./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5bb93fd4b075e0d529f2b9259613e2b396c2a961 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 04:25:48,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 04:25:48,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 04:25:48,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 04:25:48,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 04:25:48,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 04:25:48,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 04:25:48,638 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 04:25:48,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 04:25:48,643 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 04:25:48,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 04:25:48,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 04:25:48,648 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 04:25:48,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 04:25:48,652 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 04:25:48,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 04:25:48,655 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 04:25:48,656 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 04:25:48,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 04:25:48,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 04:25:48,664 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 04:25:48,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 04:25:48,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 04:25:48,667 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 04:25:48,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 04:25:48,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 04:25:48,673 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 04:25:48,675 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 04:25:48,675 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 04:25:48,676 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 04:25:48,676 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 04:25:48,677 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 04:25:48,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 04:25:48,679 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 04:25:48,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 04:25:48,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 04:25:48,680 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 04:25:48,681 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 04:25:48,681 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 04:25:48,682 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 04:25:48,683 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 04:25:48,684 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 04:25:48,718 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 04:25:48,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 04:25:48,720 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 04:25:48,720 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 04:25:48,722 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 04:25:48,722 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 04:25:48,722 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 04:25:48,722 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 04:25:48,722 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 04:25:48,723 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 04:25:48,723 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 04:25:48,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 04:25:48,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 04:25:48,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 04:25:48,724 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 04:25:48,724 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 04:25:48,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 04:25:48,725 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 04:25:48,725 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 04:25:48,725 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 04:25:48,725 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 04:25:48,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 04:25:48,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 04:25:48,726 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 04:25:48,726 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 04:25:48,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 04:25:48,727 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 04:25:48,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 04:25:48,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 04:25:48,727 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 04:25:48,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bb93fd4b075e0d529f2b9259613e2b396c2a961 [2021-08-26 04:25:49,043 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 04:25:49,064 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 04:25:49,067 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 04:25:49,068 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 04:25:49,068 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 04:25:49,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2021-08-26 04:25:49,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/870ada34a/55d0aedb603a40be8c9622ae53395599/FLAGc25e3320b [2021-08-26 04:25:49,581 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 04:25:49,583 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c [2021-08-26 04:25:49,589 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/870ada34a/55d0aedb603a40be8c9622ae53395599/FLAGc25e3320b [2021-08-26 04:25:49,996 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/870ada34a/55d0aedb603a40be8c9622ae53395599 [2021-08-26 04:25:49,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 04:25:50,001 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 04:25:50,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 04:25:50,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 04:25:50,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 04:25:50,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:25:49" (1/1) ... [2021-08-26 04:25:50,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17be60bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:25:50, skipping insertion in model container [2021-08-26 04:25:50,019 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:25:49" (1/1) ... [2021-08-26 04:25:50,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 04:25:50,038 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 04:25:50,127 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2021-08-26 04:25:50,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 04:25:50,145 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 04:25:50,155 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested_delay_nd.c[465,478] [2021-08-26 04:25:50,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 04:25:50,171 INFO L208 MainTranslator]: Completed translation [2021-08-26 04:25:50,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:25:50 WrapperNode [2021-08-26 04:25:50,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 04:25:50,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 04:25:50,173 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 04:25:50,173 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 04:25:50,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:25:50" (1/1) ... [2021-08-26 04:25:50,183 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:25:50" (1/1) ... [2021-08-26 04:25:50,197 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 04:25:50,198 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 04:25:50,198 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 04:25:50,198 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 04:25:50,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:25:50" (1/1) ... [2021-08-26 04:25:50,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:25:50" (1/1) ... [2021-08-26 04:25:50,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:25:50" (1/1) ... [2021-08-26 04:25:50,206 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:25:50" (1/1) ... [2021-08-26 04:25:50,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:25:50" (1/1) ... [2021-08-26 04:25:50,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:25:50" (1/1) ... [2021-08-26 04:25:50,212 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:25:50" (1/1) ... [2021-08-26 04:25:50,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 04:25:50,214 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 04:25:50,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 04:25:50,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 04:25:50,215 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:25:50" (1/1) ... [2021-08-26 04:25:50,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 04:25:50,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:25:50,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 04:25:50,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 04:25:50,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 04:25:50,288 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 04:25:50,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 04:25:50,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 04:25:50,571 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 04:25:50,572 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-08-26 04:25:50,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:25:50 BoogieIcfgContainer [2021-08-26 04:25:50,573 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 04:25:50,575 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 04:25:50,575 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 04:25:50,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 04:25:50,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:25:49" (1/3) ... [2021-08-26 04:25:50,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b702ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:25:50, skipping insertion in model container [2021-08-26 04:25:50,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:25:50" (2/3) ... [2021-08-26 04:25:50,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b702ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:25:50, skipping insertion in model container [2021-08-26 04:25:50,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:25:50" (3/3) ... [2021-08-26 04:25:50,585 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_nd.c [2021-08-26 04:25:50,589 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 04:25:50,590 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 04:25:50,622 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 04:25:50,627 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 04:25:50,627 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 04:25:50,638 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:50,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 04:25:50,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:50,642 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:50,643 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:50,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:50,647 INFO L82 PathProgramCache]: Analyzing trace with hash -493598204, now seen corresponding path program 1 times [2021-08-26 04:25:50,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:50,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256524242] [2021-08-26 04:25:50,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:50,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:50,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:50,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256524242] [2021-08-26 04:25:50,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256524242] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:25:50,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:25:50,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 04:25:50,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434664762] [2021-08-26 04:25:50,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 04:25:50,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:50,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 04:25:50,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 04:25:50,792 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:50,803 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2021-08-26 04:25:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 04:25:50,804 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-26 04:25:50,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:50,810 INFO L225 Difference]: With dead ends: 33 [2021-08-26 04:25:50,810 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 04:25:50,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 04:25:50,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 04:25:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-26 04:25:50,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-08-26 04:25:50,835 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 12 [2021-08-26 04:25:50,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:50,835 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-08-26 04:25:50,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:50,836 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2021-08-26 04:25:50,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 04:25:50,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:50,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:50,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 04:25:50,837 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:50,838 INFO L82 PathProgramCache]: Analyzing trace with hash -2059231113, now seen corresponding path program 1 times [2021-08-26 04:25:50,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:50,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264254116] [2021-08-26 04:25:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:50,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:50,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:50,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264254116] [2021-08-26 04:25:50,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264254116] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:25:50,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:25:50,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 04:25:50,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024716800] [2021-08-26 04:25:50,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 04:25:50,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:50,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 04:25:50,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 04:25:50,926 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:50,996 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2021-08-26 04:25:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 04:25:50,998 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-26 04:25:50,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:50,999 INFO L225 Difference]: With dead ends: 32 [2021-08-26 04:25:50,999 INFO L226 Difference]: Without dead ends: 20 [2021-08-26 04:25:51,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 04:25:51,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-26 04:25:51,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-08-26 04:25:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:51,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-08-26 04:25:51,005 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 12 [2021-08-26 04:25:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:51,005 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-08-26 04:25:51,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-08-26 04:25:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 04:25:51,006 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:51,007 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:51,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 04:25:51,007 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:51,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:51,008 INFO L82 PathProgramCache]: Analyzing trace with hash 573171571, now seen corresponding path program 1 times [2021-08-26 04:25:51,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:51,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365181413] [2021-08-26 04:25:51,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:51,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 04:25:51,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:51,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365181413] [2021-08-26 04:25:51,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365181413] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:25:51,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:25:51,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 04:25:51,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361961853] [2021-08-26 04:25:51,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 04:25:51,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:51,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 04:25:51,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:25:51,073 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:51,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:51,116 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2021-08-26 04:25:51,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 04:25:51,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 04:25:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:51,117 INFO L225 Difference]: With dead ends: 38 [2021-08-26 04:25:51,117 INFO L226 Difference]: Without dead ends: 25 [2021-08-26 04:25:51,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:25:51,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-26 04:25:51,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-08-26 04:25:51,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:51,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-08-26 04:25:51,121 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 15 [2021-08-26 04:25:51,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:51,122 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-08-26 04:25:51,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:51,122 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-08-26 04:25:51,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 04:25:51,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:51,123 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:51,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 04:25:51,123 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:51,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:51,124 INFO L82 PathProgramCache]: Analyzing trace with hash 630429873, now seen corresponding path program 1 times [2021-08-26 04:25:51,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:51,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647703567] [2021-08-26 04:25:51,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:51,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:51,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 04:25:51,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:51,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647703567] [2021-08-26 04:25:51,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647703567] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:25:51,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:25:51,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 04:25:51,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261013334] [2021-08-26 04:25:51,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 04:25:51,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 04:25:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 04:25:51,250 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:51,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:51,282 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2021-08-26 04:25:51,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 04:25:51,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 04:25:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:51,285 INFO L225 Difference]: With dead ends: 46 [2021-08-26 04:25:51,285 INFO L226 Difference]: Without dead ends: 32 [2021-08-26 04:25:51,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 04:25:51,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-26 04:25:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-08-26 04:25:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 42 transitions. [2021-08-26 04:25:51,291 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 42 transitions. Word has length 15 [2021-08-26 04:25:51,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:51,291 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 42 transitions. [2021-08-26 04:25:51,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:51,291 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 42 transitions. [2021-08-26 04:25:51,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 04:25:51,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:51,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:51,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 04:25:51,293 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:51,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:51,293 INFO L82 PathProgramCache]: Analyzing trace with hash 630489455, now seen corresponding path program 1 times [2021-08-26 04:25:51,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:51,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719849959] [2021-08-26 04:25:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:51,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:51,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:51,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719849959] [2021-08-26 04:25:51,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719849959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:51,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218847858] [2021-08-26 04:25:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:51,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:51,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:25:51,384 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:25:51,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 04:25:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:51,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 04:25:51,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:25:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:51,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218847858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:51,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:25:51,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-26 04:25:51,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480034017] [2021-08-26 04:25:51,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 04:25:51,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:51,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 04:25:51,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-08-26 04:25:51,674 INFO L87 Difference]: Start difference. First operand 30 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:51,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:51,805 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2021-08-26 04:25:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 04:25:51,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 04:25:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:51,807 INFO L225 Difference]: With dead ends: 67 [2021-08-26 04:25:51,807 INFO L226 Difference]: Without dead ends: 41 [2021-08-26 04:25:51,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-08-26 04:25:51,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-26 04:25:51,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-08-26 04:25:51,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2021-08-26 04:25:51,813 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 15 [2021-08-26 04:25:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:51,813 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2021-08-26 04:25:51,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2021-08-26 04:25:51,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 04:25:51,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:51,814 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:51,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 04:25:52,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:52,025 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:52,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:52,026 INFO L82 PathProgramCache]: Analyzing trace with hash 730990835, now seen corresponding path program 2 times [2021-08-26 04:25:52,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:52,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118668453] [2021-08-26 04:25:52,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:52,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:52,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:52,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:52,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:52,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118668453] [2021-08-26 04:25:52,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118668453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:52,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171285978] [2021-08-26 04:25:52,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:25:52,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:52,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:25:52,129 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:25:52,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 04:25:52,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:25:52,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:25:52,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 04:25:52,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:25:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 04:25:52,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171285978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:52,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:25:52,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-26 04:25:52,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271899875] [2021-08-26 04:25:52,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 04:25:52,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:52,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 04:25:52,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-26 04:25:52,479 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:52,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:52,750 INFO L93 Difference]: Finished difference Result 123 states and 179 transitions. [2021-08-26 04:25:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 04:25:52,751 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-26 04:25:52,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:52,752 INFO L225 Difference]: With dead ends: 123 [2021-08-26 04:25:52,752 INFO L226 Difference]: Without dead ends: 91 [2021-08-26 04:25:52,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-08-26 04:25:52,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-26 04:25:52,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-08-26 04:25:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 75 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:52,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 103 transitions. [2021-08-26 04:25:52,763 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 103 transitions. Word has length 18 [2021-08-26 04:25:52,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:52,763 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 103 transitions. [2021-08-26 04:25:52,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:52,764 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 103 transitions. [2021-08-26 04:25:52,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 04:25:52,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:52,765 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:52,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 04:25:52,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-26 04:25:52,983 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:52,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:52,983 INFO L82 PathProgramCache]: Analyzing trace with hash -104466575, now seen corresponding path program 1 times [2021-08-26 04:25:52,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:52,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618645519] [2021-08-26 04:25:52,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:52,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:53,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:53,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618645519] [2021-08-26 04:25:53,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618645519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:53,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606188950] [2021-08-26 04:25:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:53,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:53,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:25:53,064 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:25:53,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 04:25:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:53,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 04:25:53,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:25:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:53,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606188950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:53,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:25:53,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-08-26 04:25:53,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20698934] [2021-08-26 04:25:53,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 04:25:53,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:53,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 04:25:53,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-08-26 04:25:53,309 INFO L87 Difference]: Start difference. First operand 76 states and 103 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:53,386 INFO L93 Difference]: Finished difference Result 199 states and 271 transitions. [2021-08-26 04:25:53,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 04:25:53,387 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-26 04:25:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:53,391 INFO L225 Difference]: With dead ends: 199 [2021-08-26 04:25:53,391 INFO L226 Difference]: Without dead ends: 127 [2021-08-26 04:25:53,392 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-08-26 04:25:53,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-08-26 04:25:53,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2021-08-26 04:25:53,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.367816091954023) internal successors, (119), 87 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:53,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 119 transitions. [2021-08-26 04:25:53,414 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 119 transitions. Word has length 21 [2021-08-26 04:25:53,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:53,415 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 119 transitions. [2021-08-26 04:25:53,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:53,415 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 119 transitions. [2021-08-26 04:25:53,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 04:25:53,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:53,416 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:53,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 04:25:53,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:53,639 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:53,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:53,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1399176113, now seen corresponding path program 2 times [2021-08-26 04:25:53,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:53,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102102921] [2021-08-26 04:25:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:53,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:53,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:53,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102102921] [2021-08-26 04:25:53,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102102921] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:53,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918524923] [2021-08-26 04:25:53,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:25:53,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:53,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:25:53,735 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:25:53,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 04:25:53,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:25:53,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:25:53,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 04:25:53,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:25:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-26 04:25:54,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918524923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:54,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:25:54,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-08-26 04:25:54,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257857536] [2021-08-26 04:25:54,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 04:25:54,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:54,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 04:25:54,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-08-26 04:25:54,043 INFO L87 Difference]: Start difference. First operand 88 states and 119 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:54,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:54,275 INFO L93 Difference]: Finished difference Result 291 states and 407 transitions. [2021-08-26 04:25:54,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 04:25:54,275 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-26 04:25:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:54,277 INFO L225 Difference]: With dead ends: 291 [2021-08-26 04:25:54,277 INFO L226 Difference]: Without dead ends: 207 [2021-08-26 04:25:54,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-08-26 04:25:54,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-08-26 04:25:54,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 146. [2021-08-26 04:25:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3655172413793104) internal successors, (198), 145 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 198 transitions. [2021-08-26 04:25:54,290 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 198 transitions. Word has length 24 [2021-08-26 04:25:54,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:54,290 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 198 transitions. [2021-08-26 04:25:54,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 198 transitions. [2021-08-26 04:25:54,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 04:25:54,292 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:54,292 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:54,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 04:25:54,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:54,505 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:54,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:54,505 INFO L82 PathProgramCache]: Analyzing trace with hash -2084547665, now seen corresponding path program 3 times [2021-08-26 04:25:54,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:54,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192476310] [2021-08-26 04:25:54,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:54,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:54,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:54,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192476310] [2021-08-26 04:25:54,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192476310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:54,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213590644] [2021-08-26 04:25:54,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:25:54,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:54,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:25:54,594 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:25:54,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 04:25:54,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 04:25:54,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:25:54,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 04:25:54,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:25:54,785 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-26 04:25:54,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213590644] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:25:54,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 04:25:54,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2021-08-26 04:25:54,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825801462] [2021-08-26 04:25:54,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 04:25:54,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:54,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 04:25:54,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-26 04:25:54,787 INFO L87 Difference]: Start difference. First operand 146 states and 198 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:54,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:54,832 INFO L93 Difference]: Finished difference Result 334 states and 454 transitions. [2021-08-26 04:25:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 04:25:54,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-26 04:25:54,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:54,834 INFO L225 Difference]: With dead ends: 334 [2021-08-26 04:25:54,834 INFO L226 Difference]: Without dead ends: 192 [2021-08-26 04:25:54,835 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-08-26 04:25:54,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-26 04:25:54,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 164. [2021-08-26 04:25:54,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.2638036809815951) internal successors, (206), 163 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:54,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 206 transitions. [2021-08-26 04:25:54,846 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 206 transitions. Word has length 27 [2021-08-26 04:25:54,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:54,846 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 206 transitions. [2021-08-26 04:25:54,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 206 transitions. [2021-08-26 04:25:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 04:25:54,848 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:54,848 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:54,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 04:25:55,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:55,066 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:55,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:55,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1868779761, now seen corresponding path program 1 times [2021-08-26 04:25:55,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:55,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532849137] [2021-08-26 04:25:55,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:55,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-08-26 04:25:55,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:55,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532849137] [2021-08-26 04:25:55,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532849137] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:25:55,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:25:55,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 04:25:55,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091398143] [2021-08-26 04:25:55,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 04:25:55,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:55,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 04:25:55,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:25:55,095 INFO L87 Difference]: Start difference. First operand 164 states and 206 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:55,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:55,121 INFO L93 Difference]: Finished difference Result 344 states and 436 transitions. [2021-08-26 04:25:55,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 04:25:55,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-26 04:25:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:55,122 INFO L225 Difference]: With dead ends: 344 [2021-08-26 04:25:55,122 INFO L226 Difference]: Without dead ends: 184 [2021-08-26 04:25:55,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:25:55,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-08-26 04:25:55,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 162. [2021-08-26 04:25:55,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.2422360248447204) internal successors, (200), 161 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 200 transitions. [2021-08-26 04:25:55,135 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 200 transitions. Word has length 27 [2021-08-26 04:25:55,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:55,136 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 200 transitions. [2021-08-26 04:25:55,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:55,137 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 200 transitions. [2021-08-26 04:25:55,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 04:25:55,141 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:55,141 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:55,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-26 04:25:55,141 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:55,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:55,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1323368939, now seen corresponding path program 1 times [2021-08-26 04:25:55,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:55,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127663405] [2021-08-26 04:25:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:55,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:55,171 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-26 04:25:55,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:55,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127663405] [2021-08-26 04:25:55,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127663405] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:25:55,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:25:55,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 04:25:55,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768653861] [2021-08-26 04:25:55,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 04:25:55,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:55,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 04:25:55,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:25:55,174 INFO L87 Difference]: Start difference. First operand 162 states and 200 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:55,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:55,192 INFO L93 Difference]: Finished difference Result 256 states and 318 transitions. [2021-08-26 04:25:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 04:25:55,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-26 04:25:55,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:55,193 INFO L225 Difference]: With dead ends: 256 [2021-08-26 04:25:55,193 INFO L226 Difference]: Without dead ends: 176 [2021-08-26 04:25:55,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:25:55,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-08-26 04:25:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2021-08-26 04:25:55,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.2121212121212122) internal successors, (200), 165 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:55,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 200 transitions. [2021-08-26 04:25:55,202 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 200 transitions. Word has length 28 [2021-08-26 04:25:55,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:55,202 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 200 transitions. [2021-08-26 04:25:55,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 200 transitions. [2021-08-26 04:25:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 04:25:55,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:55,204 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:55,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-26 04:25:55,204 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:55,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:55,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1325275563, now seen corresponding path program 1 times [2021-08-26 04:25:55,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:55,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602763868] [2021-08-26 04:25:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:55,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:55,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:55,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602763868] [2021-08-26 04:25:55,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602763868] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:55,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423391762] [2021-08-26 04:25:55,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:55,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:55,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:25:55,293 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:25:55,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 04:25:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:55,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 04:25:55,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:25:55,626 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:55,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423391762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:55,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:25:55,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-08-26 04:25:55,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295044078] [2021-08-26 04:25:55,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 04:25:55,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:55,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 04:25:55,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-08-26 04:25:55,633 INFO L87 Difference]: Start difference. First operand 166 states and 200 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:55,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:55,709 INFO L93 Difference]: Finished difference Result 457 states and 547 transitions. [2021-08-26 04:25:55,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 04:25:55,710 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-26 04:25:55,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:55,711 INFO L225 Difference]: With dead ends: 457 [2021-08-26 04:25:55,711 INFO L226 Difference]: Without dead ends: 295 [2021-08-26 04:25:55,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-08-26 04:25:55,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-08-26 04:25:55,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 196. [2021-08-26 04:25:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.2) internal successors, (234), 195 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:55,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 234 transitions. [2021-08-26 04:25:55,722 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 234 transitions. Word has length 28 [2021-08-26 04:25:55,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:55,722 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 234 transitions. [2021-08-26 04:25:55,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:55,723 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 234 transitions. [2021-08-26 04:25:55,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 04:25:55,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:55,723 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:55,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-26 04:25:55,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:55,937 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:55,937 INFO L82 PathProgramCache]: Analyzing trace with hash 399501479, now seen corresponding path program 2 times [2021-08-26 04:25:55,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:55,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681318680] [2021-08-26 04:25:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:55,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:56,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:56,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681318680] [2021-08-26 04:25:56,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681318680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:56,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44376052] [2021-08-26 04:25:56,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:25:56,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:56,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:25:56,035 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:25:56,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-26 04:25:56,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:25:56,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:25:56,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 04:25:56,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:25:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:56,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44376052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:56,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:25:56,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-26 04:25:56,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893724066] [2021-08-26 04:25:56,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 04:25:56,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:56,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 04:25:56,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-08-26 04:25:56,413 INFO L87 Difference]: Start difference. First operand 196 states and 234 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:56,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:56,500 INFO L93 Difference]: Finished difference Result 517 states and 615 transitions. [2021-08-26 04:25:56,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 04:25:56,500 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-26 04:25:56,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:56,502 INFO L225 Difference]: With dead ends: 517 [2021-08-26 04:25:56,502 INFO L226 Difference]: Without dead ends: 325 [2021-08-26 04:25:56,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-08-26 04:25:56,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-08-26 04:25:56,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 226. [2021-08-26 04:25:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.191111111111111) internal successors, (268), 225 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:56,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 268 transitions. [2021-08-26 04:25:56,513 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 268 transitions. Word has length 31 [2021-08-26 04:25:56,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:56,514 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 268 transitions. [2021-08-26 04:25:56,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:56,514 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 268 transitions. [2021-08-26 04:25:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 04:25:56,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:56,515 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:56,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-26 04:25:56,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:56,739 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:56,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:56,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1351227349, now seen corresponding path program 3 times [2021-08-26 04:25:56,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:56,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486323388] [2021-08-26 04:25:56,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:56,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:56,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:56,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486323388] [2021-08-26 04:25:56,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486323388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:56,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205788481] [2021-08-26 04:25:56,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:25:56,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:56,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:25:56,835 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:25:56,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 04:25:56,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 04:25:56,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:25:56,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 04:25:56,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:25:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-08-26 04:25:57,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205788481] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:25:57,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 04:25:57,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2021-08-26 04:25:57,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81591874] [2021-08-26 04:25:57,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 04:25:57,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:57,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 04:25:57,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-26 04:25:57,126 INFO L87 Difference]: Start difference. First operand 226 states and 268 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:57,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:57,192 INFO L93 Difference]: Finished difference Result 229 states and 270 transitions. [2021-08-26 04:25:57,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 04:25:57,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-26 04:25:57,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:57,194 INFO L225 Difference]: With dead ends: 229 [2021-08-26 04:25:57,194 INFO L226 Difference]: Without dead ends: 169 [2021-08-26 04:25:57,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 119.2ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-26 04:25:57,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-26 04:25:57,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2021-08-26 04:25:57,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 167 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 201 transitions. [2021-08-26 04:25:57,203 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 201 transitions. Word has length 34 [2021-08-26 04:25:57,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:57,203 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 201 transitions. [2021-08-26 04:25:57,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:57,203 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 201 transitions. [2021-08-26 04:25:57,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 04:25:57,204 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:57,204 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:57,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 04:25:57,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-26 04:25:57,417 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:57,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1860700439, now seen corresponding path program 1 times [2021-08-26 04:25:57,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:57,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504129413] [2021-08-26 04:25:57,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:57,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:57,503 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:57,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:57,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504129413] [2021-08-26 04:25:57,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504129413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:57,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023515310] [2021-08-26 04:25:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:57,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:57,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:25:57,505 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:25:57,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-26 04:25:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:57,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 04:25:57,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:25:57,899 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:57,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023515310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:57,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:25:57,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-08-26 04:25:57,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049420941] [2021-08-26 04:25:57,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 04:25:57,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:57,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 04:25:57,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-08-26 04:25:57,902 INFO L87 Difference]: Start difference. First operand 168 states and 201 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:58,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:58,002 INFO L93 Difference]: Finished difference Result 451 states and 537 transitions. [2021-08-26 04:25:58,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 04:25:58,002 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-26 04:25:58,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:58,003 INFO L225 Difference]: With dead ends: 451 [2021-08-26 04:25:58,004 INFO L226 Difference]: Without dead ends: 287 [2021-08-26 04:25:58,004 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-08-26 04:25:58,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-08-26 04:25:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 192. [2021-08-26 04:25:58,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.198952879581152) internal successors, (229), 191 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 229 transitions. [2021-08-26 04:25:58,015 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 229 transitions. Word has length 34 [2021-08-26 04:25:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:58,015 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 229 transitions. [2021-08-26 04:25:58,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 229 transitions. [2021-08-26 04:25:58,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-26 04:25:58,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:58,016 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:58,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-26 04:25:58,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-26 04:25:58,229 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:58,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:58,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1470700201, now seen corresponding path program 2 times [2021-08-26 04:25:58,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:58,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497215969] [2021-08-26 04:25:58,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:58,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:58,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:58,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497215969] [2021-08-26 04:25:58,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497215969] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:58,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537831613] [2021-08-26 04:25:58,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:25:58,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:58,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:25:58,339 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:25:58,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-26 04:25:58,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:25:58,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:25:58,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 04:25:58,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:25:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:58,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537831613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:58,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:25:58,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-26 04:25:58,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881568284] [2021-08-26 04:25:58,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 04:25:58,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:58,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 04:25:58,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-08-26 04:25:58,884 INFO L87 Difference]: Start difference. First operand 192 states and 229 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:58,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:25:58,996 INFO L93 Difference]: Finished difference Result 499 states and 593 transitions. [2021-08-26 04:25:58,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 04:25:58,997 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-26 04:25:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:25:58,998 INFO L225 Difference]: With dead ends: 499 [2021-08-26 04:25:58,999 INFO L226 Difference]: Without dead ends: 311 [2021-08-26 04:25:58,999 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-08-26 04:25:59,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-08-26 04:25:59,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 216. [2021-08-26 04:25:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.1953488372093024) internal successors, (257), 215 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 257 transitions. [2021-08-26 04:25:59,010 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 257 transitions. Word has length 37 [2021-08-26 04:25:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:25:59,010 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 257 transitions. [2021-08-26 04:25:59,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:25:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 257 transitions. [2021-08-26 04:25:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-26 04:25:59,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:25:59,011 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:25:59,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-26 04:25:59,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-26 04:25:59,225 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:25:59,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:25:59,225 INFO L82 PathProgramCache]: Analyzing trace with hash -877109527, now seen corresponding path program 3 times [2021-08-26 04:25:59,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:25:59,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912099380] [2021-08-26 04:25:59,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:25:59,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:25:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:25:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:25:59,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:25:59,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912099380] [2021-08-26 04:25:59,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912099380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:25:59,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624217391] [2021-08-26 04:25:59,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:25:59,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:25:59,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:25:59,341 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:25:59,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-26 04:25:59,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 04:25:59,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:25:59,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 04:25:59,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:25:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-08-26 04:25:59,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624217391] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:25:59,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 04:25:59,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2021-08-26 04:25:59,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354441585] [2021-08-26 04:25:59,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 04:25:59,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:25:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 04:25:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-08-26 04:25:59,952 INFO L87 Difference]: Start difference. First operand 216 states and 257 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:00,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:00,049 INFO L93 Difference]: Finished difference Result 496 states and 586 transitions. [2021-08-26 04:26:00,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 04:26:00,050 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-26 04:26:00,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:00,052 INFO L225 Difference]: With dead ends: 496 [2021-08-26 04:26:00,052 INFO L226 Difference]: Without dead ends: 494 [2021-08-26 04:26:00,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-08-26 04:26:00,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-08-26 04:26:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 306. [2021-08-26 04:26:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1836065573770491) internal successors, (361), 305 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 361 transitions. [2021-08-26 04:26:00,070 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 361 transitions. Word has length 40 [2021-08-26 04:26:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:00,071 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 361 transitions. [2021-08-26 04:26:00,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 361 transitions. [2021-08-26 04:26:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-26 04:26:00,071 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:00,072 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:00,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:00,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-26 04:26:00,300 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:00,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1950517015, now seen corresponding path program 1 times [2021-08-26 04:26:00,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:00,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202495730] [2021-08-26 04:26:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:00,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:00,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:00,418 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:26:00,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:00,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202495730] [2021-08-26 04:26:00,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202495730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:00,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624838341] [2021-08-26 04:26:00,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:00,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:00,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:00,420 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:00,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-26 04:26:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:00,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 04:26:00,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:26:00,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624838341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:00,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:00,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-08-26 04:26:00,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263792072] [2021-08-26 04:26:00,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-26 04:26:00,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:00,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-26 04:26:00,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-08-26 04:26:00,985 INFO L87 Difference]: Start difference. First operand 306 states and 361 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:01,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:01,121 INFO L93 Difference]: Finished difference Result 669 states and 793 transitions. [2021-08-26 04:26:01,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 04:26:01,122 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-26 04:26:01,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:01,124 INFO L225 Difference]: With dead ends: 669 [2021-08-26 04:26:01,124 INFO L226 Difference]: Without dead ends: 439 [2021-08-26 04:26:01,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-08-26 04:26:01,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-08-26 04:26:01,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 339. [2021-08-26 04:26:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.180473372781065) internal successors, (399), 338 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:01,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 399 transitions. [2021-08-26 04:26:01,142 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 399 transitions. Word has length 40 [2021-08-26 04:26:01,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:01,142 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 399 transitions. [2021-08-26 04:26:01,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:01,142 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 399 transitions. [2021-08-26 04:26:01,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-26 04:26:01,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:01,143 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:01,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:01,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-26 04:26:01,362 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:01,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:01,362 INFO L82 PathProgramCache]: Analyzing trace with hash -658324379, now seen corresponding path program 2 times [2021-08-26 04:26:01,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:01,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610273591] [2021-08-26 04:26:01,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:01,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:26:01,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:01,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610273591] [2021-08-26 04:26:01,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610273591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:01,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904066633] [2021-08-26 04:26:01,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:26:01,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:01,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:01,535 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:01,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-26 04:26:01,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:26:01,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:26:01,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 04:26:01,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-08-26 04:26:02,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904066633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:02,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:02,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-08-26 04:26:02,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98535927] [2021-08-26 04:26:02,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 04:26:02,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:02,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 04:26:02,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2021-08-26 04:26:02,077 INFO L87 Difference]: Start difference. First operand 339 states and 399 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:02,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:02,508 INFO L93 Difference]: Finished difference Result 1075 states and 1251 transitions. [2021-08-26 04:26:02,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-26 04:26:02,509 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-26 04:26:02,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:02,511 INFO L225 Difference]: With dead ends: 1075 [2021-08-26 04:26:02,512 INFO L226 Difference]: Without dead ends: 821 [2021-08-26 04:26:02,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 359.4ms TimeCoverageRelationStatistics Valid=486, Invalid=996, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 04:26:02,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-08-26 04:26:02,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 333. [2021-08-26 04:26:02,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.1686746987951808) internal successors, (388), 332 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:02,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-08-26 04:26:02,540 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 43 [2021-08-26 04:26:02,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:02,541 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-08-26 04:26:02,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:02,541 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-08-26 04:26:02,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 04:26:02,542 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:02,542 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:02,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:02,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:02,757 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:02,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:02,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1311604647, now seen corresponding path program 3 times [2021-08-26 04:26:02,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:02,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585621000] [2021-08-26 04:26:02,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:02,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:26:02,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:02,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585621000] [2021-08-26 04:26:02,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585621000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:02,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495732209] [2021-08-26 04:26:02,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:26:02,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:02,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:02,906 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:02,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-26 04:26:03,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 04:26:03,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:26:03,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 04:26:03,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:03,641 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-08-26 04:26:03,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495732209] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:26:03,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 04:26:03,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 21 [2021-08-26 04:26:03,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521152216] [2021-08-26 04:26:03,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 04:26:03,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:03,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 04:26:03,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-08-26 04:26:03,643 INFO L87 Difference]: Start difference. First operand 333 states and 388 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:03,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:03,785 INFO L93 Difference]: Finished difference Result 442 states and 513 transitions. [2021-08-26 04:26:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 04:26:03,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-26 04:26:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:03,788 INFO L225 Difference]: With dead ends: 442 [2021-08-26 04:26:03,788 INFO L226 Difference]: Without dead ends: 440 [2021-08-26 04:26:03,788 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-08-26 04:26:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-08-26 04:26:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 333. [2021-08-26 04:26:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.1686746987951808) internal successors, (388), 332 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-08-26 04:26:03,807 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 46 [2021-08-26 04:26:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:03,808 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-08-26 04:26:03,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-08-26 04:26:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 04:26:03,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:03,808 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:03,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:04,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:04,033 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:04,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:04,033 INFO L82 PathProgramCache]: Analyzing trace with hash -53609623, now seen corresponding path program 1 times [2021-08-26 04:26:04,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:04,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773734633] [2021-08-26 04:26:04,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:04,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-08-26 04:26:04,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:04,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773734633] [2021-08-26 04:26:04,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773734633] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:26:04,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:26:04,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 04:26:04,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925187819] [2021-08-26 04:26:04,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 04:26:04,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:04,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 04:26:04,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 04:26:04,081 INFO L87 Difference]: Start difference. First operand 333 states and 388 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:04,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:04,128 INFO L93 Difference]: Finished difference Result 561 states and 655 transitions. [2021-08-26 04:26:04,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 04:26:04,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-26 04:26:04,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:04,130 INFO L225 Difference]: With dead ends: 561 [2021-08-26 04:26:04,130 INFO L226 Difference]: Without dead ends: 448 [2021-08-26 04:26:04,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-26 04:26:04,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-08-26 04:26:04,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 400. [2021-08-26 04:26:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.1754385964912282) internal successors, (469), 399 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 469 transitions. [2021-08-26 04:26:04,161 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 469 transitions. Word has length 46 [2021-08-26 04:26:04,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:04,162 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 469 transitions. [2021-08-26 04:26:04,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:04,162 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 469 transitions. [2021-08-26 04:26:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-26 04:26:04,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:04,163 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:04,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-26 04:26:04,163 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:04,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:04,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1284068705, now seen corresponding path program 1 times [2021-08-26 04:26:04,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:04,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591473944] [2021-08-26 04:26:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:04,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-08-26 04:26:04,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:04,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591473944] [2021-08-26 04:26:04,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591473944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:04,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934167210] [2021-08-26 04:26:04,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:04,320 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:04,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:04,325 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:04,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-26 04:26:04,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:04,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 04:26:04,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:05,191 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-08-26 04:26:05,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934167210] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:05,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:05,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-08-26 04:26:05,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842533984] [2021-08-26 04:26:05,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-26 04:26:05,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:05,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-26 04:26:05,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-08-26 04:26:05,193 INFO L87 Difference]: Start difference. First operand 400 states and 469 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:05,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:05,388 INFO L93 Difference]: Finished difference Result 1102 states and 1266 transitions. [2021-08-26 04:26:05,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 04:26:05,390 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-08-26 04:26:05,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:05,393 INFO L225 Difference]: With dead ends: 1102 [2021-08-26 04:26:05,393 INFO L226 Difference]: Without dead ends: 793 [2021-08-26 04:26:05,394 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-08-26 04:26:05,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-08-26 04:26:05,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 439. [2021-08-26 04:26:05,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.17351598173516) internal successors, (514), 438 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:05,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 514 transitions. [2021-08-26 04:26:05,424 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 514 transitions. Word has length 87 [2021-08-26 04:26:05,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:05,424 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 514 transitions. [2021-08-26 04:26:05,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:05,424 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 514 transitions. [2021-08-26 04:26:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-08-26 04:26:05,425 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:05,425 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:05,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:05,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:05,649 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:05,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:05,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1856213775, now seen corresponding path program 2 times [2021-08-26 04:26:05,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:05,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926041967] [2021-08-26 04:26:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:05,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:05,800 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-08-26 04:26:05,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:05,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926041967] [2021-08-26 04:26:05,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926041967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:05,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725653317] [2021-08-26 04:26:05,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:26:05,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:05,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:05,802 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:05,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-26 04:26:06,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:26:06,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:26:06,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 04:26:06,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:06,689 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-08-26 04:26:06,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725653317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:06,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:06,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-08-26 04:26:06,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424947557] [2021-08-26 04:26:06,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-26 04:26:06,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:06,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-26 04:26:06,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-08-26 04:26:06,695 INFO L87 Difference]: Start difference. First operand 439 states and 514 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:06,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:06,886 INFO L93 Difference]: Finished difference Result 1171 states and 1346 transitions. [2021-08-26 04:26:06,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 04:26:06,887 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-08-26 04:26:06,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:06,890 INFO L225 Difference]: With dead ends: 1171 [2021-08-26 04:26:06,890 INFO L226 Difference]: Without dead ends: 832 [2021-08-26 04:26:06,891 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-08-26 04:26:06,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-08-26 04:26:06,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 478. [2021-08-26 04:26:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.1719077568134173) internal successors, (559), 477 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:06,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 559 transitions. [2021-08-26 04:26:06,925 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 559 transitions. Word has length 93 [2021-08-26 04:26:06,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:06,925 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 559 transitions. [2021-08-26 04:26:06,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:06,926 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 559 transitions. [2021-08-26 04:26:06,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-08-26 04:26:06,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:06,927 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:06,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:07,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-26 04:26:07,150 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:07,150 INFO L82 PathProgramCache]: Analyzing trace with hash -267019423, now seen corresponding path program 3 times [2021-08-26 04:26:07,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:07,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273895846] [2021-08-26 04:26:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:07,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:07,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 535 proven. 247 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-08-26 04:26:07,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:07,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273895846] [2021-08-26 04:26:07,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273895846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:07,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602471479] [2021-08-26 04:26:07,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:26:07,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:07,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:07,336 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:07,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-26 04:26:07,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 04:26:07,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:26:07,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 04:26:07,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:08,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 37 proven. 541 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-08-26 04:26:08,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602471479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:08,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:08,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 24 [2021-08-26 04:26:08,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124479870] [2021-08-26 04:26:08,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-26 04:26:08,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:08,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-26 04:26:08,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-26 04:26:08,465 INFO L87 Difference]: Start difference. First operand 478 states and 559 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:10,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:10,057 INFO L93 Difference]: Finished difference Result 2208 states and 2540 transitions. [2021-08-26 04:26:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-26 04:26:10,058 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-08-26 04:26:10,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:10,062 INFO L225 Difference]: With dead ends: 2208 [2021-08-26 04:26:10,062 INFO L226 Difference]: Without dead ends: 1839 [2021-08-26 04:26:10,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 1262.1ms TimeCoverageRelationStatistics Valid=1574, Invalid=5908, Unknown=0, NotChecked=0, Total=7482 [2021-08-26 04:26:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-08-26 04:26:10,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 770. [2021-08-26 04:26:10,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 1.1716514954486346) internal successors, (901), 769 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:10,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 901 transitions. [2021-08-26 04:26:10,129 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 901 transitions. Word has length 99 [2021-08-26 04:26:10,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:10,129 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 901 transitions. [2021-08-26 04:26:10,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:10,130 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 901 transitions. [2021-08-26 04:26:10,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-26 04:26:10,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:10,131 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 24, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:10,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:10,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:10,345 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash -111346257, now seen corresponding path program 1 times [2021-08-26 04:26:10,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:10,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099308808] [2021-08-26 04:26:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:10,346 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:10,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 49 proven. 861 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-08-26 04:26:10,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:10,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099308808] [2021-08-26 04:26:10,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099308808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:10,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729131456] [2021-08-26 04:26:10,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:10,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:10,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:10,536 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:10,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-26 04:26:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:11,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 04:26:11,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 618 proven. 287 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-08-26 04:26:11,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729131456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:11,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:11,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-08-26 04:26:11,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942256976] [2021-08-26 04:26:11,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-26 04:26:11,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:11,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-26 04:26:11,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 04:26:11,644 INFO L87 Difference]: Start difference. First operand 770 states and 901 transitions. Second operand has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:11,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:11,906 INFO L93 Difference]: Finished difference Result 1968 states and 2264 transitions. [2021-08-26 04:26:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 04:26:11,906 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-08-26 04:26:11,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:11,909 INFO L225 Difference]: With dead ends: 1968 [2021-08-26 04:26:11,909 INFO L226 Difference]: Without dead ends: 1316 [2021-08-26 04:26:11,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 04:26:11,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-08-26 04:26:11,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 809. [2021-08-26 04:26:11,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 1.1707920792079207) internal successors, (946), 808 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:11,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 946 transitions. [2021-08-26 04:26:11,981 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 946 transitions. Word has length 105 [2021-08-26 04:26:11,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:11,981 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 946 transitions. [2021-08-26 04:26:11,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:11,982 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 946 transitions. [2021-08-26 04:26:11,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-08-26 04:26:11,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:11,983 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 26, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:12,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:12,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:12,207 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:12,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:12,207 INFO L82 PathProgramCache]: Analyzing trace with hash 802849635, now seen corresponding path program 2 times [2021-08-26 04:26:12,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:12,208 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478143369] [2021-08-26 04:26:12,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:12,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:12,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 52 proven. 990 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-08-26 04:26:12,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:12,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478143369] [2021-08-26 04:26:12,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478143369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:12,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134510558] [2021-08-26 04:26:12,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:26:12,423 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:12,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:12,424 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:12,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-26 04:26:13,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:26:13,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:26:13,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 04:26:13,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-08-26 04:26:13,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134510558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:13,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:13,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-08-26 04:26:13,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466214139] [2021-08-26 04:26:13,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-26 04:26:13,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:13,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-26 04:26:13,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 04:26:13,672 INFO L87 Difference]: Start difference. First operand 809 states and 946 transitions. Second operand has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:13,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:13,975 INFO L93 Difference]: Finished difference Result 2078 states and 2393 transitions. [2021-08-26 04:26:13,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-26 04:26:13,976 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-08-26 04:26:13,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:13,979 INFO L225 Difference]: With dead ends: 2078 [2021-08-26 04:26:13,979 INFO L226 Difference]: Without dead ends: 1396 [2021-08-26 04:26:13,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 329.3ms TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 04:26:13,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-08-26 04:26:14,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 866. [2021-08-26 04:26:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.169942196531792) internal successors, (1012), 865 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1012 transitions. [2021-08-26 04:26:14,063 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1012 transitions. Word has length 111 [2021-08-26 04:26:14,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:14,063 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1012 transitions. [2021-08-26 04:26:14,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:14,064 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1012 transitions. [2021-08-26 04:26:14,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-08-26 04:26:14,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:14,065 INFO L512 BasicCegarLoop]: trace histogram [32, 32, 28, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:14,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-08-26 04:26:14,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:14,281 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:14,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:14,281 INFO L82 PathProgramCache]: Analyzing trace with hash -780287697, now seen corresponding path program 3 times [2021-08-26 04:26:14,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:14,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799957744] [2021-08-26 04:26:14,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:14,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 55 proven. 1128 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-08-26 04:26:14,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:14,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799957744] [2021-08-26 04:26:14,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799957744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:14,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039184923] [2021-08-26 04:26:14,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:26:14,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:14,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:14,537 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:14,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-26 04:26:15,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 04:26:15,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:26:15,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 04:26:15,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 807 proven. 47 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2021-08-26 04:26:15,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039184923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:15,561 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:15,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 25 [2021-08-26 04:26:15,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915282575] [2021-08-26 04:26:15,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-26 04:26:15,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:15,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-26 04:26:15,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-08-26 04:26:15,563 INFO L87 Difference]: Start difference. First operand 866 states and 1012 transitions. Second operand has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:16,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:16,982 INFO L93 Difference]: Finished difference Result 2428 states and 2841 transitions. [2021-08-26 04:26:16,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-26 04:26:16,982 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-08-26 04:26:16,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:16,987 INFO L225 Difference]: With dead ends: 2428 [2021-08-26 04:26:16,987 INFO L226 Difference]: Without dead ends: 1698 [2021-08-26 04:26:16,990 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 1211.8ms TimeCoverageRelationStatistics Valid=1816, Invalid=4990, Unknown=0, NotChecked=0, Total=6806 [2021-08-26 04:26:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-08-26 04:26:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1132. [2021-08-26 04:26:17,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1131 states have (on average 1.1520778072502211) internal successors, (1303), 1131 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:17,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1303 transitions. [2021-08-26 04:26:17,118 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1303 transitions. Word has length 117 [2021-08-26 04:26:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:17,118 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1303 transitions. [2021-08-26 04:26:17,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1303 transitions. [2021-08-26 04:26:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-08-26 04:26:17,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:17,120 INFO L512 BasicCegarLoop]: trace histogram [34, 34, 20, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:17,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:17,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-26 04:26:17,341 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:17,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:17,341 INFO L82 PathProgramCache]: Analyzing trace with hash 840591843, now seen corresponding path program 4 times [2021-08-26 04:26:17,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:17,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50720320] [2021-08-26 04:26:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:17,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 984 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-08-26 04:26:17,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:17,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50720320] [2021-08-26 04:26:17,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50720320] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:26:17,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:26:17,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 04:26:17,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373872568] [2021-08-26 04:26:17,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 04:26:17,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:17,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 04:26:17,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 04:26:17,392 INFO L87 Difference]: Start difference. First operand 1132 states and 1303 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:17,534 INFO L93 Difference]: Finished difference Result 1815 states and 2023 transitions. [2021-08-26 04:26:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 04:26:17,534 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-08-26 04:26:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:17,537 INFO L225 Difference]: With dead ends: 1815 [2021-08-26 04:26:17,537 INFO L226 Difference]: Without dead ends: 1604 [2021-08-26 04:26:17,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 04:26:17,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-08-26 04:26:17,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1150. [2021-08-26 04:26:17,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.154917319408181) internal successors, (1327), 1149 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:17,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1327 transitions. [2021-08-26 04:26:17,622 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1327 transitions. Word has length 123 [2021-08-26 04:26:17,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:17,622 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1327 transitions. [2021-08-26 04:26:17,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:17,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1327 transitions. [2021-08-26 04:26:17,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-08-26 04:26:17,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:17,624 INFO L512 BasicCegarLoop]: trace histogram [34, 34, 19, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:17,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-08-26 04:26:17,624 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:17,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:17,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1273355935, now seen corresponding path program 5 times [2021-08-26 04:26:17,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:17,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721062035] [2021-08-26 04:26:17,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:17,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 903 proven. 425 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-08-26 04:26:17,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:17,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721062035] [2021-08-26 04:26:17,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721062035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:17,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622654323] [2021-08-26 04:26:17,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:26:17,873 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:17,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:17,877 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:17,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-26 04:26:18,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-08-26 04:26:18,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:26:18,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 04:26:18,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 1159 proven. 338 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-08-26 04:26:19,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622654323] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:19,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:19,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 42 [2021-08-26 04:26:19,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824007578] [2021-08-26 04:26:19,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-26 04:26:19,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:19,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-26 04:26:19,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1341, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 04:26:19,436 INFO L87 Difference]: Start difference. First operand 1150 states and 1327 transitions. Second operand has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:20,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:20,760 INFO L93 Difference]: Finished difference Result 2896 states and 3293 transitions. [2021-08-26 04:26:20,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-26 04:26:20,760 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-08-26 04:26:20,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:20,764 INFO L225 Difference]: With dead ends: 2896 [2021-08-26 04:26:20,764 INFO L226 Difference]: Without dead ends: 1893 [2021-08-26 04:26:20,768 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2477 ImplicationChecksByTransitivity, 1423.5ms TimeCoverageRelationStatistics Valid=2087, Invalid=7033, Unknown=0, NotChecked=0, Total=9120 [2021-08-26 04:26:20,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2021-08-26 04:26:20,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 1123. [2021-08-26 04:26:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 1122 states have (on average 1.1452762923351159) internal successors, (1285), 1122 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:20,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1285 transitions. [2021-08-26 04:26:20,873 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1285 transitions. Word has length 123 [2021-08-26 04:26:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:20,874 INFO L470 AbstractCegarLoop]: Abstraction has 1123 states and 1285 transitions. [2021-08-26 04:26:20,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.4761904761904763) internal successors, (146), 42 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1285 transitions. [2021-08-26 04:26:20,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-08-26 04:26:20,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:20,875 INFO L512 BasicCegarLoop]: trace histogram [36, 36, 21, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:20,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:21,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-26 04:26:21,081 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:21,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1151168365, now seen corresponding path program 6 times [2021-08-26 04:26:21,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:21,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49364662] [2021-08-26 04:26:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:21,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 1010 proven. 477 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-08-26 04:26:21,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:21,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49364662] [2021-08-26 04:26:21,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49364662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:21,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458010738] [2021-08-26 04:26:21,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:26:21,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:21,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:21,338 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:21,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-26 04:26:22,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-26 04:26:22,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:26:22,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 04:26:22,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 228 proven. 1027 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2021-08-26 04:26:23,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458010738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:23,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:23,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 29 [2021-08-26 04:26:23,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634922035] [2021-08-26 04:26:23,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-26 04:26:23,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-26 04:26:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=582, Unknown=0, NotChecked=0, Total=812 [2021-08-26 04:26:23,317 INFO L87 Difference]: Start difference. First operand 1123 states and 1285 transitions. Second operand has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:25,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:25,990 INFO L93 Difference]: Finished difference Result 2474 states and 2859 transitions. [2021-08-26 04:26:25,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-08-26 04:26:25,991 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-08-26 04:26:25,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:25,995 INFO L225 Difference]: With dead ends: 2474 [2021-08-26 04:26:25,995 INFO L226 Difference]: Without dead ends: 1496 [2021-08-26 04:26:26,000 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5530 ImplicationChecksByTransitivity, 2430.1ms TimeCoverageRelationStatistics Valid=3495, Invalid=13535, Unknown=0, NotChecked=0, Total=17030 [2021-08-26 04:26:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2021-08-26 04:26:26,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1254. [2021-08-26 04:26:26,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 1.1524341580207502) internal successors, (1444), 1253 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:26,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1444 transitions. [2021-08-26 04:26:26,087 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1444 transitions. Word has length 129 [2021-08-26 04:26:26,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:26,087 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 1444 transitions. [2021-08-26 04:26:26,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.7241379310344827) internal successors, (108), 29 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:26,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1444 transitions. [2021-08-26 04:26:26,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-08-26 04:26:26,089 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:26,089 INFO L512 BasicCegarLoop]: trace histogram [39, 39, 37, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:26,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-26 04:26:26,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:26,293 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:26,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:26,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2144366173, now seen corresponding path program 1 times [2021-08-26 04:26:26,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:26,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388265273] [2021-08-26 04:26:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:26,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 1182 proven. 590 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-08-26 04:26:26,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:26,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388265273] [2021-08-26 04:26:26,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388265273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:26,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276170087] [2021-08-26 04:26:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:26,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:26,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:26,602 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:26,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-26 04:26:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:27,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 04:26:27,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2309 backedges. 1181 proven. 590 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2021-08-26 04:26:28,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276170087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:28,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:28,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-08-26 04:26:28,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011557104] [2021-08-26 04:26:28,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-26 04:26:28,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:28,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-26 04:26:28,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2021-08-26 04:26:28,341 INFO L87 Difference]: Start difference. First operand 1254 states and 1444 transitions. Second operand has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:29,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:29,100 INFO L93 Difference]: Finished difference Result 2876 states and 3425 transitions. [2021-08-26 04:26:29,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-26 04:26:29,100 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-08-26 04:26:29,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:29,105 INFO L225 Difference]: With dead ends: 2876 [2021-08-26 04:26:29,105 INFO L226 Difference]: Without dead ends: 1781 [2021-08-26 04:26:29,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1529 ImplicationChecksByTransitivity, 982.0ms TimeCoverageRelationStatistics Valid=1654, Invalid=3748, Unknown=0, NotChecked=0, Total=5402 [2021-08-26 04:26:29,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-08-26 04:26:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1496. [2021-08-26 04:26:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 1.1812709030100335) internal successors, (1766), 1495 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 1766 transitions. [2021-08-26 04:26:29,184 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 1766 transitions. Word has length 138 [2021-08-26 04:26:29,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:29,184 INFO L470 AbstractCegarLoop]: Abstraction has 1496 states and 1766 transitions. [2021-08-26 04:26:29,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.108695652173913) internal successors, (143), 45 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:29,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 1766 transitions. [2021-08-26 04:26:29,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-08-26 04:26:29,186 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:29,186 INFO L512 BasicCegarLoop]: trace histogram [42, 42, 40, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:29,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:29,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:29,401 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:29,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:29,401 INFO L82 PathProgramCache]: Analyzing trace with hash 297433953, now seen corresponding path program 2 times [2021-08-26 04:26:29,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:29,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366362949] [2021-08-26 04:26:29,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:29,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 1368 proven. 651 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2021-08-26 04:26:29,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:29,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366362949] [2021-08-26 04:26:29,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366362949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:29,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567190763] [2021-08-26 04:26:29,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:26:29,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:29,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:29,718 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:29,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-26 04:26:30,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:26:30,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:26:30,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 04:26:30,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 6 proven. 1975 refuted. 0 times theorem prover too weak. 694 trivial. 0 not checked. [2021-08-26 04:26:31,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567190763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:31,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:31,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-08-26 04:26:31,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672046278] [2021-08-26 04:26:31,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-26 04:26:31,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:31,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-26 04:26:31,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=1561, Unknown=0, NotChecked=0, Total=2352 [2021-08-26 04:26:31,739 INFO L87 Difference]: Start difference. First operand 1496 states and 1766 transitions. Second operand has 49 states, 49 states have (on average 3.2857142857142856) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:32,344 INFO L93 Difference]: Finished difference Result 2748 states and 3281 transitions. [2021-08-26 04:26:32,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-26 04:26:32,344 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.2857142857142856) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-08-26 04:26:32,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:32,350 INFO L225 Difference]: With dead ends: 2748 [2021-08-26 04:26:32,351 INFO L226 Difference]: Without dead ends: 1869 [2021-08-26 04:26:32,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 843.4ms TimeCoverageRelationStatistics Valid=1575, Invalid=3395, Unknown=0, NotChecked=0, Total=4970 [2021-08-26 04:26:32,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-08-26 04:26:32,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1506. [2021-08-26 04:26:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.1847176079734218) internal successors, (1783), 1505 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:32,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 1783 transitions. [2021-08-26 04:26:32,460 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 1783 transitions. Word has length 147 [2021-08-26 04:26:32,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:32,460 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 1783 transitions. [2021-08-26 04:26:32,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.2857142857142856) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:32,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 1783 transitions. [2021-08-26 04:26:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-08-26 04:26:32,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:32,462 INFO L512 BasicCegarLoop]: trace histogram [42, 42, 42, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:32,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:32,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:32,686 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:32,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:32,686 INFO L82 PathProgramCache]: Analyzing trace with hash -758927133, now seen corresponding path program 1 times [2021-08-26 04:26:32,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:32,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737753705] [2021-08-26 04:26:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:32,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:32,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 2 proven. 1371 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2021-08-26 04:26:32,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:32,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737753705] [2021-08-26 04:26:32,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737753705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:32,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737357751] [2021-08-26 04:26:32,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:32,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:32,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:32,752 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:32,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-26 04:26:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:33,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 04:26:33,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2675 backedges. 1367 proven. 651 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2021-08-26 04:26:34,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737357751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:34,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:34,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 24] total 27 [2021-08-26 04:26:34,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766679119] [2021-08-26 04:26:34,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-26 04:26:34,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:34,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-26 04:26:34,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=446, Unknown=0, NotChecked=0, Total=756 [2021-08-26 04:26:34,683 INFO L87 Difference]: Start difference. First operand 1506 states and 1783 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:36,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:36,381 INFO L93 Difference]: Finished difference Result 3583 states and 4220 transitions. [2021-08-26 04:26:36,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-08-26 04:26:36,381 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-08-26 04:26:36,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:36,386 INFO L225 Difference]: With dead ends: 3583 [2021-08-26 04:26:36,386 INFO L226 Difference]: Without dead ends: 2342 [2021-08-26 04:26:36,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 1626.2ms TimeCoverageRelationStatistics Valid=2973, Invalid=6147, Unknown=0, NotChecked=0, Total=9120 [2021-08-26 04:26:36,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-08-26 04:26:36,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1721. [2021-08-26 04:26:36,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 1.1808139534883721) internal successors, (2031), 1720 states have internal predecessors, (2031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 2031 transitions. [2021-08-26 04:26:36,474 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 2031 transitions. Word has length 147 [2021-08-26 04:26:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:36,474 INFO L470 AbstractCegarLoop]: Abstraction has 1721 states and 2031 transitions. [2021-08-26 04:26:36,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 2031 transitions. [2021-08-26 04:26:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-08-26 04:26:36,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:36,476 INFO L512 BasicCegarLoop]: trace histogram [44, 44, 42, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:36,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-26 04:26:36,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-26 04:26:36,691 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:36,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:36,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1034830995, now seen corresponding path program 3 times [2021-08-26 04:26:36,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:36,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56240846] [2021-08-26 04:26:36,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:36,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:36,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 1499 proven. 715 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2021-08-26 04:26:37,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:37,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56240846] [2021-08-26 04:26:37,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56240846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:37,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189684985] [2021-08-26 04:26:37,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:26:37,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:37,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:37,045 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:37,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-26 04:26:38,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 04:26:38,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:26:38,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 04:26:38,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:39,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2934 backedges. 0 proven. 1504 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2021-08-26 04:26:39,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189684985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:39,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:39,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 34 [2021-08-26 04:26:39,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125945768] [2021-08-26 04:26:39,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-26 04:26:39,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:39,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-26 04:26:39,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=823, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 04:26:39,361 INFO L87 Difference]: Start difference. First operand 1721 states and 2031 transitions. Second operand has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 34 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:44,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:44,113 INFO L93 Difference]: Finished difference Result 3442 states and 4091 transitions. [2021-08-26 04:26:44,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-08-26 04:26:44,114 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 34 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 153 [2021-08-26 04:26:44,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:44,118 INFO L225 Difference]: With dead ends: 3442 [2021-08-26 04:26:44,118 INFO L226 Difference]: Without dead ends: 2356 [2021-08-26 04:26:44,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11383 ImplicationChecksByTransitivity, 4493.2ms TimeCoverageRelationStatistics Valid=5990, Invalid=26952, Unknown=0, NotChecked=0, Total=32942 [2021-08-26 04:26:44,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-08-26 04:26:44,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 1810. [2021-08-26 04:26:44,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1810 states, 1809 states have (on average 1.1774461028192371) internal successors, (2130), 1809 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:44,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1810 states to 1810 states and 2130 transitions. [2021-08-26 04:26:44,225 INFO L78 Accepts]: Start accepts. Automaton has 1810 states and 2130 transitions. Word has length 153 [2021-08-26 04:26:44,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:44,225 INFO L470 AbstractCegarLoop]: Abstraction has 1810 states and 2130 transitions. [2021-08-26 04:26:44,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.3823529411764706) internal successors, (115), 34 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:44,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1810 states and 2130 transitions. [2021-08-26 04:26:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-08-26 04:26:44,227 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:44,227 INFO L512 BasicCegarLoop]: trace histogram [45, 45, 44, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:44,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-26 04:26:44,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-26 04:26:44,427 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:44,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:44,428 INFO L82 PathProgramCache]: Analyzing trace with hash 882596709, now seen corresponding path program 1 times [2021-08-26 04:26:44,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:44,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858636666] [2021-08-26 04:26:44,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:44,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 1565 proven. 715 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-08-26 04:26:44,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:44,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858636666] [2021-08-26 04:26:44,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858636666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:44,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550854186] [2021-08-26 04:26:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:44,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:44,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:44,800 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:44,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-26 04:26:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:46,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 04:26:46,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:46,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3068 backedges. 1565 proven. 715 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-08-26 04:26:46,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550854186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:46,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:46,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-08-26 04:26:46,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741342736] [2021-08-26 04:26:46,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-26 04:26:46,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:46,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-26 04:26:46,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=1429, Unknown=0, NotChecked=0, Total=2352 [2021-08-26 04:26:46,887 INFO L87 Difference]: Start difference. First operand 1810 states and 2130 transitions. Second operand has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:47,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:47,130 INFO L93 Difference]: Finished difference Result 3392 states and 4017 transitions. [2021-08-26 04:26:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-26 04:26:47,131 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2021-08-26 04:26:47,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:47,135 INFO L225 Difference]: With dead ends: 3392 [2021-08-26 04:26:47,135 INFO L226 Difference]: Without dead ends: 1936 [2021-08-26 04:26:47,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 600.1ms TimeCoverageRelationStatistics Valid=923, Invalid=1429, Unknown=0, NotChecked=0, Total=2352 [2021-08-26 04:26:47,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-08-26 04:26:47,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1869. [2021-08-26 04:26:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.1734475374732334) internal successors, (2192), 1868 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:47,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2192 transitions. [2021-08-26 04:26:47,233 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2192 transitions. Word has length 156 [2021-08-26 04:26:47,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:47,234 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2192 transitions. [2021-08-26 04:26:47,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.183673469387755) internal successors, (156), 48 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:47,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2192 transitions. [2021-08-26 04:26:47,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-08-26 04:26:47,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:47,236 INFO L512 BasicCegarLoop]: trace histogram [46, 46, 45, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:47,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:47,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-08-26 04:26:47,441 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:47,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:47,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1319566561, now seen corresponding path program 2 times [2021-08-26 04:26:47,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:47,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279681932] [2021-08-26 04:26:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:47,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 1636 proven. 782 refuted. 0 times theorem prover too weak. 787 trivial. 0 not checked. [2021-08-26 04:26:47,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:47,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279681932] [2021-08-26 04:26:47,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279681932] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:47,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202236432] [2021-08-26 04:26:47,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:26:47,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:47,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:47,821 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:47,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-26 04:26:49,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:26:49,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:26:49,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 04:26:49,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 1635 proven. 782 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-08-26 04:26:50,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202236432] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:50,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:50,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 51 [2021-08-26 04:26:50,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370150879] [2021-08-26 04:26:50,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-26 04:26:50,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:50,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-26 04:26:50,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1698, Unknown=0, NotChecked=0, Total=2652 [2021-08-26 04:26:50,127 INFO L87 Difference]: Start difference. First operand 1869 states and 2192 transitions. Second operand has 52 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:50,972 INFO L93 Difference]: Finished difference Result 4186 states and 5017 transitions. [2021-08-26 04:26:50,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-26 04:26:50,972 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2021-08-26 04:26:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:50,976 INFO L225 Difference]: With dead ends: 4186 [2021-08-26 04:26:50,976 INFO L226 Difference]: Without dead ends: 2509 [2021-08-26 04:26:50,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1964 ImplicationChecksByTransitivity, 1175.6ms TimeCoverageRelationStatistics Valid=2098, Invalid=4708, Unknown=0, NotChecked=0, Total=6806 [2021-08-26 04:26:50,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-08-26 04:26:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1941. [2021-08-26 04:26:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1941 states, 1940 states have (on average 1.172680412371134) internal successors, (2275), 1940 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:51,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1941 states to 1941 states and 2275 transitions. [2021-08-26 04:26:51,084 INFO L78 Accepts]: Start accepts. Automaton has 1941 states and 2275 transitions. Word has length 159 [2021-08-26 04:26:51,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:51,084 INFO L470 AbstractCegarLoop]: Abstraction has 1941 states and 2275 transitions. [2021-08-26 04:26:51,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.1153846153846154) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:51,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1941 states and 2275 transitions. [2021-08-26 04:26:51,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-08-26 04:26:51,086 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:51,087 INFO L512 BasicCegarLoop]: trace histogram [48, 48, 47, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:51,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:51,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:51,289 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:51,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:51,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1553693227, now seen corresponding path program 3 times [2021-08-26 04:26:51,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:51,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863783887] [2021-08-26 04:26:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:51,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:51,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 1779 proven. 852 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2021-08-26 04:26:51,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:51,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863783887] [2021-08-26 04:26:51,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863783887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:51,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540725559] [2021-08-26 04:26:51,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:26:51,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:51,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:51,698 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:51,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-26 04:26:53,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 04:26:53,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:26:53,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 04:26:53,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 3386 trivial. 0 not checked. [2021-08-26 04:26:53,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540725559] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:26:53,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 04:26:53,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [28] total 32 [2021-08-26 04:26:53,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653452249] [2021-08-26 04:26:53,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 04:26:53,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:53,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 04:26:53,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=653, Unknown=0, NotChecked=0, Total=992 [2021-08-26 04:26:53,412 INFO L87 Difference]: Start difference. First operand 1941 states and 2275 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:53,545 INFO L93 Difference]: Finished difference Result 2712 states and 3137 transitions. [2021-08-26 04:26:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 04:26:53,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-08-26 04:26:53,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:53,547 INFO L225 Difference]: With dead ends: 2712 [2021-08-26 04:26:53,548 INFO L226 Difference]: Without dead ends: 1328 [2021-08-26 04:26:53,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 397.8ms TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 04:26:53,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2021-08-26 04:26:53,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1178. [2021-08-26 04:26:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1178 states, 1177 states have (on average 1.1257434154630417) internal successors, (1325), 1177 states have internal predecessors, (1325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:53,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1178 states to 1178 states and 1325 transitions. [2021-08-26 04:26:53,638 INFO L78 Accepts]: Start accepts. Automaton has 1178 states and 1325 transitions. Word has length 165 [2021-08-26 04:26:53,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:53,639 INFO L470 AbstractCegarLoop]: Abstraction has 1178 states and 1325 transitions. [2021-08-26 04:26:53,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:53,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1178 states and 1325 transitions. [2021-08-26 04:26:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-08-26 04:26:53,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:53,640 INFO L512 BasicCegarLoop]: trace histogram [48, 48, 47, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:53,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-26 04:26:53,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-26 04:26:53,867 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:53,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:53,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1555540269, now seen corresponding path program 7 times [2021-08-26 04:26:53,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:53,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86085322] [2021-08-26 04:26:53,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:53,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 913 proven. 2575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:26:54,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:26:54,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86085322] [2021-08-26 04:26:54,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86085322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:54,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339872497] [2021-08-26 04:26:54,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:26:54,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:26:54,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:26:54,697 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:26:54,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-26 04:26:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:26:56,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-26 04:26:56,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:26:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3488 backedges. 1778 proven. 852 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2021-08-26 04:26:57,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339872497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:26:57,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:26:57,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 27] total 77 [2021-08-26 04:26:57,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502656276] [2021-08-26 04:26:57,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-08-26 04:26:57,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:26:57,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-08-26 04:26:57,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1329, Invalid=4523, Unknown=0, NotChecked=0, Total=5852 [2021-08-26 04:26:57,343 INFO L87 Difference]: Start difference. First operand 1178 states and 1325 transitions. Second operand has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:58,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:26:58,946 INFO L93 Difference]: Finished difference Result 2412 states and 2752 transitions. [2021-08-26 04:26:58,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-26 04:26:58,946 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2021-08-26 04:26:58,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:26:58,948 INFO L225 Difference]: With dead ends: 2412 [2021-08-26 04:26:58,948 INFO L226 Difference]: Without dead ends: 1441 [2021-08-26 04:26:58,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4685 ImplicationChecksByTransitivity, 2370.9ms TimeCoverageRelationStatistics Valid=4308, Invalid=12204, Unknown=0, NotChecked=0, Total=16512 [2021-08-26 04:26:58,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-08-26 04:26:59,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1211. [2021-08-26 04:26:59,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 1.1231404958677687) internal successors, (1359), 1210 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:59,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1359 transitions. [2021-08-26 04:26:59,033 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1359 transitions. Word has length 165 [2021-08-26 04:26:59,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:26:59,034 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 1359 transitions. [2021-08-26 04:26:59,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.220779220779221) internal successors, (248), 77 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:26:59,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1359 transitions. [2021-08-26 04:26:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-08-26 04:26:59,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:26:59,036 INFO L512 BasicCegarLoop]: trace histogram [50, 50, 49, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:26:59,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-26 04:26:59,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-26 04:26:59,249 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:26:59,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:26:59,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1830883295, now seen corresponding path program 8 times [2021-08-26 04:26:59,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:26:59,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830634334] [2021-08-26 04:26:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:26:59,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:26:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:27:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 988 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:27:00,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:27:00,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830634334] [2021-08-26 04:27:00,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830634334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:27:00,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556980690] [2021-08-26 04:27:00,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:27:00,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:27:00,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:27:00,189 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:27:00,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-26 04:27:01,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:27:01,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:27:01,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-26 04:27:01,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:27:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 1927 proven. 925 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2021-08-26 04:27:03,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556980690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:27:03,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:27:03,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 28] total 80 [2021-08-26 04:27:03,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586076874] [2021-08-26 04:27:03,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-08-26 04:27:03,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:27:03,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-08-26 04:27:03,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1434, Invalid=4886, Unknown=0, NotChecked=0, Total=6320 [2021-08-26 04:27:03,079 INFO L87 Difference]: Start difference. First operand 1211 states and 1359 transitions. Second operand has 80 states, 80 states have (on average 3.2125) internal successors, (257), 80 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:27:04,733 INFO L93 Difference]: Finished difference Result 2481 states and 2824 transitions. [2021-08-26 04:27:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-26 04:27:04,734 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.2125) internal successors, (257), 80 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-08-26 04:27:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:27:04,736 INFO L225 Difference]: With dead ends: 2481 [2021-08-26 04:27:04,736 INFO L226 Difference]: Without dead ends: 1486 [2021-08-26 04:27:04,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5068 ImplicationChecksByTransitivity, 2579.1ms TimeCoverageRelationStatistics Valid=4649, Invalid=13173, Unknown=0, NotChecked=0, Total=17822 [2021-08-26 04:27:04,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-08-26 04:27:04,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1433. [2021-08-26 04:27:04,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 1.1410614525139664) internal successors, (1634), 1432 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:04,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 1634 transitions. [2021-08-26 04:27:04,814 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 1634 transitions. Word has length 171 [2021-08-26 04:27:04,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:27:04,814 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 1634 transitions. [2021-08-26 04:27:04,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.2125) internal successors, (257), 80 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:04,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 1634 transitions. [2021-08-26 04:27:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-08-26 04:27:04,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:27:04,816 INFO L512 BasicCegarLoop]: trace histogram [52, 52, 51, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:27:04,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-26 04:27:05,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-26 04:27:05,021 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:27:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:27:05,021 INFO L82 PathProgramCache]: Analyzing trace with hash 505372205, now seen corresponding path program 9 times [2021-08-26 04:27:05,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:27:05,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834187602] [2021-08-26 04:27:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:27:05,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:27:05,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:27:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 1066 proven. 3024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:27:06,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:27:06,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834187602] [2021-08-26 04:27:06,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834187602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:27:06,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640172272] [2021-08-26 04:27:06,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:27:06,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:27:06,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:27:06,052 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:27:06,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-26 04:27:07,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-26 04:27:07,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:27:07,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 04:27:07,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:27:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 2088 proven. 51 refuted. 0 times theorem prover too weak. 1951 trivial. 0 not checked. [2021-08-26 04:27:08,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640172272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:27:08,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:27:08,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 7] total 60 [2021-08-26 04:27:08,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982856106] [2021-08-26 04:27:08,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-26 04:27:08,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:27:08,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-26 04:27:08,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=2745, Unknown=0, NotChecked=0, Total=3540 [2021-08-26 04:27:08,196 INFO L87 Difference]: Start difference. First operand 1433 states and 1634 transitions. Second operand has 60 states, 60 states have (on average 3.2666666666666666) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:18,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:27:18,113 INFO L93 Difference]: Finished difference Result 2528 states and 2889 transitions. [2021-08-26 04:27:18,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2021-08-26 04:27:18,114 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.2666666666666666) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-08-26 04:27:18,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:27:18,116 INFO L225 Difference]: With dead ends: 2528 [2021-08-26 04:27:18,116 INFO L226 Difference]: Without dead ends: 1913 [2021-08-26 04:27:18,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47218 ImplicationChecksByTransitivity, 9973.8ms TimeCoverageRelationStatistics Valid=22272, Invalid=99180, Unknown=0, NotChecked=0, Total=121452 [2021-08-26 04:27:18,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-08-26 04:27:18,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1807. [2021-08-26 04:27:18,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1807 states, 1806 states have (on average 1.1450719822812847) internal successors, (2068), 1806 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1807 states to 1807 states and 2068 transitions. [2021-08-26 04:27:18,257 INFO L78 Accepts]: Start accepts. Automaton has 1807 states and 2068 transitions. Word has length 177 [2021-08-26 04:27:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:27:18,258 INFO L470 AbstractCegarLoop]: Abstraction has 1807 states and 2068 transitions. [2021-08-26 04:27:18,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.2666666666666666) internal successors, (196), 60 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:18,258 INFO L276 IsEmpty]: Start isEmpty. Operand 1807 states and 2068 transitions. [2021-08-26 04:27:18,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-08-26 04:27:18,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:27:18,261 INFO L512 BasicCegarLoop]: trace histogram [78, 78, 75, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 04:27:18,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-26 04:27:18,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-26 04:27:18,473 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:27:18,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:27:18,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1331899705, now seen corresponding path program 4 times [2021-08-26 04:27:18,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:27:18,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442156916] [2021-08-26 04:27:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:27:18,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:27:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:27:18,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9267 backedges. 4164 proven. 1001 refuted. 0 times theorem prover too weak. 4102 trivial. 0 not checked. [2021-08-26 04:27:18,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:27:18,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442156916] [2021-08-26 04:27:18,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442156916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:27:18,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849608582] [2021-08-26 04:27:18,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:27:18,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:27:18,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:27:18,929 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:27:18,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-26 04:27:20,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:27:20,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:27:20,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-26 04:27:20,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:27:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9267 backedges. 925 proven. 7341 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2021-08-26 04:27:25,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849608582] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:27:25,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:27:25,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 62] total 90 [2021-08-26 04:27:25,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020538074] [2021-08-26 04:27:25,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-08-26 04:27:25,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:27:25,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-08-26 04:27:25,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1261, Invalid=6749, Unknown=0, NotChecked=0, Total=8010 [2021-08-26 04:27:25,315 INFO L87 Difference]: Start difference. First operand 1807 states and 2068 transitions. Second operand has 90 states, 90 states have (on average 3.1777777777777776) internal successors, (286), 90 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:29,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:27:29,514 INFO L93 Difference]: Finished difference Result 3488 states and 4035 transitions. [2021-08-26 04:27:29,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-08-26 04:27:29,514 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.1777777777777776) internal successors, (286), 90 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-08-26 04:27:29,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:27:29,517 INFO L225 Difference]: With dead ends: 3488 [2021-08-26 04:27:29,518 INFO L226 Difference]: Without dead ends: 2293 [2021-08-26 04:27:29,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13421 ImplicationChecksByTransitivity, 5361.3ms TimeCoverageRelationStatistics Valid=6210, Invalid=33590, Unknown=0, NotChecked=0, Total=39800 [2021-08-26 04:27:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2293 states. [2021-08-26 04:27:29,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 1662. [2021-08-26 04:27:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 1.1523178807947019) internal successors, (1914), 1661 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 1914 transitions. [2021-08-26 04:27:29,619 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 1914 transitions. Word has length 263 [2021-08-26 04:27:29,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:27:29,619 INFO L470 AbstractCegarLoop]: Abstraction has 1662 states and 1914 transitions. [2021-08-26 04:27:29,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.1777777777777776) internal successors, (286), 90 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 1914 transitions. [2021-08-26 04:27:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-08-26 04:27:29,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:27:29,623 INFO L512 BasicCegarLoop]: trace histogram [81, 81, 78, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 04:27:29,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-26 04:27:29,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-26 04:27:29,827 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:27:29,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:27:29,827 INFO L82 PathProgramCache]: Analyzing trace with hash -282690071, now seen corresponding path program 5 times [2021-08-26 04:27:29,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:27:29,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032618918] [2021-08-26 04:27:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:27:29,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:27:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:27:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9987 backedges. 4486 proven. 1080 refuted. 0 times theorem prover too weak. 4421 trivial. 0 not checked. [2021-08-26 04:27:30,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:27:30,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032618918] [2021-08-26 04:27:30,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032618918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:27:30,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349381347] [2021-08-26 04:27:30,290 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:27:30,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:27:30,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:27:30,291 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:27:30,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-26 04:27:32,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2021-08-26 04:27:32,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:27:32,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-26 04:27:32,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:27:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9987 backedges. 4486 proven. 1080 refuted. 0 times theorem prover too weak. 4421 trivial. 0 not checked. [2021-08-26 04:27:33,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349381347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:27:33,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:27:33,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2021-08-26 04:27:33,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859691758] [2021-08-26 04:27:33,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-26 04:27:33,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:27:33,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-26 04:27:33,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=2089, Unknown=0, NotChecked=0, Total=3422 [2021-08-26 04:27:33,662 INFO L87 Difference]: Start difference. First operand 1662 states and 1914 transitions. Second operand has 59 states, 59 states have (on average 3.1186440677966103) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:33,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:27:33,961 INFO L93 Difference]: Finished difference Result 3197 states and 3696 transitions. [2021-08-26 04:27:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-26 04:27:33,961 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.1186440677966103) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 272 [2021-08-26 04:27:33,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:27:33,963 INFO L225 Difference]: With dead ends: 3197 [2021-08-26 04:27:33,963 INFO L226 Difference]: Without dead ends: 1782 [2021-08-26 04:27:33,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 800.5ms TimeCoverageRelationStatistics Valid=1333, Invalid=2089, Unknown=0, NotChecked=0, Total=3422 [2021-08-26 04:27:33,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1782 states. [2021-08-26 04:27:34,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1782 to 1725. [2021-08-26 04:27:34,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1725 states, 1724 states have (on average 1.148491879350348) internal successors, (1980), 1724 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1725 states to 1725 states and 1980 transitions. [2021-08-26 04:27:34,072 INFO L78 Accepts]: Start accepts. Automaton has 1725 states and 1980 transitions. Word has length 272 [2021-08-26 04:27:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:27:34,072 INFO L470 AbstractCegarLoop]: Abstraction has 1725 states and 1980 transitions. [2021-08-26 04:27:34,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.1186440677966103) internal successors, (184), 58 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:34,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1725 states and 1980 transitions. [2021-08-26 04:27:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-08-26 04:27:34,076 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:27:34,076 INFO L512 BasicCegarLoop]: trace histogram [84, 84, 81, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 04:27:34,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-26 04:27:34,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:27:34,293 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:27:34,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:27:34,293 INFO L82 PathProgramCache]: Analyzing trace with hash -407080135, now seen corresponding path program 6 times [2021-08-26 04:27:34,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:27:34,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758556205] [2021-08-26 04:27:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:27:34,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:27:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:27:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 10734 backedges. 4820 proven. 1162 refuted. 0 times theorem prover too weak. 4752 trivial. 0 not checked. [2021-08-26 04:27:34,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:27:34,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758556205] [2021-08-26 04:27:34,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758556205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:27:34,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310738006] [2021-08-26 04:27:34,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:27:34,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:27:34,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:27:34,767 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:27:34,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-26 04:27:36,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-26 04:27:36,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:27:36,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 04:27:36,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:27:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10734 backedges. 4914 proven. 1 refuted. 0 times theorem prover too weak. 5819 trivial. 0 not checked. [2021-08-26 04:27:37,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310738006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:27:37,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:27:37,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 8] total 38 [2021-08-26 04:27:37,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329161075] [2021-08-26 04:27:37,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-26 04:27:37,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:27:37,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-26 04:27:37,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=921, Unknown=0, NotChecked=0, Total=1406 [2021-08-26 04:27:37,731 INFO L87 Difference]: Start difference. First operand 1725 states and 1980 transitions. Second operand has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:39,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:27:39,957 INFO L93 Difference]: Finished difference Result 3341 states and 3870 transitions. [2021-08-26 04:27:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-26 04:27:39,958 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2021-08-26 04:27:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:27:39,958 INFO L225 Difference]: With dead ends: 3341 [2021-08-26 04:27:39,958 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 04:27:39,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 2221.3ms TimeCoverageRelationStatistics Valid=3231, Invalid=7071, Unknown=0, NotChecked=0, Total=10302 [2021-08-26 04:27:39,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 04:27:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 04:27:39,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:39,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 04:27:39,961 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 281 [2021-08-26 04:27:39,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:27:39,961 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 04:27:39,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:27:39,961 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 04:27:39,961 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 04:27:39,963 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 04:27:39,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-26 04:27:40,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-26 04:27:40,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 04:27:40,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 04:28:26,686 WARN L207 SmtUtils]: Spent 46.50 s on a formula simplification. DAG size of input: 5989 DAG size of output: 3713 [2021-08-26 04:28:26,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 04:28:26,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 04:30:15,670 WARN L207 SmtUtils]: Spent 1.81 m on a formula simplification. DAG size of input: 3366 DAG size of output: 301 [2021-08-26 04:30:16,077 INFO L857 garLoopResultBuilder]: For program point L27-2(lines 27 29) no Hoare annotation was computed. [2021-08-26 04:30:16,077 INFO L853 garLoopResultBuilder]: At program point L27-3(lines 27 29) the Hoare annotation is: (let ((.cse13 (+ ~last~0 1)) (.cse14 (<= (+ ULTIMATE.start_main_~d~0 199998) ~SIZE~0)) (.cse15 (<= (+ ~last~0 199978) ~SIZE~0)) (.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse2 (= ULTIMATE.start_main_~d~0 0)) (.cse3 (< 0 ~last~0)) (.cse5 (= ULTIMATE.start_main_~st~0 1))) (let ((.cse11 (<= ULTIMATE.start_main_~c~0 21)) (.cse20 (<= ULTIMATE.start_main_~c~0 10)) (.cse21 (<= ~last~0 23)) (.cse22 (= ULTIMATE.start_main_~c~0 0)) (.cse16 (<= ULTIMATE.start_main_~c~0 7)) (.cse28 (<= ULTIMATE.start_main_~c~0 13)) (.cse4 (<= ULTIMATE.start_main_~c~0 1)) (.cse23 (<= 3 ULTIMATE.start_main_~c~0)) (.cse24 (<= ULTIMATE.start_main_~c~0 3)) (.cse17 (<= ULTIMATE.start_main_~c~0 5)) (.cse26 (<= ULTIMATE.start_main_~c~0 12)) (.cse25 (<= ULTIMATE.start_main_~c~0 19)) (.cse27 (<= ULTIMATE.start_main_~c~0 20)) (.cse7 (or (and .cse0 .cse14 .cse15 .cse3 .cse5) (and .cse0 .cse2 .cse3 .cse5))) (.cse8 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse9 (< ULTIMATE.start_main_~c~0 .cse13)) (.cse12 (< ULTIMATE.start_main_~c~0 (+ ~SIZE~0 1))) (.cse1 (= ULTIMATE.start_main_~b~0 0)) (.cse18 (<= .cse13 ULTIMATE.start_main_~c~0)) (.cse19 (= ULTIMATE.start_main_~st~0 0)) (.cse10 (<= 200000 ~SIZE~0)) (.cse6 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0))) (or (and .cse0 .cse1 (<= 1 ULTIMATE.start_main_~c~0) .cse2 .cse3 .cse4 .cse5 .cse6 (<= (+ ULTIMATE.start_main_~c~0 199999) ~SIZE~0)) (and (<= ULTIMATE.start_main_~c~0 14) .cse7 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 9)) .cse8 .cse9 .cse10 .cse6) (and .cse0 .cse1 (<= 21 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse11 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 2)) .cse7 .cse8 .cse9 .cse11 .cse10 .cse6) (and .cse12 .cse0 .cse8 (< ~SIZE~0 .cse13) .cse2 .cse5 .cse10 .cse6) (and .cse0 .cse14 .cse8 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 16)) .cse15 .cse9 .cse3 .cse16 .cse5 .cse10 .cse6) (and .cse0 (<= 5 ULTIMATE.start_main_~c~0) .cse1 .cse17 .cse2 .cse9 .cse5 .cse10 .cse6) (and .cse12 .cse0 .cse8 .cse18 .cse2 .cse19 .cse3 .cse10 .cse6) (and (<= ULTIMATE.start_main_~c~0 4) .cse0 .cse14 (<= ~last~0 (+ 19 ULTIMATE.start_main_~c~0)) .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199994) ~SIZE~0) (<= 6 ULTIMATE.start_main_~c~0) .cse5 .cse6) (and .cse0 (<= ULTIMATE.start_main_~c~0 15) .cse14 .cse8 .cse15 .cse9 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 8)) .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse14 .cse8 .cse15 .cse9 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 13)) .cse3 .cse5 .cse10 .cse6 .cse20) (and (<= ULTIMATE.start_main_~c~0 2) .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 21)) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and (<= 24 ULTIMATE.start_main_~c~0) .cse0 .cse1 .cse2 .cse9 (<= ULTIMATE.start_main_~c~0 24) .cse5 .cse10 .cse6) (and .cse0 .cse14 .cse8 .cse15 .cse3 .cse21 .cse5 .cse10 .cse6 .cse22) (and .cse12 .cse0 .cse1 .cse2 .cse9 (<= 25 ULTIMATE.start_main_~c~0) .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199991) ~SIZE~0) .cse2 .cse9 .cse5 .cse6 (<= 9 ULTIMATE.start_main_~c~0)) (and .cse0 .cse14 (<= ~last~0 ULTIMATE.start_main_~c~0) .cse8 (<= ULTIMATE.start_main_~c~0 23) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199978) ~SIZE~0) .cse2 .cse9 (<= 22 ULTIMATE.start_main_~c~0) .cse5 .cse6) (and .cse0 .cse1 (<= 10 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse5 .cse10 .cse6 .cse20) (and .cse12 .cse0 .cse14 .cse8 .cse18 .cse15 .cse19 .cse3 .cse21 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse9 (<= 16 ULTIMATE.start_main_~c~0) .cse5 .cse6 (<= (+ 199984 ULTIMATE.start_main_~c~0) ~SIZE~0)) (and .cse23 .cse0 .cse1 .cse24 .cse2 .cse9 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199986) ~SIZE~0) (<= 14 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse5 .cse6) (and .cse0 .cse14 .cse8 .cse25 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 4))) (and .cse0 .cse1 (<= 23 ULTIMATE.start_main_~c~0) (<= (+ ULTIMATE.start_main_~c~0 199977) ~SIZE~0) .cse2 .cse9 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse3 .cse5 .cse10 .cse6 .cse22) (and .cse0 .cse1 (<= 12 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse26 .cse5 .cse10 .cse6) (and (<= 7 ULTIMATE.start_main_~c~0) .cse0 .cse1 .cse2 .cse9 .cse16 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= 18 ULTIMATE.start_main_~c~0) .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199982) ~SIZE~0) .cse5 .cse6) (and .cse0 (<= ULTIMATE.start_main_~c~0 8) .cse14 .cse8 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 15)) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= 11 ULTIMATE.start_main_~c~0) .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199989) ~SIZE~0) .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse9 .cse27 .cse5 .cse10 (<= 20 ULTIMATE.start_main_~c~0) .cse6) (and .cse0 (<= ULTIMATE.start_main_~c~0 17) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 6))) (and .cse0 .cse14 .cse8 .cse28 .cse15 .cse9 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 10)) .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= 13 ULTIMATE.start_main_~c~0) .cse28 .cse2 .cse9 .cse5 .cse10 .cse6) (and .cse0 (< ULTIMATE.start_main_~c~0 ~SIZE~0) .cse8 .cse2 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse14 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 22)) .cse8 .cse15 .cse3 .cse4 .cse5 .cse10 .cse6) (and (<= ULTIMATE.start_main_~c~0 18) .cse0 .cse14 .cse8 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 5)) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse9 .cse5 .cse6 (<= (+ ULTIMATE.start_main_~c~0 199992) ~SIZE~0) (<= 8 ULTIMATE.start_main_~c~0)) (and .cse0 (<= ULTIMATE.start_main_~c~0 9) .cse14 .cse8 .cse15 .cse9 .cse3 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 14)) .cse5 .cse10 .cse6) (and (<= ULTIMATE.start_main_~c~0 11) .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 12)) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 20)) .cse0 .cse24 .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse23 .cse0 (<= ~last~0 3) .cse24 .cse14 .cse8 .cse3 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 18)) .cse0 .cse14 .cse17 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse14 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 17)) .cse8 (<= ULTIMATE.start_main_~c~0 6) .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 (<= (+ ULTIMATE.start_main_~c~0 199983) ~SIZE~0) (<= 17 ULTIMATE.start_main_~c~0) .cse2 .cse9 .cse5 .cse6) (and .cse0 .cse1 .cse2 .cse9 (<= 2 ULTIMATE.start_main_~c~0) (<= (+ ULTIMATE.start_main_~c~0 199998) ~SIZE~0) .cse5 .cse6) (and (<= (+ 199996 ULTIMATE.start_main_~c~0) ~SIZE~0) .cse0 .cse1 .cse2 .cse9 .cse5 .cse6 (<= 4 ULTIMATE.start_main_~c~0)) (and .cse0 .cse1 (<= 15 ULTIMATE.start_main_~c~0) .cse2 .cse9 (<= (+ ULTIMATE.start_main_~c~0 199985) ~SIZE~0) .cse5 .cse6) (and .cse7 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 11)) .cse8 .cse9 .cse26 .cse10 .cse6) (and .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 1)) (<= ULTIMATE.start_main_~c~0 22) .cse14 .cse8 .cse15 .cse9 .cse3 .cse5 .cse10 .cse6) (and .cse0 .cse1 .cse2 .cse25 .cse9 (<= 19 ULTIMATE.start_main_~c~0) .cse5 .cse10 .cse6) (and .cse0 (<= ~last~0 (+ ULTIMATE.start_main_~c~0 3)) .cse14 .cse8 .cse15 .cse9 .cse27 .cse3 .cse5 .cse10 .cse6) (and (<= ~last~0 (+ ULTIMATE.start_main_~c~0 7)) (<= ULTIMATE.start_main_~c~0 16) .cse7 .cse8 .cse9 .cse10 .cse6) (and .cse12 .cse0 .cse1 .cse18 .cse2 .cse19 .cse3 .cse10 .cse6)))) [2021-08-26 04:30:16,078 INFO L857 garLoopResultBuilder]: For program point L27-4(lines 25 45) no Hoare annotation was computed. [2021-08-26 04:30:16,078 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 13) no Hoare annotation was computed. [2021-08-26 04:30:16,078 INFO L853 garLoopResultBuilder]: At program point L11-2(lines 10 45) the Hoare annotation is: (let ((.cse0 (< ULTIMATE.start_main_~c~0 (+ ~SIZE~0 1))) (.cse1 (= ULTIMATE.start_assume_abort_if_not_~cond 1)) (.cse2 (<= ~SIZE~0 ULTIMATE.start_main_~c~0)) (.cse3 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse7 (= ULTIMATE.start_main_~d~0 0)) (.cse4 (< 0 ~last~0)) (.cse5 (<= 200000 ~SIZE~0)) (.cse6 (= ULTIMATE.start_main_~b~0 ULTIMATE.start_main_~a~0))) (or (and .cse0 .cse1 .cse2 (<= (+ ULTIMATE.start_main_~d~0 199998) ~SIZE~0) .cse3 (<= (+ ~last~0 199978) ~SIZE~0) .cse4 (<= ~last~0 23) .cse5 .cse6) (and .cse1 (= ULTIMATE.start_main_~b~0 0) .cse7 .cse4 .cse5 .cse6 (= ULTIMATE.start_main_~c~0 0)) (and .cse0 .cse1 .cse2 .cse3 .cse7 .cse4 .cse5 .cse6))) [2021-08-26 04:30:16,078 INFO L857 garLoopResultBuilder]: For program point L36(lines 36 38) no Hoare annotation was computed. [2021-08-26 04:30:16,078 INFO L857 garLoopResultBuilder]: For program point L36-2(lines 25 45) no Hoare annotation was computed. [2021-08-26 04:30:16,079 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 04:30:16,079 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 04:30:16,079 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 04:30:16,079 INFO L857 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2021-08-26 04:30:16,079 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-08-26 04:30:16,079 INFO L857 garLoopResultBuilder]: For program point L12(line 12) no Hoare annotation was computed. [2021-08-26 04:30:16,079 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 04:30:16,079 INFO L857 garLoopResultBuilder]: For program point L25-2(lines 25 45) no Hoare annotation was computed. [2021-08-26 04:30:16,079 INFO L853 garLoopResultBuilder]: At program point L46(lines 20 47) the Hoare annotation is: false [2021-08-26 04:30:16,079 INFO L857 garLoopResultBuilder]: For program point L5(lines 5 7) no Hoare annotation was computed. [2021-08-26 04:30:16,079 INFO L857 garLoopResultBuilder]: For program point L30-1(lines 25 45) no Hoare annotation was computed. [2021-08-26 04:30:16,079 INFO L857 garLoopResultBuilder]: For program point L6(line 6) no Hoare annotation was computed. [2021-08-26 04:30:16,079 INFO L857 garLoopResultBuilder]: For program point L39-1(lines 39 42) no Hoare annotation was computed. [2021-08-26 04:30:16,082 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 04:30:16,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 04:30:16 BoogieIcfgContainer [2021-08-26 04:30:16,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 04:30:16,171 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 04:30:16,171 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 04:30:16,171 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 04:30:16,172 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:25:50" (3/4) ... [2021-08-26 04:30:16,174 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 04:30:16,184 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-26 04:30:16,184 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 04:30:16,184 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 04:30:16,185 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 04:30:16,222 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 04:30:16,222 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 04:30:16,223 INFO L168 Benchmark]: Toolchain (without parser) took 266222.39 ms. Allocated memory was 58.7 MB in the beginning and 4.5 GB in the end (delta: 4.5 GB). Free memory was 37.8 MB in the beginning and 2.5 GB in the end (delta: -2.5 GB). Peak memory consumption was 2.0 GB. Max. memory is 16.1 GB. [2021-08-26 04:30:16,223 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 58.7 MB. Free memory was 41.2 MB in the beginning and 41.1 MB in the end (delta: 50.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 04:30:16,224 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.32 ms. Allocated memory is still 58.7 MB. Free memory was 37.7 MB in the beginning and 27.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 04:30:16,224 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.83 ms. Allocated memory is still 58.7 MB. Free memory was 27.9 MB in the beginning and 26.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 04:30:16,225 INFO L168 Benchmark]: Boogie Preprocessor took 15.49 ms. Allocated memory is still 58.7 MB. Free memory was 26.3 MB in the beginning and 25.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 04:30:16,225 INFO L168 Benchmark]: RCFGBuilder took 359.12 ms. Allocated memory is still 58.7 MB. Free memory was 25.2 MB in the beginning and 30.5 MB in the end (delta: -5.3 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-08-26 04:30:16,226 INFO L168 Benchmark]: TraceAbstraction took 265595.66 ms. Allocated memory was 58.7 MB in the beginning and 4.5 GB in the end (delta: 4.5 GB). Free memory was 30.1 MB in the beginning and 2.5 GB in the end (delta: -2.5 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.1 GB. [2021-08-26 04:30:16,226 INFO L168 Benchmark]: Witness Printer took 51.32 ms. Allocated memory is still 4.5 GB. Free memory was 2.5 GB in the beginning and 2.5 GB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 04:30:16,227 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 58.7 MB. Free memory was 41.2 MB in the beginning and 41.1 MB in the end (delta: 50.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 168.32 ms. Allocated memory is still 58.7 MB. Free memory was 37.7 MB in the beginning and 27.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 24.83 ms. Allocated memory is still 58.7 MB. Free memory was 27.9 MB in the beginning and 26.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 15.49 ms. Allocated memory is still 58.7 MB. Free memory was 26.3 MB in the beginning and 25.3 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 359.12 ms. Allocated memory is still 58.7 MB. Free memory was 25.2 MB in the beginning and 30.5 MB in the end (delta: -5.3 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 265595.66 ms. Allocated memory was 58.7 MB in the beginning and 4.5 GB in the end (delta: 4.5 GB). Free memory was 30.1 MB in the beginning and 2.5 GB in the end (delta: -2.5 GB). Peak memory consumption was 3.0 GB. Max. memory is 16.1 GB. * Witness Printer took 51.32 ms. Allocated memory is still 4.5 GB. Free memory was 2.5 GB in the beginning and 2.5 GB in the end (delta: 4.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 265461.8ms, OverallIterations: 43, TraceHistogramMax: 84, EmptinessCheckTime: 57.8ms, AutomataDifference: 39515.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 155907.2ms, InitialAbstractionConstructionTime: 7.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 600 SDtfs, 10075 SDslu, 1217 SDs, 0 SdLazy, 11151 SolverSat, 2479 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5882.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5567 GetRequests, 3280 SyntacticMatches, 0 SemanticMatches, 2287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108761 ImplicationChecksByTransitivity, 42901.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1941occurred in iteration=36, InterpolantAutomatonStates: 1668, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 2116.6ms AutomataMinimizationTime, 43 MinimizatonAttempts, 10035 StatesRemovedByMinimization, 41 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 646 NumberOfFragments, 2105 HoareAnnotationTreeSize, 3 FomulaSimplifications, 63740626284713 FormulaSimplificationTreeSizeReduction, 46763.7ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 12598421229953 FormulaSimplificationTreeSizeReductionInter, 109113.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 431.3ms SsaConstructionTime, 1274.4ms SatisfiabilityAnalysisTime, 34628.6ms InterpolantComputationTime, 7670 NumberOfCodeBlocks, 6667 NumberOfCodeBlocksAsserted, 181 NumberOfCheckSat, 7592 ConstructedInterpolants, 0 QuantifiedInterpolants, 29362 SizeOfPredicates, 120 NumberOfNonLiveVariables, 6478 ConjunctsInSsa, 582 ConjunctsInUnsatCore, 78 InterpolantComputations, 13 PerfectInterpolantSequences, 105695/148357 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((cond == 1 && b == 0) && 1 <= c) && d == 0) && 0 < last) && c <= 1) && st == 1) && b == a) && c + 199999 <= SIZE) || ((((((c <= 14 && (((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1))) && last <= c + 9) && 1 == cond) && c < last + 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && b == 0) && 21 <= c) && d == 0) && c < last + 1) && c <= 21) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((last <= c + 2 && (((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1))) && 1 == cond) && c < last + 1) && c <= 21) && 200000 <= SIZE) && b == a)) || (((((((c < SIZE + 1 && cond == 1) && 1 == cond) && SIZE < last + 1) && d == 0) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && last <= c + 16) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && c <= 7) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && 5 <= c) && b == 0) && c <= 5) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((c < SIZE + 1 && cond == 1) && 1 == cond) && last + 1 <= c) && d == 0) && st == 0) && 0 < last) && 200000 <= SIZE) && b == a)) || ((((((((((c <= 4 && cond == 1) && d + 199998 <= SIZE) && last <= 19 + c) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && c + 199994 <= SIZE) && 6 <= c) && st == 1) && b == a)) || ((((((((((cond == 1 && c <= 15) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && last <= c + 8) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && last <= c + 13) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && c <= 10)) || ((((((((((c <= 2 && cond == 1) && last <= c + 21) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((24 <= c && cond == 1) && b == 0) && d == 0) && c < last + 1) && c <= 24) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && 0 < last) && last <= 23) && st == 1) && 200000 <= SIZE) && b == a) && c == 0)) || ((((((((c < SIZE + 1 && cond == 1) && b == 0) && d == 0) && c < last + 1) && 25 <= c) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199991 <= SIZE) && d == 0) && c < last + 1) && st == 1) && b == a) && 9 <= c)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && last <= c) && 1 == cond) && c <= 23) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199978 <= SIZE) && d == 0) && c < last + 1) && 22 <= c) && st == 1) && b == a)) || ((((((((cond == 1 && b == 0) && 10 <= c) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a) && c <= 10)) || ((((((((((c < SIZE + 1 && cond == 1) && d + 199998 <= SIZE) && 1 == cond) && last + 1 <= c) && last + 199978 <= SIZE) && st == 0) && 0 < last) && last <= 23) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && 16 <= c) && st == 1) && b == a) && 199984 + c <= SIZE)) || ((((((((3 <= c && cond == 1) && b == 0) && c <= 3) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199986 <= SIZE) && 14 <= c) && d == 0) && c < last + 1) && st == 1) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && c <= 19) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && last <= c + 4)) || (((((((cond == 1 && b == 0) && 23 <= c) && c + 199977 <= SIZE) && d == 0) && c < last + 1) && st == 1) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && c == 0)) || ((((((((cond == 1 && b == 0) && 12 <= c) && d == 0) && c < last + 1) && c <= 12) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((7 <= c && cond == 1) && b == 0) && d == 0) && c < last + 1) && c <= 7) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && 18 <= c) && d == 0) && c < last + 1) && c + 199982 <= SIZE) && st == 1) && b == a)) || ((((((((((cond == 1 && c <= 8) && d + 199998 <= SIZE) && 1 == cond) && last <= c + 15) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && 11 <= c) && d == 0) && c < last + 1) && c + 199989 <= SIZE) && st == 1) && b == a)) || ((((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && c <= 20) && st == 1) && 200000 <= SIZE) && 20 <= c) && b == a)) || ((((((((((cond == 1 && c <= 17) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a) && last <= c + 6)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && 1 == cond) && c <= 13) && last + 199978 <= SIZE) && c < last + 1) && last <= c + 10) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && b == 0) && 13 <= c) && c <= 13) && d == 0) && c < last + 1) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && c < SIZE) && 1 == cond) && d == 0) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((((cond == 1 && d + 199998 <= SIZE) && last <= c + 22) && 1 == cond) && last + 199978 <= SIZE) && 0 < last) && c <= 1) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((c <= 18 && cond == 1) && d + 199998 <= SIZE) && 1 == cond) && last <= c + 5) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && st == 1) && b == a) && c + 199992 <= SIZE) && 8 <= c)) || ((((((((((cond == 1 && c <= 9) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && last <= c + 14) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((c <= 11 && cond == 1) && last <= c + 12) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((last <= c + 20 && cond == 1) && c <= 3) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((((3 <= c && cond == 1) && last <= 3) && c <= 3) && d + 199998 <= SIZE) && 1 == cond) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((last <= c + 18 && cond == 1) && d + 199998 <= SIZE) && c <= 5) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && d + 199998 <= SIZE) && last <= c + 17) && 1 == cond) && c <= 6) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || (((((((cond == 1 && b == 0) && c + 199983 <= SIZE) && 17 <= c) && d == 0) && c < last + 1) && st == 1) && b == a)) || (((((((cond == 1 && b == 0) && d == 0) && c < last + 1) && 2 <= c) && c + 199998 <= SIZE) && st == 1) && b == a)) || (((((((199996 + c <= SIZE && cond == 1) && b == 0) && d == 0) && c < last + 1) && st == 1) && b == a) && 4 <= c)) || (((((((cond == 1 && b == 0) && 15 <= c) && d == 0) && c < last + 1) && c + 199985 <= SIZE) && st == 1) && b == a)) || (((((((((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1)) && last <= c + 11) && 1 == cond) && c < last + 1) && c <= 12) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && last <= c + 1) && c <= 22) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((cond == 1 && b == 0) && d == 0) && c <= 19) && c < last + 1) && 19 <= c) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((((((cond == 1 && last <= c + 3) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && c < last + 1) && c <= 20) && 0 < last) && st == 1) && 200000 <= SIZE) && b == a)) || ((((((last <= c + 7 && c <= 16) && (((((cond == 1 && d + 199998 <= SIZE) && last + 199978 <= SIZE) && 0 < last) && st == 1) || (((cond == 1 && d == 0) && 0 < last) && st == 1))) && 1 == cond) && c < last + 1) && 200000 <= SIZE) && b == a)) || ((((((((c < SIZE + 1 && cond == 1) && b == 0) && last + 1 <= c) && d == 0) && st == 0) && 0 < last) && 200000 <= SIZE) && b == a) - InvariantResult [Line: 10]: Loop Invariant Derived loop invariant: ((((((((((c < SIZE + 1 && cond == 1) && SIZE <= c) && d + 199998 <= SIZE) && 1 == cond) && last + 199978 <= SIZE) && 0 < last) && last <= 23) && 200000 <= SIZE) && b == a) || ((((((cond == 1 && b == 0) && d == 0) && 0 < last) && 200000 <= SIZE) && b == a) && c == 0)) || (((((((c < SIZE + 1 && cond == 1) && SIZE <= c) && 1 == cond) && d == 0) && 0 < last) && 200000 <= SIZE) && b == a) RESULT: Ultimate proved your program to be correct! [2021-08-26 04:30:16,447 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-08-26 04:30:16,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...