/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 09:32:56,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 09:32:56,108 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 09:32:56,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 09:32:56,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 09:32:56,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 09:32:56,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 09:32:56,170 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 09:32:56,173 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 09:32:56,176 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 09:32:56,177 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 09:32:56,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 09:32:56,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 09:32:56,181 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 09:32:56,183 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 09:32:56,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 09:32:56,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 09:32:56,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 09:32:56,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 09:32:56,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 09:32:56,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 09:32:56,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 09:32:56,202 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 09:32:56,203 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 09:32:56,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 09:32:56,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 09:32:56,206 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 09:32:56,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 09:32:56,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 09:32:56,211 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 09:32:56,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 09:32:56,212 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 09:32:56,213 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 09:32:56,213 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 09:32:56,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 09:32:56,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 09:32:56,218 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 09:32:56,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 09:32:56,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 09:32:56,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 09:32:56,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 09:32:56,221 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 09:32:56,265 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 09:32:56,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 09:32:56,268 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 09:32:56,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 09:32:56,268 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 09:32:56,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 09:32:56,269 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 09:32:56,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 09:32:56,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 09:32:56,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 09:32:56,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 09:32:56,271 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 09:32:56,271 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 09:32:56,271 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 09:32:56,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 09:32:56,272 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 09:32:56,272 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 09:32:56,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 09:32:56,272 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 09:32:56,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 09:32:56,273 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 09:32:56,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:32:56,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 09:32:56,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 09:32:56,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 09:32:56,274 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 09:32:56,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 09:32:56,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 09:32:56,274 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 09:32:56,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 09:32:56,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 09:32:56,633 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 09:32:56,637 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 09:32:56,639 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 09:32:56,640 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 09:32:56,641 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-14 09:32:56,713 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/466e679cc/eea48eb41aa54355a002e741c32339fb/FLAGf5c31bc65 [2020-10-14 09:32:57,399 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 09:32:57,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-14 09:32:57,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/466e679cc/eea48eb41aa54355a002e741c32339fb/FLAGf5c31bc65 [2020-10-14 09:32:57,582 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/466e679cc/eea48eb41aa54355a002e741c32339fb [2020-10-14 09:32:57,590 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 09:32:57,592 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 09:32:57,593 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 09:32:57,593 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 09:32:57,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 09:32:57,598 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:32:57" (1/1) ... [2020-10-14 09:32:57,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a0cc214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:32:57, skipping insertion in model container [2020-10-14 09:32:57,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:32:57" (1/1) ... [2020-10-14 09:32:57,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 09:32:57,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 09:32:58,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:32:58,722 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 09:32:59,383 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 09:32:59,422 INFO L208 MainTranslator]: Completed translation [2020-10-14 09:32:59,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:32:59 WrapperNode [2020-10-14 09:32:59,424 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 09:32:59,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 09:32:59,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 09:32:59,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 09:32:59,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:32:59" (1/1) ... [2020-10-14 09:32:59,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:32:59" (1/1) ... [2020-10-14 09:32:59,495 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:32:59" (1/1) ... [2020-10-14 09:32:59,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:32:59" (1/1) ... [2020-10-14 09:32:59,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:32:59" (1/1) ... [2020-10-14 09:32:59,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:32:59" (1/1) ... [2020-10-14 09:32:59,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:32:59" (1/1) ... [2020-10-14 09:32:59,615 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 09:32:59,616 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 09:32:59,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 09:32:59,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 09:32:59,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:32:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 09:32:59,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 09:32:59,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 09:32:59,692 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 09:32:59,692 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 09:32:59,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 09:32:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 09:32:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 09:32:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 09:32:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 09:32:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 09:32:59,693 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 09:32:59,694 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 09:32:59,694 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 09:32:59,694 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 09:32:59,694 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 09:32:59,694 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-14 09:32:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 09:32:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 09:32:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 09:32:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 09:32:59,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 09:33:02,066 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 09:33:02,066 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 09:33:02,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:33:02 BoogieIcfgContainer [2020-10-14 09:33:02,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 09:33:02,078 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 09:33:02,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 09:33:02,082 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 09:33:02,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:32:57" (1/3) ... [2020-10-14 09:33:02,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a24237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:33:02, skipping insertion in model container [2020-10-14 09:33:02,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:32:59" (2/3) ... [2020-10-14 09:33:02,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71a24237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:33:02, skipping insertion in model container [2020-10-14 09:33:02,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:33:02" (3/3) ... [2020-10-14 09:33:02,086 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-14 09:33:02,097 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 09:33:02,106 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 09:33:02,122 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 09:33:02,154 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 09:33:02,154 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 09:33:02,154 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 09:33:02,155 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 09:33:02,155 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 09:33:02,155 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 09:33:02,155 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 09:33:02,155 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 09:33:02,220 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2020-10-14 09:33:02,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-10-14 09:33:02,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:33:02,254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:33:02,255 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:33:02,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:33:02,263 INFO L82 PathProgramCache]: Analyzing trace with hash -2046950044, now seen corresponding path program 1 times [2020-10-14 09:33:02,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:33:02,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423401784] [2020-10-14 09:33:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:33:03,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:33:03,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:05,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:05,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:05,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:06,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:06,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:06,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:06,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:06,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:07,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:07,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:07,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:07,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:07,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:08,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:08,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:08,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:33:08,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 330 [2020-10-14 09:33:08,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 09:33:08,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-14 09:33:08,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:33:08,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:33:08,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:33:08,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:33:08,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-14 09:33:08,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 09:33:09,207 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:33:09,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:33:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:33:09,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:09,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:33:09,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:33:09,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:33:09,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-14 09:33:09,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:33:09,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:33:09,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:33:09,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:33:09,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:33:09,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:33:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:33:09,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423401784] [2020-10-14 09:33:09,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:33:09,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:33:09,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001388274] [2020-10-14 09:33:09,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:33:09,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:33:09,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:33:09,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:33:09,566 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 5 states. [2020-10-14 09:33:17,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:33:17,129 INFO L93 Difference]: Finished difference Result 2334 states and 4149 transitions. [2020-10-14 09:33:17,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 09:33:17,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2020-10-14 09:33:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:33:17,160 INFO L225 Difference]: With dead ends: 2334 [2020-10-14 09:33:17,160 INFO L226 Difference]: Without dead ends: 1544 [2020-10-14 09:33:17,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:33:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2020-10-14 09:33:17,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1542. [2020-10-14 09:33:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2020-10-14 09:33:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2399 transitions. [2020-10-14 09:33:17,333 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2399 transitions. Word has length 324 [2020-10-14 09:33:17,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:33:17,336 INFO L479 AbstractCegarLoop]: Abstraction has 1542 states and 2399 transitions. [2020-10-14 09:33:17,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:33:17,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2399 transitions. [2020-10-14 09:33:17,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-14 09:33:17,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:33:17,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:33:17,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 09:33:17,348 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:33:17,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:33:17,348 INFO L82 PathProgramCache]: Analyzing trace with hash 93964340, now seen corresponding path program 1 times [2020-10-14 09:33:17,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:33:17,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206404014] [2020-10-14 09:33:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:33:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:33:17,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:17,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:17,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:18,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:18,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:18,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:18,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:18,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:18,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:18,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:19,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:19,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:19,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:20,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:22,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:33:22,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 332 [2020-10-14 09:33:22,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 09:33:22,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-14 09:33:22,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:33:22,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:33:22,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:33:22,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 09:33:22,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 220 [2020-10-14 09:33:22,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:33:23,222 WARN L193 SmtUtils]: Spent 425.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:33:23,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:33:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:33:23,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:23,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:33:23,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:33:23,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:33:23,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-14 09:33:23,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:33:23,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:33:23,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:33:23,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:33:23,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:33:23,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:33:23,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:33:23,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206404014] [2020-10-14 09:33:23,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:33:23,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:33:23,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489753841] [2020-10-14 09:33:23,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:33:23,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:33:23,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:33:23,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:33:23,543 INFO L87 Difference]: Start difference. First operand 1542 states and 2399 transitions. Second operand 4 states. [2020-10-14 09:33:33,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:33:33,096 INFO L93 Difference]: Finished difference Result 4412 states and 6828 transitions. [2020-10-14 09:33:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:33:33,097 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-10-14 09:33:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:33:33,128 INFO L225 Difference]: With dead ends: 4412 [2020-10-14 09:33:33,129 INFO L226 Difference]: Without dead ends: 3010 [2020-10-14 09:33:33,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:33:33,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2020-10-14 09:33:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 3008. [2020-10-14 09:33:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3008 states. [2020-10-14 09:33:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4654 transitions. [2020-10-14 09:33:33,336 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4654 transitions. Word has length 326 [2020-10-14 09:33:33,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:33:33,339 INFO L479 AbstractCegarLoop]: Abstraction has 3008 states and 4654 transitions. [2020-10-14 09:33:33,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:33:33,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4654 transitions. [2020-10-14 09:33:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-14 09:33:33,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:33:33,358 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:33:33,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 09:33:33,359 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:33:33,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:33:33,360 INFO L82 PathProgramCache]: Analyzing trace with hash 140980473, now seen corresponding path program 1 times [2020-10-14 09:33:33,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:33:33,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025727543] [2020-10-14 09:33:33,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:33:33,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:33:33,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:33,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:33,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:34,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:34,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:34,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:34,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:34,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:34,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:35,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:35,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:35,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:35,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:38,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:33:38,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 332 [2020-10-14 09:33:38,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 09:33:38,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-14 09:33:38,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:33:38,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:33:38,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:33:38,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 09:33:38,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 09:33:38,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:33:39,009 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:33:39,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:33:39,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:33:39,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:39,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:33:39,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:33:39,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:33:39,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-14 09:33:39,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:33:39,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:33:39,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:33:39,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:33:39,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:33:39,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:33:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:33:39,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025727543] [2020-10-14 09:33:39,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:33:39,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:33:39,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660996586] [2020-10-14 09:33:39,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:33:39,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:33:39,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:33:39,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:33:39,194 INFO L87 Difference]: Start difference. First operand 3008 states and 4654 transitions. Second operand 4 states. [2020-10-14 09:33:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:33:43,689 INFO L93 Difference]: Finished difference Result 8865 states and 13686 transitions. [2020-10-14 09:33:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:33:43,690 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2020-10-14 09:33:43,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:33:43,720 INFO L225 Difference]: With dead ends: 8865 [2020-10-14 09:33:43,720 INFO L226 Difference]: Without dead ends: 5884 [2020-10-14 09:33:43,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:33:43,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5884 states. [2020-10-14 09:33:43,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5884 to 3019. [2020-10-14 09:33:43,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3019 states. [2020-10-14 09:33:43,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 4669 transitions. [2020-10-14 09:33:43,902 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 4669 transitions. Word has length 326 [2020-10-14 09:33:43,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:33:43,903 INFO L479 AbstractCegarLoop]: Abstraction has 3019 states and 4669 transitions. [2020-10-14 09:33:43,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:33:43,903 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 4669 transitions. [2020-10-14 09:33:43,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-14 09:33:43,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:33:43,915 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:33:43,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 09:33:43,916 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:33:43,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:33:43,916 INFO L82 PathProgramCache]: Analyzing trace with hash -731919463, now seen corresponding path program 1 times [2020-10-14 09:33:43,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:33:43,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301826601] [2020-10-14 09:33:43,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:33:43,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:33:44,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:44,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:44,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:44,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:45,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:45,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:45,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:45,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:45,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:45,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:45,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:45,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:46,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:46,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:46,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:48,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:33:48,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-14 09:33:48,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-14 09:33:48,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-14 09:33:48,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:33:48,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:33:48,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:33:48,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-14 09:33:48,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 09:33:48,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:33:49,451 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:33:49,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:33:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:33:49,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:49,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:33:49,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:33:49,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:33:49,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:33:49,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:33:49,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:33:49,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:33:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:33:49,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:33:49,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:33:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:33:49,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301826601] [2020-10-14 09:33:49,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:33:49,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:33:49,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584713175] [2020-10-14 09:33:49,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:33:49,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:33:49,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:33:49,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:33:49,636 INFO L87 Difference]: Start difference. First operand 3019 states and 4669 transitions. Second operand 4 states. [2020-10-14 09:33:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:33:57,529 INFO L93 Difference]: Finished difference Result 8962 states and 13853 transitions. [2020-10-14 09:33:57,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:33:57,530 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-14 09:33:57,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:33:57,556 INFO L225 Difference]: With dead ends: 8962 [2020-10-14 09:33:57,557 INFO L226 Difference]: Without dead ends: 5993 [2020-10-14 09:33:57,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:33:57,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5993 states. [2020-10-14 09:33:57,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5993 to 3035. [2020-10-14 09:33:57,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3035 states. [2020-10-14 09:33:57,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3035 states to 3035 states and 4688 transitions. [2020-10-14 09:33:57,734 INFO L78 Accepts]: Start accepts. Automaton has 3035 states and 4688 transitions. Word has length 327 [2020-10-14 09:33:57,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:33:57,735 INFO L479 AbstractCegarLoop]: Abstraction has 3035 states and 4688 transitions. [2020-10-14 09:33:57,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:33:57,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3035 states and 4688 transitions. [2020-10-14 09:33:57,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-14 09:33:57,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:33:57,747 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:33:57,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 09:33:57,748 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:33:57,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:33:57,748 INFO L82 PathProgramCache]: Analyzing trace with hash -524970257, now seen corresponding path program 1 times [2020-10-14 09:33:57,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:33:57,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146686468] [2020-10-14 09:33:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:33:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:33:57,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:58,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:58,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:58,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:58,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:58,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:58,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:58,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:58,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:59,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:59,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:59,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:59,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:59,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:33:59,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:02,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:02,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:02,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:34:02,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-14 09:34:02,880 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-14 09:34:02,880 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-14 09:34:02,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:34:02,880 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:34:02,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:34:02,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 09:34:02,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-14 09:34:02,881 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 09:34:03,403 WARN L193 SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:34:03,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:34:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:34:03,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:03,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:34:03,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:34:03,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:34:03,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:34:03,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:34:03,427 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:34:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:34:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:34:03,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:34:03,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:34:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:34:03,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146686468] [2020-10-14 09:34:03,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:34:03,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:34:03,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495647555] [2020-10-14 09:34:03,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:34:03,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:34:03,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:34:03,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:34:03,548 INFO L87 Difference]: Start difference. First operand 3035 states and 4688 transitions. Second operand 4 states. [2020-10-14 09:34:11,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:34:11,207 INFO L93 Difference]: Finished difference Result 8732 states and 13445 transitions. [2020-10-14 09:34:11,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:34:11,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-10-14 09:34:11,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:34:11,228 INFO L225 Difference]: With dead ends: 8732 [2020-10-14 09:34:11,229 INFO L226 Difference]: Without dead ends: 5894 [2020-10-14 09:34:11,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:34:11,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5894 states. [2020-10-14 09:34:11,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5894 to 5892. [2020-10-14 09:34:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5892 states. [2020-10-14 09:34:11,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5892 states to 5892 states and 9048 transitions. [2020-10-14 09:34:11,508 INFO L78 Accepts]: Start accepts. Automaton has 5892 states and 9048 transitions. Word has length 328 [2020-10-14 09:34:11,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:34:11,511 INFO L479 AbstractCegarLoop]: Abstraction has 5892 states and 9048 transitions. [2020-10-14 09:34:11,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:34:11,512 INFO L276 IsEmpty]: Start isEmpty. Operand 5892 states and 9048 transitions. [2020-10-14 09:34:11,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-14 09:34:11,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:34:11,528 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:34:11,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 09:34:11,528 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:34:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:34:11,530 INFO L82 PathProgramCache]: Analyzing trace with hash 415455500, now seen corresponding path program 1 times [2020-10-14 09:34:11,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:34:11,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587538600] [2020-10-14 09:34:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:34:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:34:11,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:12,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:12,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:12,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:12,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:12,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:12,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:12,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:12,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:12,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:13,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:13,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:13,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:13,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:14,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:14,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:16,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:34:16,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-14 09:34:16,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 09:34:16,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-14 09:34:16,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:34:16,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:34:16,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:34:16,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:34:16,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-14 09:34:16,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:34:17,322 WARN L193 SmtUtils]: Spent 447.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:34:17,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:34:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:34:17,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:17,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:34:17,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:34:17,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:34:17,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:34:17,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:34:17,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:34:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:34:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:34:17,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:34:17,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:34:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:34:17,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587538600] [2020-10-14 09:34:17,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:34:17,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:34:17,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156118626] [2020-10-14 09:34:17,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:34:17,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:34:17,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:34:17,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:34:17,479 INFO L87 Difference]: Start difference. First operand 5892 states and 9048 transitions. Second operand 5 states. [2020-10-14 09:34:24,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:34:24,349 INFO L93 Difference]: Finished difference Result 16949 states and 25905 transitions. [2020-10-14 09:34:24,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:34:24,351 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 328 [2020-10-14 09:34:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:34:24,388 INFO L225 Difference]: With dead ends: 16949 [2020-10-14 09:34:24,388 INFO L226 Difference]: Without dead ends: 11331 [2020-10-14 09:34:24,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:34:24,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11331 states. [2020-10-14 09:34:24,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11331 to 11329. [2020-10-14 09:34:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11329 states. [2020-10-14 09:34:24,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11329 states to 11329 states and 17231 transitions. [2020-10-14 09:34:24,948 INFO L78 Accepts]: Start accepts. Automaton has 11329 states and 17231 transitions. Word has length 328 [2020-10-14 09:34:24,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:34:24,949 INFO L479 AbstractCegarLoop]: Abstraction has 11329 states and 17231 transitions. [2020-10-14 09:34:24,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:34:24,949 INFO L276 IsEmpty]: Start isEmpty. Operand 11329 states and 17231 transitions. [2020-10-14 09:34:24,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-14 09:34:24,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:34:24,975 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:34:24,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 09:34:24,976 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:34:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:34:24,976 INFO L82 PathProgramCache]: Analyzing trace with hash -587805470, now seen corresponding path program 1 times [2020-10-14 09:34:24,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:34:24,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975012383] [2020-10-14 09:34:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:34:25,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:34:25,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:25,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:25,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:25,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:25,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:25,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:25,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:25,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:26,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:26,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:26,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:26,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:26,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:26,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:27,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:27,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:30,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:34:30,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 336 [2020-10-14 09:34:30,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 09:34:30,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-14 09:34:30,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:34:30,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:34:30,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:34:30,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-14 09:34:30,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-14 09:34:30,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:34:30,623 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:34:30,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:34:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:34:30,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:30,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:34:30,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:34:30,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:34:30,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-14 09:34:30,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:34:30,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:34:30,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:34:30,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:34:30,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:34:30,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:34:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:34:30,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975012383] [2020-10-14 09:34:30,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:34:30,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:34:30,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916288291] [2020-10-14 09:34:30,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:34:30,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:34:30,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:34:30,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:34:30,822 INFO L87 Difference]: Start difference. First operand 11329 states and 17231 transitions. Second operand 4 states. [2020-10-14 09:34:39,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:34:39,094 INFO L93 Difference]: Finished difference Result 33157 states and 50290 transitions. [2020-10-14 09:34:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:34:39,095 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 330 [2020-10-14 09:34:39,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:34:39,134 INFO L225 Difference]: With dead ends: 33157 [2020-10-14 09:34:39,135 INFO L226 Difference]: Without dead ends: 22243 [2020-10-14 09:34:39,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:34:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22243 states. [2020-10-14 09:34:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22243 to 22241. [2020-10-14 09:34:40,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22241 states. [2020-10-14 09:34:40,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22241 states to 22241 states and 33606 transitions. [2020-10-14 09:34:40,092 INFO L78 Accepts]: Start accepts. Automaton has 22241 states and 33606 transitions. Word has length 330 [2020-10-14 09:34:40,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:34:40,092 INFO L479 AbstractCegarLoop]: Abstraction has 22241 states and 33606 transitions. [2020-10-14 09:34:40,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:34:40,093 INFO L276 IsEmpty]: Start isEmpty. Operand 22241 states and 33606 transitions. [2020-10-14 09:34:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-14 09:34:40,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:34:40,133 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:34:40,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 09:34:40,134 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:34:40,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:34:40,134 INFO L82 PathProgramCache]: Analyzing trace with hash -491858715, now seen corresponding path program 1 times [2020-10-14 09:34:40,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:34:40,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438565969] [2020-10-14 09:34:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:34:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:34:40,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:40,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:40,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:41,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:41,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:41,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:41,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:41,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:41,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:41,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:41,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:41,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:41,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:42,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:42,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:42,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:45,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:34:45,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 336 [2020-10-14 09:34:45,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 09:34:45,337 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 09:34:45,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:34:45,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:34:45,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:34:45,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:34:45,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-14 09:34:45,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:34:45,862 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:34:45,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:34:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:34:45,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:45,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:34:45,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:34:45,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:34:45,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:34:45,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:34:45,881 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:34:45,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:34:45,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:34:45,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:34:45,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:34:46,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:34:46,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438565969] [2020-10-14 09:34:46,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:34:46,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:34:46,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909591384] [2020-10-14 09:34:46,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:34:46,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:34:46,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:34:46,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:34:46,122 INFO L87 Difference]: Start difference. First operand 22241 states and 33606 transitions. Second operand 5 states. [2020-10-14 09:34:54,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:34:54,082 INFO L93 Difference]: Finished difference Result 65236 states and 98328 transitions. [2020-10-14 09:34:54,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:34:54,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-10-14 09:34:54,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:34:54,157 INFO L225 Difference]: With dead ends: 65236 [2020-10-14 09:34:54,157 INFO L226 Difference]: Without dead ends: 43070 [2020-10-14 09:34:54,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:34:54,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43070 states. [2020-10-14 09:34:55,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43070 to 43068. [2020-10-14 09:34:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43068 states. [2020-10-14 09:34:55,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43068 states to 43068 states and 64452 transitions. [2020-10-14 09:34:55,474 INFO L78 Accepts]: Start accepts. Automaton has 43068 states and 64452 transitions. Word has length 330 [2020-10-14 09:34:55,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:34:55,475 INFO L479 AbstractCegarLoop]: Abstraction has 43068 states and 64452 transitions. [2020-10-14 09:34:55,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:34:55,475 INFO L276 IsEmpty]: Start isEmpty. Operand 43068 states and 64452 transitions. [2020-10-14 09:34:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-10-14 09:34:55,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:34:55,520 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:34:55,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 09:34:55,520 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:34:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:34:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1136318819, now seen corresponding path program 1 times [2020-10-14 09:34:55,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:34:55,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868737611] [2020-10-14 09:34:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:34:55,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:34:55,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:57,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:57,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:57,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:57,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:57,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:58,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:58,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:58,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:58,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:58,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:58,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:58,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:59,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:34:59,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:00,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:00,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:00,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 336 [2020-10-14 09:35:00,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 09:35:00,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-14 09:35:00,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:00,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:00,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:35:00,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:35:00,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-14 09:35:00,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:35:01,219 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:35:01,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:35:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:01,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:01,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:01,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:35:01,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:35:01,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-14 09:35:01,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:01,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:01,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:35:01,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:35:01,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:35:01,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:35:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:35:01,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868737611] [2020-10-14 09:35:01,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:35:01,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:35:01,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515788290] [2020-10-14 09:35:01,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:35:01,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:35:01,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:35:01,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:35:01,367 INFO L87 Difference]: Start difference. First operand 43068 states and 64452 transitions. Second operand 5 states. [2020-10-14 09:35:09,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:35:09,527 INFO L93 Difference]: Finished difference Result 90312 states and 134618 transitions. [2020-10-14 09:35:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:35:09,528 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2020-10-14 09:35:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:35:09,598 INFO L225 Difference]: With dead ends: 90312 [2020-10-14 09:35:09,598 INFO L226 Difference]: Without dead ends: 48918 [2020-10-14 09:35:09,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:35:09,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48918 states. [2020-10-14 09:35:11,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48918 to 42828. [2020-10-14 09:35:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42828 states. [2020-10-14 09:35:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42828 states to 42828 states and 63956 transitions. [2020-10-14 09:35:11,310 INFO L78 Accepts]: Start accepts. Automaton has 42828 states and 63956 transitions. Word has length 330 [2020-10-14 09:35:11,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:35:11,310 INFO L479 AbstractCegarLoop]: Abstraction has 42828 states and 63956 transitions. [2020-10-14 09:35:11,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:35:11,311 INFO L276 IsEmpty]: Start isEmpty. Operand 42828 states and 63956 transitions. [2020-10-14 09:35:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-10-14 09:35:11,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:35:11,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:35:11,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 09:35:11,347 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:35:11,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:35:11,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1636222490, now seen corresponding path program 1 times [2020-10-14 09:35:11,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:35:11,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702333161] [2020-10-14 09:35:11,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:35:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:11,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:11,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:11,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:11,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:11,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:11,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:13,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:13,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:13,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:13,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:13,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:13,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:13,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:14,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:14,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:15,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:15,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:16,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:16,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:16,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 338 [2020-10-14 09:35:16,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 09:35:16,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-14 09:35:16,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:16,395 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:16,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:35:16,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 09:35:16,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 09:35:16,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:35:16,866 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:35:16,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:35:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:16,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:16,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:16,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:35:16,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:35:16,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:35:16,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:16,883 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:16,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:35:16,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:35:16,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:35:16,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:35:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:35:17,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702333161] [2020-10-14 09:35:17,175 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:35:17,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:35:17,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570661139] [2020-10-14 09:35:17,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:35:17,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:35:17,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:35:17,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:35:17,176 INFO L87 Difference]: Start difference. First operand 42828 states and 63956 transitions. Second operand 4 states. [2020-10-14 09:35:24,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:35:24,493 INFO L93 Difference]: Finished difference Result 125088 states and 186068 transitions. [2020-10-14 09:35:24,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:35:24,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 332 [2020-10-14 09:35:24,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:35:24,597 INFO L225 Difference]: With dead ends: 125088 [2020-10-14 09:35:24,597 INFO L226 Difference]: Without dead ends: 83958 [2020-10-14 09:35:24,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:35:24,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83958 states. [2020-10-14 09:35:26,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83958 to 43052. [2020-10-14 09:35:26,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43052 states. [2020-10-14 09:35:26,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43052 states to 43052 states and 64260 transitions. [2020-10-14 09:35:26,366 INFO L78 Accepts]: Start accepts. Automaton has 43052 states and 64260 transitions. Word has length 332 [2020-10-14 09:35:26,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:35:26,367 INFO L479 AbstractCegarLoop]: Abstraction has 43052 states and 64260 transitions. [2020-10-14 09:35:26,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:35:26,367 INFO L276 IsEmpty]: Start isEmpty. Operand 43052 states and 64260 transitions. [2020-10-14 09:35:26,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-14 09:35:26,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:35:26,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:35:26,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 09:35:26,409 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:35:26,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:35:26,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1275905604, now seen corresponding path program 1 times [2020-10-14 09:35:26,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:35:26,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299202729] [2020-10-14 09:35:26,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:35:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:26,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:26,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:26,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:26,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:26,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:28,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:28,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:28,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:28,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:29,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:29,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:29,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:29,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:29,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:30,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:30,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:30,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:31,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:31,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:31,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-14 09:35:31,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-14 09:35:31,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 09:35:31,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:31,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:31,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:35:31,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-14 09:35:31,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 09:35:31,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:35:31,926 WARN L193 SmtUtils]: Spent 419.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:35:31,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:35:31,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:31,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:31,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:31,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:35:31,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:35:31,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-14 09:35:31,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:31,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:31,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:35:31,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:35:31,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:35:31,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:35:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:35:32,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299202729] [2020-10-14 09:35:32,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:35:32,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:35:32,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631216872] [2020-10-14 09:35:32,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:35:32,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:35:32,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:35:32,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:35:32,015 INFO L87 Difference]: Start difference. First operand 43052 states and 64260 transitions. Second operand 4 states. [2020-10-14 09:35:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:35:39,655 INFO L93 Difference]: Finished difference Result 125536 states and 186682 transitions. [2020-10-14 09:35:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:35:39,656 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-10-14 09:35:39,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:35:39,738 INFO L225 Difference]: With dead ends: 125536 [2020-10-14 09:35:39,738 INFO L226 Difference]: Without dead ends: 84230 [2020-10-14 09:35:39,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:35:39,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84230 states. [2020-10-14 09:35:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84230 to 43364. [2020-10-14 09:35:41,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43364 states. [2020-10-14 09:35:41,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43364 states to 43364 states and 64692 transitions. [2020-10-14 09:35:41,906 INFO L78 Accepts]: Start accepts. Automaton has 43364 states and 64692 transitions. Word has length 333 [2020-10-14 09:35:41,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:35:41,907 INFO L479 AbstractCegarLoop]: Abstraction has 43364 states and 64692 transitions. [2020-10-14 09:35:41,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:35:41,907 INFO L276 IsEmpty]: Start isEmpty. Operand 43364 states and 64692 transitions. [2020-10-14 09:35:41,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-14 09:35:41,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:35:41,939 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:35:41,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 09:35:41,939 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:35:41,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:35:41,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1442195181, now seen corresponding path program 1 times [2020-10-14 09:35:41,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:35:41,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831914043] [2020-10-14 09:35:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:35:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:42,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:42,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:42,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:42,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:42,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:42,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:42,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:44,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:44,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:44,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:44,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:44,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:44,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:44,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:44,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:45,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:45,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:45,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:45,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:46,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:46,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:47,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:47,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 340 [2020-10-14 09:35:47,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-14 09:35:47,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-14 09:35:47,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:47,095 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:47,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 09:35:47,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 09:35:47,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-14 09:35:47,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:35:47,609 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:35:47,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:35:47,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:35:47,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:35:47,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:35:47,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:35:47,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:35:47,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 09:35:47,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:35:47,625 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:35:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:35:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:35:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:35:47,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:35:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:35:47,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831914043] [2020-10-14 09:35:47,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:35:47,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 09:35:47,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005203424] [2020-10-14 09:35:47,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 09:35:47,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:35:47,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 09:35:47,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 09:35:47,863 INFO L87 Difference]: Start difference. First operand 43364 states and 64692 transitions. Second operand 5 states. [2020-10-14 09:35:58,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:35:58,203 INFO L93 Difference]: Finished difference Result 127444 states and 189663 transitions. [2020-10-14 09:35:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 09:35:58,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2020-10-14 09:35:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:35:58,284 INFO L225 Difference]: With dead ends: 127444 [2020-10-14 09:35:58,285 INFO L226 Difference]: Without dead ends: 84416 [2020-10-14 09:35:58,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 09:35:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84416 states. [2020-10-14 09:36:04,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84416 to 84414. [2020-10-14 09:36:04,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84414 states. [2020-10-14 09:36:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84414 states to 84414 states and 124779 transitions. [2020-10-14 09:36:04,125 INFO L78 Accepts]: Start accepts. Automaton has 84414 states and 124779 transitions. Word has length 334 [2020-10-14 09:36:04,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:36:04,125 INFO L479 AbstractCegarLoop]: Abstraction has 84414 states and 124779 transitions. [2020-10-14 09:36:04,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 09:36:04,125 INFO L276 IsEmpty]: Start isEmpty. Operand 84414 states and 124779 transitions. [2020-10-14 09:36:04,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-10-14 09:36:04,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:36:04,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:36:04,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 09:36:04,187 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:36:04,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:36:04,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1541827018, now seen corresponding path program 1 times [2020-10-14 09:36:04,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:36:04,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458727724] [2020-10-14 09:36:04,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:36:04,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:04,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:04,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:04,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:04,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:04,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:04,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:04,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:04,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:05,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:06,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:06,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:06,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:06,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:06,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:06,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:07,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:07,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:07,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:07,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:07,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:08,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:08,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:09,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:09,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 342 [2020-10-14 09:36:09,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-14 09:36:09,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-14 09:36:09,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:09,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:36:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 09:36:09,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 09:36:09,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:36:09,722 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:36:09,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:36:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:09,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:09,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:09,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:36:09,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:36:09,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 09:36:09,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:09,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:09,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:36:09,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:36:09,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:36:09,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:36:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:36:09,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458727724] [2020-10-14 09:36:09,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:36:09,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:36:09,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803648360] [2020-10-14 09:36:09,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:36:09,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:36:09,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:36:09,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:36:09,802 INFO L87 Difference]: Start difference. First operand 84414 states and 124779 transitions. Second operand 4 states. [2020-10-14 09:36:22,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 09:36:22,053 INFO L93 Difference]: Finished difference Result 251937 states and 372227 transitions. [2020-10-14 09:36:22,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 09:36:22,054 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 336 [2020-10-14 09:36:22,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 09:36:22,232 INFO L225 Difference]: With dead ends: 251937 [2020-10-14 09:36:22,232 INFO L226 Difference]: Without dead ends: 168018 [2020-10-14 09:36:22,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:36:22,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168018 states. [2020-10-14 09:36:28,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168018 to 84536. [2020-10-14 09:36:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84536 states. [2020-10-14 09:36:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84536 states to 84536 states and 124934 transitions. [2020-10-14 09:36:29,058 INFO L78 Accepts]: Start accepts. Automaton has 84536 states and 124934 transitions. Word has length 336 [2020-10-14 09:36:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 09:36:29,058 INFO L479 AbstractCegarLoop]: Abstraction has 84536 states and 124934 transitions. [2020-10-14 09:36:29,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 09:36:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 84536 states and 124934 transitions. [2020-10-14 09:36:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-10-14 09:36:29,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 09:36:29,119 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 09:36:29,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 09:36:29,120 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 09:36:29,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 09:36:29,120 INFO L82 PathProgramCache]: Analyzing trace with hash 695043656, now seen corresponding path program 1 times [2020-10-14 09:36:29,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 09:36:29,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790599338] [2020-10-14 09:36:29,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 09:36:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:29,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:29,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:29,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:29,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:29,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:29,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:34,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:34,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-14 09:36:34,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 09:36:34,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-14 09:36:34,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:34,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:34,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 09:36:34,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 09:36:34,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 09:36:34,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:36:34,650 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 283 [2020-10-14 09:36:34,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 09:36:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 09:36:34,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 09:36:34,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 09:36:34,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 09:36:34,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 09:36:34,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 09:36:34,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 09:36:34,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 09:36:34,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 09:36:34,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 09:36:34,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 09:36:34,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 09:36:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 09:36:34,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790599338] [2020-10-14 09:36:34,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 09:36:34,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 09:36:34,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743867284] [2020-10-14 09:36:34,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 09:36:34,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 09:36:34,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 09:36:34,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 09:36:34,731 INFO L87 Difference]: Start difference. First operand 84536 states and 124934 transitions. Second operand 4 states.