00,711 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:52:00,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:00,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:00,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:00,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:00,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:00,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:00,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 14:52:00,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:00,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:52:00,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:00,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:52:00,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:52:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:52:00,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239380571] [2020-10-13 14:52:00,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:00,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:52:00,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974589769] [2020-10-13 14:52:00,818 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:52:00,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:00,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:52:00,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:52:00,841 INFO L87 Difference]: Start difference. First operand 263 states. Second operand 4 states. [2020-10-13 14:52:01,160 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-13 14:52:02,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:52:02,386 INFO L93 Difference]: Finished difference Result 528 states and 869 transitions. [2020-10-13 14:52:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:52:02,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2020-10-13 14:52:02,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:52:02,404 INFO L225 Difference]: With dead ends: 528 [2020-10-13 14:52:02,405 INFO L226 Difference]: Without dead ends: 399 [2020-10-13 14:52:02,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:52:02,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2020-10-13 14:52:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 397. [2020-10-13 14:52:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-13 14:52:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 595 transitions. [2020-10-13 14:52:02,483 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 595 transitions. Word has length 100 [2020-10-13 14:52:02,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:52:02,484 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 595 transitions. [2020-10-13 14:52:02,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:52:02,484 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 595 transitions. [2020-10-13 14:52:02,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 14:52:02,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:02,489 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:52:02,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:52:02,489 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:02,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:02,490 INFO L82 PathProgramCache]: Analyzing trace with hash 332738772, now seen corresponding path program 1 times [2020-10-13 14:52:02,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:02,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398322693] [2020-10-13 14:52:02,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:02,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:02,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:03,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:03,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 14:52:03,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:52:03,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1233 [2020-10-13 14:52:03,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:52:03,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-13 14:52:03,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:52:03,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:04,058 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:52:04,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:04,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:04,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:04,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:04,079 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:04,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:52:04,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:52:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:04,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:52:04,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:52:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:52:04,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398322693] [2020-10-13 14:52:04,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:04,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:52:04,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034570001] [2020-10-13 14:52:04,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:52:04,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:04,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:52:04,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:52:04,107 INFO L87 Difference]: Start difference. First operand 397 states and 595 transitions. Second operand 5 states. [2020-10-13 14:52:05,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:52:05,380 INFO L93 Difference]: Finished difference Result 610 states and 933 transitions. [2020-10-13 14:52:05,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:52:05,381 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 101 [2020-10-13 14:52:05,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:52:05,389 INFO L225 Difference]: With dead ends: 610 [2020-10-13 14:52:05,392 INFO L226 Difference]: Without dead ends: 608 [2020-10-13 14:52:05,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:52:05,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2020-10-13 14:52:05,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 399. [2020-10-13 14:52:05,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 399 states. [2020-10-13 14:52:05,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 597 transitions. [2020-10-13 14:52:05,440 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 597 transitions. Word has length 101 [2020-10-13 14:52:05,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:52:05,441 INFO L479 AbstractCegarLoop]: Abstraction has 399 states and 597 transitions. [2020-10-13 14:52:05,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:52:05,441 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 597 transitions. [2020-10-13 14:52:05,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 14:52:05,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:05,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:52:05,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:52:05,444 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:05,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:05,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2069199781, now seen corresponding path program 1 times [2020-10-13 14:52:05,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:05,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730796526] [2020-10-13 14:52:05,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:05,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:05,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:07,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:07,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 14:52:07,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:52:07,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1854 [2020-10-13 14:52:07,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:07,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:52:07,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:52:07,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 14:52:07,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:52:07,769 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:52:07,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:07,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:07,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:07,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:07,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:07,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:52:07,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:07,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:52:07,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:07,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:52:07,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:52:07,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730796526] [2020-10-13 14:52:07,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:07,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:52:07,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586013961] [2020-10-13 14:52:07,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:52:07,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:07,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:52:07,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:52:07,919 INFO L87 Difference]: Start difference. First operand 399 states and 597 transitions. Second operand 9 states. [2020-10-13 14:52:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:52:11,738 INFO L93 Difference]: Finished difference Result 1976 states and 3067 transitions. [2020-10-13 14:52:11,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:52:11,741 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 102 [2020-10-13 14:52:11,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:52:11,751 INFO L225 Difference]: With dead ends: 1976 [2020-10-13 14:52:11,752 INFO L226 Difference]: Without dead ends: 1680 [2020-10-13 14:52:11,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:52:11,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2020-10-13 14:52:11,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1670. [2020-10-13 14:52:11,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1670 states. [2020-10-13 14:52:11,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2585 transitions. [2020-10-13 14:52:11,860 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2585 transitions. Word has length 102 [2020-10-13 14:52:11,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:52:11,861 INFO L479 AbstractCegarLoop]: Abstraction has 1670 states and 2585 transitions. [2020-10-13 14:52:11,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:52:11,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2585 transitions. [2020-10-13 14:52:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 14:52:11,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:11,868 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:52:11,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:52:11,868 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:11,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1752939130, now seen corresponding path program 1 times [2020-10-13 14:52:11,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:11,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743960816] [2020-10-13 14:52:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:11,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:12,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:12,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:12,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 14:52:12,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:52:12,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 741 [2020-10-13 14:52:12,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:12,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:52:12,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:52:12,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 14:52:12,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:12,916 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:52:12,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:12,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:12,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:12,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:12,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:12,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-13 14:52:12,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:12,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:52:12,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:12,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:52:12,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:52:12,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743960816] [2020-10-13 14:52:12,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:12,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:52:12,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386540810] [2020-10-13 14:52:12,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:52:12,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:12,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:52:12,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:52:12,984 INFO L87 Difference]: Start difference. First operand 1670 states and 2585 transitions. Second operand 6 states. [2020-10-13 14:52:13,223 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-13 14:52:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:52:14,784 INFO L93 Difference]: Finished difference Result 4498 states and 7030 transitions. [2020-10-13 14:52:14,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:52:14,785 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2020-10-13 14:52:14,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:52:14,837 INFO L225 Difference]: With dead ends: 4498 [2020-10-13 14:52:14,838 INFO L226 Difference]: Without dead ends: 2922 [2020-10-13 14:52:14,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:52:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2922 states. [2020-10-13 14:52:15,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2922 to 2920. [2020-10-13 14:52:15,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2920 states. [2020-10-13 14:52:15,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2920 states to 2920 states and 4537 transitions. [2020-10-13 14:52:15,100 INFO L78 Accepts]: Start accepts. Automaton has 2920 states and 4537 transitions. Word has length 103 [2020-10-13 14:52:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:52:15,101 INFO L479 AbstractCegarLoop]: Abstraction has 2920 states and 4537 transitions. [2020-10-13 14:52:15,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:52:15,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2920 states and 4537 transitions. [2020-10-13 14:52:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 14:52:15,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:15,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:52:15,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:52:15,110 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:15,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:15,111 INFO L82 PathProgramCache]: Analyzing trace with hash 824333515, now seen corresponding path program 1 times [2020-10-13 14:52:15,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:15,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142740074] [2020-10-13 14:52:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:15,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:15,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:15,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:15,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 14:52:15,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:52:15,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 752 [2020-10-13 14:52:15,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:15,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:52:15,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:52:15,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 14:52:15,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:52:16,197 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:52:16,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:16,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:16,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:16,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:16,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:16,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 14:52:16,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:52:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:52:16,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:52:16,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142740074] [2020-10-13 14:52:16,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:16,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:52:16,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655084953] [2020-10-13 14:52:16,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:52:16,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:16,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:52:16,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:52:16,262 INFO L87 Difference]: Start difference. First operand 2920 states and 4537 transitions. Second operand 6 states. [2020-10-13 14:52:16,572 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-13 14:52:18,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:52:18,175 INFO L93 Difference]: Finished difference Result 8084 states and 12631 transitions. [2020-10-13 14:52:18,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:52:18,176 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2020-10-13 14:52:18,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:52:18,206 INFO L225 Difference]: With dead ends: 8084 [2020-10-13 14:52:18,206 INFO L226 Difference]: Without dead ends: 5288 [2020-10-13 14:52:18,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:52:18,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2020-10-13 14:52:18,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 5286. [2020-10-13 14:52:18,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5286 states. [2020-10-13 14:52:18,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5286 states to 5286 states and 8210 transitions. [2020-10-13 14:52:18,583 INFO L78 Accepts]: Start accepts. Automaton has 5286 states and 8210 transitions. Word has length 103 [2020-10-13 14:52:18,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:52:18,584 INFO L479 AbstractCegarLoop]: Abstraction has 5286 states and 8210 transitions. [2020-10-13 14:52:18,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:52:18,584 INFO L276 IsEmpty]: Start isEmpty. Operand 5286 states and 8210 transitions. [2020-10-13 14:52:18,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 14:52:18,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:18,591 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:52:18,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:52:18,591 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:18,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:18,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2048312548, now seen corresponding path program 1 times [2020-10-13 14:52:18,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:18,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940461917] [2020-10-13 14:52:18,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:18,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:18,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:19,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:19,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 14:52:19,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:52:19,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-13 14:52:19,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:19,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:52:19,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:52:19,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 14:52:19,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 14:52:19,636 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:52:19,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:19,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:19,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:19,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:19,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:19,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 14:52:19,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:19,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:52:19,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:19,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:52:19,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:52:19,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940461917] [2020-10-13 14:52:19,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:19,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:52:19,699 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224920103] [2020-10-13 14:52:19,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:52:19,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:19,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:52:19,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:52:19,700 INFO L87 Difference]: Start difference. First operand 5286 states and 8210 transitions. Second operand 6 states. [2020-10-13 14:52:19,990 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-13 14:52:21,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:52:21,695 INFO L93 Difference]: Finished difference Result 14897 states and 23207 transitions. [2020-10-13 14:52:21,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:52:21,696 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2020-10-13 14:52:21,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:52:21,744 INFO L225 Difference]: With dead ends: 14897 [2020-10-13 14:52:21,744 INFO L226 Difference]: Without dead ends: 9772 [2020-10-13 14:52:21,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:52:21,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9772 states. [2020-10-13 14:52:22,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9772 to 9770. [2020-10-13 14:52:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9770 states. [2020-10-13 14:52:22,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9770 states to 9770 states and 15136 transitions. [2020-10-13 14:52:22,359 INFO L78 Accepts]: Start accepts. Automaton has 9770 states and 15136 transitions. Word has length 103 [2020-10-13 14:52:22,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:52:22,360 INFO L479 AbstractCegarLoop]: Abstraction has 9770 states and 15136 transitions. [2020-10-13 14:52:22,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:52:22,361 INFO L276 IsEmpty]: Start isEmpty. Operand 9770 states and 15136 transitions. [2020-10-13 14:52:22,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 14:52:22,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:22,368 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:52:22,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:52:22,368 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:22,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1465920877, now seen corresponding path program 1 times [2020-10-13 14:52:22,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:22,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190286246] [2020-10-13 14:52:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:22,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:22,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:22,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:22,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 14:52:22,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:52:22,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 575 [2020-10-13 14:52:22,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:22,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:52:22,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:52:22,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 14:52:22,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:52:23,249 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:52:23,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:23,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:23,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:23,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:23,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:23,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-13 14:52:23,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:52:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:23,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:52:23,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:52:23,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190286246] [2020-10-13 14:52:23,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:23,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:52:23,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389173721] [2020-10-13 14:52:23,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:52:23,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:23,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:52:23,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:52:23,392 INFO L87 Difference]: Start difference. First operand 9770 states and 15136 transitions. Second operand 6 states. [2020-10-13 14:52:23,616 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-13 14:52:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:52:25,615 INFO L93 Difference]: Finished difference Result 28172 states and 43764 transitions. [2020-10-13 14:52:25,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:52:25,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2020-10-13 14:52:25,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:52:25,683 INFO L225 Difference]: With dead ends: 28172 [2020-10-13 14:52:25,683 INFO L226 Difference]: Without dead ends: 18604 [2020-10-13 14:52:25,705 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:52:25,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18604 states. [2020-10-13 14:52:26,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18604 to 18602. [2020-10-13 14:52:26,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18602 states. [2020-10-13 14:52:26,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18602 states to 18602 states and 28778 transitions. [2020-10-13 14:52:26,779 INFO L78 Accepts]: Start accepts. Automaton has 18602 states and 28778 transitions. Word has length 103 [2020-10-13 14:52:26,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:52:26,779 INFO L479 AbstractCegarLoop]: Abstraction has 18602 states and 28778 transitions. [2020-10-13 14:52:26,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:52:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 18602 states and 28778 transitions. [2020-10-13 14:52:26,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 14:52:26,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:26,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:52:26,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:52:26,789 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:26,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:26,790 INFO L82 PathProgramCache]: Analyzing trace with hash -198857687, now seen corresponding path program 1 times [2020-10-13 14:52:26,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:26,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153806847] [2020-10-13 14:52:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:26,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:26,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:26,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:27,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:27,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 14:52:27,605 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:52:27,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-13 14:52:27,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:27,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:52:27,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:52:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 14:52:27,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:27,842 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:52:27,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:27,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:27,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:27,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:27,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:27,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-13 14:52:27,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:27,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:52:27,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:27,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:52:27,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:52:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:52:27,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153806847] [2020-10-13 14:52:27,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:27,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:52:27,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142989679] [2020-10-13 14:52:27,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:52:27,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:27,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:52:27,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:52:27,960 INFO L87 Difference]: Start difference. First operand 18602 states and 28778 transitions. Second operand 6 states. [2020-10-13 14:52:28,287 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-13 14:52:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:52:32,418 INFO L93 Difference]: Finished difference Result 55079 states and 85163 transitions. [2020-10-13 14:52:32,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:52:32,419 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2020-10-13 14:52:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:52:32,520 INFO L225 Difference]: With dead ends: 55079 [2020-10-13 14:52:32,520 INFO L226 Difference]: Without dead ends: 36548 [2020-10-13 14:52:32,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:52:32,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36548 states. [2020-10-13 14:52:34,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36548 to 36546. [2020-10-13 14:52:34,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36546 states. [2020-10-13 14:52:34,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36546 states to 36546 states and 56143 transitions. [2020-10-13 14:52:34,441 INFO L78 Accepts]: Start accepts. Automaton has 36546 states and 56143 transitions. Word has length 103 [2020-10-13 14:52:34,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:52:34,441 INFO L479 AbstractCegarLoop]: Abstraction has 36546 states and 56143 transitions. [2020-10-13 14:52:34,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:52:34,441 INFO L276 IsEmpty]: Start isEmpty. Operand 36546 states and 56143 transitions. [2020-10-13 14:52:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-13 14:52:34,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:34,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:52:34,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:52:34,457 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:34,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:34,457 INFO L82 PathProgramCache]: Analyzing trace with hash -2062521896, now seen corresponding path program 1 times [2020-10-13 14:52:34,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:34,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918959269] [2020-10-13 14:52:34,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:34,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:34,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:34,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:35,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:35,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 14:52:35,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:52:35,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 640 [2020-10-13 14:52:35,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:35,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:52:35,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:52:35,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 14:52:35,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:52:35,564 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:52:35,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:35,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:35,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:35,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:35,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:35,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 14:52:35,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:35,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:52:35,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:35,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:52:35,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:52:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:52:35,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918959269] [2020-10-13 14:52:35,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:35,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:52:35,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505930731] [2020-10-13 14:52:35,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:52:35,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:35,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:52:35,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:52:35,643 INFO L87 Difference]: Start difference. First operand 36546 states and 56143 transitions. Second operand 6 states. [2020-10-13 14:52:35,925 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 14:52:40,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:52:40,639 INFO L93 Difference]: Finished difference Result 109095 states and 167708 transitions. [2020-10-13 14:52:40,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:52:40,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2020-10-13 14:52:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:52:40,840 INFO L225 Difference]: With dead ends: 109095 [2020-10-13 14:52:40,840 INFO L226 Difference]: Without dead ends: 72604 [2020-10-13 14:52:40,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:52:40,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72604 states. [2020-10-13 14:52:46,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72604 to 72602. [2020-10-13 14:52:46,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72602 states. [2020-10-13 14:52:47,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72602 states to 72602 states and 110917 transitions. [2020-10-13 14:52:47,101 INFO L78 Accepts]: Start accepts. Automaton has 72602 states and 110917 transitions. Word has length 103 [2020-10-13 14:52:47,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:52:47,101 INFO L479 AbstractCegarLoop]: Abstraction has 72602 states and 110917 transitions. [2020-10-13 14:52:47,101 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:52:47,101 INFO L276 IsEmpty]: Start isEmpty. Operand 72602 states and 110917 transitions. [2020-10-13 14:52:47,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 14:52:47,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:47,121 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:52:47,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:52:47,121 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:47,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:47,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1769947760, now seen corresponding path program 1 times [2020-10-13 14:52:47,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:47,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056949492] [2020-10-13 14:52:47,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:47,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:47,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:47,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:48,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:48,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 14:52:48,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:52:48,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1518 [2020-10-13 14:52:48,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:52:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:52:48,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 14:52:48,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:49,154 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:52:49,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:49,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:49,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:49,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:49,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:49,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:49,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:52:49,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:49,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:52:49,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:49,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:52:49,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:49,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:52:49,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056949492] [2020-10-13 14:52:49,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:49,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:52:49,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416536313] [2020-10-13 14:52:49,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:52:49,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:49,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:52:49,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:52:49,215 INFO L87 Difference]: Start difference. First operand 72602 states and 110917 transitions. Second operand 9 states. [2020-10-13 14:52:49,482 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:53:14,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:14,708 INFO L93 Difference]: Finished difference Result 412849 states and 629586 transitions. [2020-10-13 14:53:14,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:53:14,709 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 104 [2020-10-13 14:53:14,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:15,446 INFO L225 Difference]: With dead ends: 412849 [2020-10-13 14:53:15,446 INFO L226 Difference]: Without dead ends: 362633 [2020-10-13 14:53:15,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:53:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362633 states. [2020-10-13 14:53:26,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362633 to 73048. [2020-10-13 14:53:26,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73048 states. [2020-10-13 14:53:26,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73048 states to 73048 states and 111521 transitions. [2020-10-13 14:53:26,563 INFO L78 Accepts]: Start accepts. Automaton has 73048 states and 111521 transitions. Word has length 104 [2020-10-13 14:53:26,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:26,564 INFO L479 AbstractCegarLoop]: Abstraction has 73048 states and 111521 transitions. [2020-10-13 14:53:26,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:53:26,564 INFO L276 IsEmpty]: Start isEmpty. Operand 73048 states and 111521 transitions. [2020-10-13 14:53:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 14:53:26,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:26,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:53:26,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:53:26,578 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:26,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:26,578 INFO L82 PathProgramCache]: Analyzing trace with hash 602757648, now seen corresponding path program 1 times [2020-10-13 14:53:26,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:26,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259343083] [2020-10-13 14:53:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:26,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:26,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:27,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:27,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:27,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 14:53:27,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:53:27,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1322 [2020-10-13 14:53:27,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:27,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:53:27,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:53:27,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-13 14:53:27,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:28,368 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:53:28,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:28,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:28,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:28,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:28,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:28,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:53:28,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:28,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:28,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:28,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:28,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:28,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259343083] [2020-10-13 14:53:28,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:28,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:53:28,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133672762] [2020-10-13 14:53:28,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:53:28,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:28,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:53:28,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:53:28,423 INFO L87 Difference]: Start difference. First operand 73048 states and 111521 transitions. Second operand 9 states. [2020-10-13 14:53:28,637 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-13 14:54:00,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:00,338 INFO L93 Difference]: Finished difference Result 384119 states and 585660 transitions. [2020-10-13 14:54:00,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:54:00,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 104 [2020-10-13 14:54:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:00,869 INFO L225 Difference]: With dead ends: 384119 [2020-10-13 14:54:00,869 INFO L226 Difference]: Without dead ends: 345624 [2020-10-13 14:54:04,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:54:04,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345624 states. [2020-10-13 14:54:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345624 to 73970. [2020-10-13 14:54:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73970 states. [2020-10-13 14:54:12,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73970 states to 73970 states and 112783 transitions. [2020-10-13 14:54:12,642 INFO L78 Accepts]: Start accepts. Automaton has 73970 states and 112783 transitions. Word has length 104 [2020-10-13 14:54:12,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:12,642 INFO L479 AbstractCegarLoop]: Abstraction has 73970 states and 112783 transitions. [2020-10-13 14:54:12,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:54:12,643 INFO L276 IsEmpty]: Start isEmpty. Operand 73970 states and 112783 transitions. [2020-10-13 14:54:12,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 14:54:12,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:12,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:54:12,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:54:12,658 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:12,659 INFO L82 PathProgramCache]: Analyzing trace with hash -286805584, now seen corresponding path program 1 times [2020-10-13 14:54:12,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:12,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647019726] [2020-10-13 14:54:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:12,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:12,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:13,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:14,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:14,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 14:54:14,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:54:14,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1769 [2020-10-13 14:54:14,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:14,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:54:14,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:54:14,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-13 14:54:14,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:14,858 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:54:14,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:14,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:14,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:14,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:14,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:14,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:14,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:54:14,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:14,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:14,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:14,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:14,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:54:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:14,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647019726] [2020-10-13 14:54:14,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:14,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:54:14,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353361673] [2020-10-13 14:54:14,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:54:14,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:14,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:54:14,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:54:14,933 INFO L87 Difference]: Start difference. First operand 73970 states and 112783 transitions. Second operand 9 states. [2020-10-13 14:54:15,220 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 189 [2020-10-13 14:54:52,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:52,794 INFO L93 Difference]: Finished difference Result 317924 states and 483229 transitions. [2020-10-13 14:54:52,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 14:54:52,795 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 104 [2020-10-13 14:54:52,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:53,207 INFO L225 Difference]: With dead ends: 317924 [2020-10-13 14:54:53,207 INFO L226 Difference]: Without dead ends: 291618 [2020-10-13 14:54:53,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-10-13 14:54:53,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291618 states. [2020-10-13 14:55:03,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291618 to 75458. [2020-10-13 14:55:03,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75458 states. [2020-10-13 14:55:03,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75458 states to 75458 states and 114901 transitions. [2020-10-13 14:55:03,287 INFO L78 Accepts]: Start accepts. Automaton has 75458 states and 114901 transitions. Word has length 104 [2020-10-13 14:55:03,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:55:03,287 INFO L479 AbstractCegarLoop]: Abstraction has 75458 states and 114901 transitions. [2020-10-13 14:55:03,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:55:03,287 INFO L276 IsEmpty]: Start isEmpty. Operand 75458 states and 114901 transitions. [2020-10-13 14:55:03,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-13 14:55:03,305 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:03,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:55:03,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:55:03,305 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:03,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:03,306 INFO L82 PathProgramCache]: Analyzing trace with hash 197544272, now seen corresponding path program 1 times [2020-10-13 14:55:03,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:03,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705363051] [2020-10-13 14:55:03,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:03,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:03,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:03,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:04,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:04,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 14:55:04,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:55:04,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1118 [2020-10-13 14:55:04,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:04,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:55:04,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:55:04,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 14:55:04,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:04,889 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-13 14:55:04,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:55:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:04,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:04,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:04,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:55:04,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:55:04,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:55:04,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:04,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:55:04,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:55:04,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:55:04,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:04,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:55:04,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705363051] [2020-10-13 14:55:04,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:55:04,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:55:04,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719244518] [2020-10-13 14:55:04,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:55:04,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:55:04,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:55:04,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:55:04,932 INFO L87 Difference]: Start difference. First operand 75458 states and 114901 transitions. Second operand 9 states. [2020-10-13 14:55:05,197 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 181