./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i --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/loop-zilu/benchmark23_conjunctive.i -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 becf68b1b41bf8f9c75117f82605e436bc8d5a41 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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 04:42:36,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 04:42:36,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 04:42:36,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 04:42:36,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 04:42:36,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 04:42:36,130 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 04:42:36,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 04:42:36,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 04:42:36,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 04:42:36,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 04:42:36,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 04:42:36,135 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 04:42:36,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 04:42:36,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 04:42:36,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 04:42:36,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 04:42:36,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 04:42:36,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 04:42:36,140 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 04:42:36,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 04:42:36,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 04:42:36,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 04:42:36,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 04:42:36,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 04:42:36,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 04:42:36,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 04:42:36,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 04:42:36,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 04:42:36,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 04:42:36,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 04:42:36,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 04:42:36,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 04:42:36,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 04:42:36,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 04:42:36,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 04:42:36,163 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 04:42:36,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 04:42:36,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 04:42:36,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 04:42:36,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 04:42:36,173 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 04:42:36,193 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 04:42:36,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 04:42:36,194 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 04:42:36,195 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 04:42:36,195 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 04:42:36,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 04:42:36,196 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 04:42:36,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 04:42:36,197 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 04:42:36,197 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 04:42:36,197 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 04:42:36,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 04:42:36,198 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 04:42:36,198 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 04:42:36,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 04:42:36,198 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 04:42:36,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 04:42:36,198 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 04:42:36,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 04:42:36,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 04:42:36,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 04:42:36,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 04:42:36,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 04:42:36,199 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 04:42:36,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 04:42:36,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 04:42:36,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 04:42:36,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 04:42:36,200 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 04:42:36,200 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 04:42:36,200 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> becf68b1b41bf8f9c75117f82605e436bc8d5a41 [2021-08-26 04:42:36,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 04:42:36,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 04:42:36,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 04:42:36,482 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 04:42:36,483 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 04:42:36,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2021-08-26 04:42:36,546 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3601a45b3/fd2f3e287ec8455fbf88474f9f108794/FLAGccdd90dc7 [2021-08-26 04:42:36,901 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 04:42:36,902 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2021-08-26 04:42:36,907 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3601a45b3/fd2f3e287ec8455fbf88474f9f108794/FLAGccdd90dc7 [2021-08-26 04:42:36,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3601a45b3/fd2f3e287ec8455fbf88474f9f108794 [2021-08-26 04:42:36,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 04:42:36,931 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 04:42:36,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 04:42:36,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 04:42:36,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 04:42:36,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:42:36" (1/1) ... [2021-08-26 04:42:36,936 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a93432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:42:36, skipping insertion in model container [2021-08-26 04:42:36,936 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:42:36" (1/1) ... [2021-08-26 04:42:36,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 04:42:36,954 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 04:42:37,032 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/loop-zilu/benchmark23_conjunctive.i[873,886] [2021-08-26 04:42:37,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 04:42:37,045 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 04:42:37,062 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/loop-zilu/benchmark23_conjunctive.i[873,886] [2021-08-26 04:42:37,065 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 04:42:37,081 INFO L208 MainTranslator]: Completed translation [2021-08-26 04:42:37,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:42:37 WrapperNode [2021-08-26 04:42:37,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 04:42:37,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 04:42:37,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 04:42:37,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 04:42:37,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:42:37" (1/1) ... [2021-08-26 04:42:37,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:42:37" (1/1) ... [2021-08-26 04:42:37,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 04:42:37,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 04:42:37,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 04:42:37,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 04:42:37,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:42:37" (1/1) ... [2021-08-26 04:42:37,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:42:37" (1/1) ... [2021-08-26 04:42:37,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:42:37" (1/1) ... [2021-08-26 04:42:37,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:42:37" (1/1) ... [2021-08-26 04:42:37,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:42:37" (1/1) ... [2021-08-26 04:42:37,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:42:37" (1/1) ... [2021-08-26 04:42:37,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:42:37" (1/1) ... [2021-08-26 04:42:37,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 04:42:37,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 04:42:37,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 04:42:37,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 04:42:37,133 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:42:37" (1/1) ... [2021-08-26 04:42:37,138 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 04:42:37,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:37,158 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 04:42:37,182 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 04:42:37,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 04:42:37,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 04:42:37,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 04:42:37,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 04:42:37,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 04:42:37,415 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-26 04:42:37,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:42:37 BoogieIcfgContainer [2021-08-26 04:42:37,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 04:42:37,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 04:42:37,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 04:42:37,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 04:42:37,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:42:36" (1/3) ... [2021-08-26 04:42:37,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393f1f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:42:37, skipping insertion in model container [2021-08-26 04:42:37,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:42:37" (2/3) ... [2021-08-26 04:42:37,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393f1f75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:42:37, skipping insertion in model container [2021-08-26 04:42:37,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:42:37" (3/3) ... [2021-08-26 04:42:37,428 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark23_conjunctive.i [2021-08-26 04:42:37,433 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 04:42:37,433 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 04:42:37,473 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 04:42:37,480 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 04:42:37,480 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 04:42:37,493 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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 04:42:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 04:42:37,496 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:37,496 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:37,497 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:37,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1807089479, now seen corresponding path program 1 times [2021-08-26 04:42:37,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:37,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437692051] [2021-08-26 04:42:37,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:37,507 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:37,654 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 04:42:37,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:37,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437692051] [2021-08-26 04:42:37,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437692051] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:42:37,655 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:42:37,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 04:42:37,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565517372] [2021-08-26 04:42:37,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 04:42:37,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:37,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 04:42:37,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 04:42:37,678 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 04:42:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:37,686 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-08-26 04:42:37,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 04:42:37,687 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2021-08-26 04:42:37,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:37,692 INFO L225 Difference]: With dead ends: 20 [2021-08-26 04:42:37,692 INFO L226 Difference]: Without dead ends: 8 [2021-08-26 04:42:37,694 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 04:42:37,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-08-26 04:42:37,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-08-26 04:42:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 04:42:37,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-08-26 04:42:37,718 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7 [2021-08-26 04:42:37,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:37,719 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-08-26 04:42:37,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 04:42:37,720 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-08-26 04:42:37,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 04:42:37,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:37,720 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:37,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 04:42:37,721 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:37,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1806970315, now seen corresponding path program 1 times [2021-08-26 04:42:37,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:37,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644345950] [2021-08-26 04:42:37,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:37,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:37,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:37,797 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 04:42:37,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:37,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644345950] [2021-08-26 04:42:37,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644345950] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:42:37,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:42:37,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 04:42:37,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079147399] [2021-08-26 04:42:37,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 04:42:37,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:37,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 04:42:37,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:42:37,800 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 04:42:37,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:37,809 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-08-26 04:42:37,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 04:42:37,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2021-08-26 04:42:37,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:37,810 INFO L225 Difference]: With dead ends: 13 [2021-08-26 04:42:37,810 INFO L226 Difference]: Without dead ends: 9 [2021-08-26 04:42:37,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:42:37,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-26 04:42:37,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-08-26 04:42:37,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 04:42:37,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-08-26 04:42:37,813 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-08-26 04:42:37,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:37,813 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-08-26 04:42:37,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 04:42:37,814 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-08-26 04:42:37,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 04:42:37,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:37,814 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:37,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 04:42:37,815 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:37,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:37,815 INFO L82 PathProgramCache]: Analyzing trace with hash 183170323, now seen corresponding path program 1 times [2021-08-26 04:42:37,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:37,816 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537480397] [2021-08-26 04:42:37,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:37,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:37,855 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 04:42:37,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:37,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537480397] [2021-08-26 04:42:37,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537480397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:37,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749463865] [2021-08-26 04:42:37,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:37,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:37,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:37,858 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 04:42:37,878 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 04:42:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:37,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 04:42:37,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:37,979 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 04:42:37,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749463865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:37,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:37,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-08-26 04:42:37,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713059522] [2021-08-26 04:42:37,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 04:42:37,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:37,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 04:42:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 04:42:37,982 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 04:42:37,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:37,994 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-08-26 04:42:37,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 04:42:37,995 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-08-26 04:42:37,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:37,996 INFO L225 Difference]: With dead ends: 14 [2021-08-26 04:42:37,996 INFO L226 Difference]: Without dead ends: 10 [2021-08-26 04:42:37,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 04:42:37,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-08-26 04:42:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-08-26 04:42:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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 04:42:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-08-26 04:42:37,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-08-26 04:42:38,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:38,004 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-08-26 04:42:38,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 04:42:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-08-26 04:42:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 04:42:38,007 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:38,007 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:38,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 04:42:38,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:38,228 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:38,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1384978123, now seen corresponding path program 2 times [2021-08-26 04:42:38,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:38,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578065202] [2021-08-26 04:42:38,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:38,229 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:38,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:38,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578065202] [2021-08-26 04:42:38,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578065202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:38,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879921544] [2021-08-26 04:42:38,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:42:38,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:38,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:38,285 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 04:42:38,293 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 04:42:38,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:42:38,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:38,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 04:42:38,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:38,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879921544] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:38,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:38,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-08-26 04:42:38,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569650967] [2021-08-26 04:42:38,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 04:42:38,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:38,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 04:42:38,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 04:42:38,438 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 04:42:38,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:38,463 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-08-26 04:42:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 04:42:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2021-08-26 04:42:38,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:38,464 INFO L225 Difference]: With dead ends: 15 [2021-08-26 04:42:38,464 INFO L226 Difference]: Without dead ends: 11 [2021-08-26 04:42:38,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 04:42:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-08-26 04:42:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-08-26 04:42:38,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 04:42:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-08-26 04:42:38,469 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-08-26 04:42:38,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:38,470 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-08-26 04:42:38,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 04:42:38,470 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-08-26 04:42:38,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 04:42:38,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:38,471 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:38,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-26 04:42:38,684 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,SelfDestructingSolverStorable3 [2021-08-26 04:42:38,685 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:38,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:38,685 INFO L82 PathProgramCache]: Analyzing trace with hash -13685741, now seen corresponding path program 3 times [2021-08-26 04:42:38,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:38,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878459193] [2021-08-26 04:42:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:38,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:38,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:38,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878459193] [2021-08-26 04:42:38,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878459193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:38,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991914468] [2021-08-26 04:42:38,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:42:38,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:38,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:38,754 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 04:42:38,756 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 04:42:38,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-26 04:42:38,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:38,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 04:42:38,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:38,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991914468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:38,875 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:38,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-08-26 04:42:38,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510179085] [2021-08-26 04:42:38,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 04:42:38,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:38,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 04:42:38,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-26 04:42:38,877 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 04:42:38,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:38,894 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-08-26 04:42:38,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 04:42:38,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 10 [2021-08-26 04:42:38,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:38,896 INFO L225 Difference]: With dead ends: 16 [2021-08-26 04:42:38,896 INFO L226 Difference]: Without dead ends: 12 [2021-08-26 04:42:38,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-26 04:42:38,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-26 04:42:38,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-08-26 04:42:38,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 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 04:42:38,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-08-26 04:42:38,898 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2021-08-26 04:42:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:38,898 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-08-26 04:42:38,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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 04:42:38,899 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-08-26 04:42:38,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 04:42:38,899 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:38,899 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:38,916 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 04:42:39,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:39,105 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:39,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:39,105 INFO L82 PathProgramCache]: Analyzing trace with hash -422592565, now seen corresponding path program 4 times [2021-08-26 04:42:39,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:39,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935266194] [2021-08-26 04:42:39,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:39,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:39,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:39,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:39,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935266194] [2021-08-26 04:42:39,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935266194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:39,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332413782] [2021-08-26 04:42:39,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:42:39,193 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:39,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:39,194 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 04:42:39,221 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 04:42:39,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:42:39,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:39,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-26 04:42:39,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:39,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332413782] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:39,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:39,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-08-26 04:42:39,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876021373] [2021-08-26 04:42:39,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 04:42:39,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:39,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 04:42:39,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-26 04:42:39,365 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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 04:42:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:39,384 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-08-26 04:42:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 04:42:39,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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 11 [2021-08-26 04:42:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:39,385 INFO L225 Difference]: With dead ends: 17 [2021-08-26 04:42:39,385 INFO L226 Difference]: Without dead ends: 13 [2021-08-26 04:42:39,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-26 04:42:39,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-08-26 04:42:39,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-08-26 04:42:39,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 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 04:42:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-08-26 04:42:39,387 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-08-26 04:42:39,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:39,387 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-08-26 04:42:39,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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 04:42:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-08-26 04:42:39,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 04:42:39,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:39,388 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:39,409 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 04:42:39,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:39,609 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:39,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:39,609 INFO L82 PathProgramCache]: Analyzing trace with hash -213802221, now seen corresponding path program 5 times [2021-08-26 04:42:39,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:39,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470760285] [2021-08-26 04:42:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:39,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:39,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:39,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470760285] [2021-08-26 04:42:39,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470760285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:39,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133085719] [2021-08-26 04:42:39,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:42:39,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:39,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:39,715 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 04:42:39,716 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 04:42:39,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-26 04:42:39,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:39,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 04:42:39,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:39,896 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:39,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133085719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:39,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:39,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-08-26 04:42:39,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117501192] [2021-08-26 04:42:39,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-26 04:42:39,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:39,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-26 04:42:39,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-26 04:42:39,901 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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 04:42:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:39,921 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-08-26 04:42:39,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 04:42:39,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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 04:42:39,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:39,923 INFO L225 Difference]: With dead ends: 18 [2021-08-26 04:42:39,923 INFO L226 Difference]: Without dead ends: 14 [2021-08-26 04:42:39,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-26 04:42:39,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-26 04:42:39,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-26 04:42:39,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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 04:42:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-08-26 04:42:39,929 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-08-26 04:42:39,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:39,929 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-08-26 04:42:39,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 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 04:42:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-08-26 04:42:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 04:42:39,930 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:39,930 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:39,949 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 04:42:40,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:40,138 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:40,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:40,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1963731147, now seen corresponding path program 6 times [2021-08-26 04:42:40,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:40,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279001989] [2021-08-26 04:42:40,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:40,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:40,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:40,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279001989] [2021-08-26 04:42:40,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279001989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:40,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583283437] [2021-08-26 04:42:40,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:42:40,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:40,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:40,198 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 04:42:40,199 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 04:42:40,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-26 04:42:40,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:40,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-26 04:42:40,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:40,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583283437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:40,298 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:40,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-08-26 04:42:40,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693525000] [2021-08-26 04:42:40,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-26 04:42:40,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:40,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-26 04:42:40,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 04:42:40,300 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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 04:42:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:40,313 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-08-26 04:42:40,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 04:42:40,313 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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 13 [2021-08-26 04:42:40,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:40,314 INFO L225 Difference]: With dead ends: 19 [2021-08-26 04:42:40,314 INFO L226 Difference]: Without dead ends: 15 [2021-08-26 04:42:40,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-26 04:42:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-26 04:42:40,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-26 04:42:40,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 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 04:42:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-08-26 04:42:40,316 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-08-26 04:42:40,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:40,316 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-08-26 04:42:40,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 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 04:42:40,319 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-08-26 04:42:40,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 04:42:40,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:40,320 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:40,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-26 04:42:40,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:40,529 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:40,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:40,529 INFO L82 PathProgramCache]: Analyzing trace with hash 747788819, now seen corresponding path program 7 times [2021-08-26 04:42:40,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:40,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728889793] [2021-08-26 04:42:40,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:40,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:40,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:40,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:40,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728889793] [2021-08-26 04:42:40,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728889793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:40,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707893365] [2021-08-26 04:42:40,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:42:40,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:40,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:40,622 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 04:42:40,640 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 04:42:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:40,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-26 04:42:40,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:40,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707893365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:40,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:40,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-08-26 04:42:40,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963350438] [2021-08-26 04:42:40,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-26 04:42:40,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:40,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-26 04:42:40,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-26 04:42:40,748 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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 04:42:40,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:40,762 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-08-26 04:42:40,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 04:42:40,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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 14 [2021-08-26 04:42:40,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:40,763 INFO L225 Difference]: With dead ends: 20 [2021-08-26 04:42:40,763 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 04:42:40,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-26 04:42:40,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 04:42:40,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-26 04:42:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 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 04:42:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-08-26 04:42:40,765 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-08-26 04:42:40,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:40,766 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-08-26 04:42:40,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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 04:42:40,766 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-08-26 04:42:40,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 04:42:40,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:40,766 INFO L512 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:40,783 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 04:42:40,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:40,973 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:40,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:40,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1708282315, now seen corresponding path program 8 times [2021-08-26 04:42:40,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:40,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883320395] [2021-08-26 04:42:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:40,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:41,079 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:41,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:41,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883320395] [2021-08-26 04:42:41,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883320395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:41,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056200785] [2021-08-26 04:42:41,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:42:41,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:41,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:41,080 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 04:42:41,081 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 04:42:41,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:42:41,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:41,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-26 04:42:41,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:41,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056200785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:41,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:41,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-08-26 04:42:41,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114159117] [2021-08-26 04:42:41,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 04:42:41,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:41,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 04:42:41,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-26 04:42:41,186 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 04:42:41,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:41,204 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-08-26 04:42:41,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 04:42:41,204 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 04:42:41,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:41,205 INFO L225 Difference]: With dead ends: 21 [2021-08-26 04:42:41,205 INFO L226 Difference]: Without dead ends: 17 [2021-08-26 04:42:41,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-26 04:42:41,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-26 04:42:41,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-26 04:42:41,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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 04:42:41,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-08-26 04:42:41,207 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-08-26 04:42:41,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:41,208 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-08-26 04:42:41,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 04:42:41,208 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-08-26 04:42:41,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-26 04:42:41,208 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:41,208 INFO L512 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:41,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-26 04:42:41,412 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,SelfDestructingSolverStorable9 [2021-08-26 04:42:41,413 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:41,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:41,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1418809619, now seen corresponding path program 9 times [2021-08-26 04:42:41,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:41,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494187479] [2021-08-26 04:42:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:41,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:41,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:41,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494187479] [2021-08-26 04:42:41,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494187479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:41,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940494603] [2021-08-26 04:42:41,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:42:41,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:41,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:41,492 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 04:42:41,492 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 04:42:41,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-26 04:42:41,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:41,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-26 04:42:41,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:41,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940494603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:41,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:41,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-08-26 04:42:41,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853957320] [2021-08-26 04:42:41,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-26 04:42:41,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:41,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-26 04:42:41,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-26 04:42:41,619 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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 04:42:41,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:41,641 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-08-26 04:42:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-26 04:42:41,642 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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 16 [2021-08-26 04:42:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:41,643 INFO L225 Difference]: With dead ends: 22 [2021-08-26 04:42:41,644 INFO L226 Difference]: Without dead ends: 18 [2021-08-26 04:42:41,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-26 04:42:41,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-26 04:42:41,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-26 04:42:41,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 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 04:42:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-08-26 04:42:41,649 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-08-26 04:42:41,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:41,649 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-08-26 04:42:41,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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 04:42:41,650 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-08-26 04:42:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 04:42:41,650 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:41,650 INFO L512 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:41,669 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 04:42:41,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:41,861 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:41,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1035090635, now seen corresponding path program 10 times [2021-08-26 04:42:41,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:41,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997020104] [2021-08-26 04:42:41,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:41,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:41,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:41,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997020104] [2021-08-26 04:42:41,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997020104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:41,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097698614] [2021-08-26 04:42:41,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:42:41,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:41,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:41,962 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 04:42:41,986 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 04:42:42,041 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:42:42,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:42,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 04:42:42,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:42,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097698614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:42,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:42,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-08-26 04:42:42,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063804435] [2021-08-26 04:42:42,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-26 04:42:42,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-26 04:42:42,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-26 04:42:42,092 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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 04:42:42,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:42,113 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-08-26 04:42:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 04:42:42,113 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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 17 [2021-08-26 04:42:42,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:42,114 INFO L225 Difference]: With dead ends: 23 [2021-08-26 04:42:42,114 INFO L226 Difference]: Without dead ends: 19 [2021-08-26 04:42:42,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-08-26 04:42:42,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-26 04:42:42,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-26 04:42:42,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 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 04:42:42,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-08-26 04:42:42,117 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-08-26 04:42:42,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:42,118 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-08-26 04:42:42,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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 04:42:42,118 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-08-26 04:42:42,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 04:42:42,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:42,118 INFO L512 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:42,138 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 04:42:42,338 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,SelfDestructingSolverStorable11 [2021-08-26 04:42:42,339 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:42,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:42,339 INFO L82 PathProgramCache]: Analyzing trace with hash 2024704019, now seen corresponding path program 11 times [2021-08-26 04:42:42,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:42,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196696627] [2021-08-26 04:42:42,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:42,339 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:42,454 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:42,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:42,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196696627] [2021-08-26 04:42:42,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196696627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:42,455 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253377835] [2021-08-26 04:42:42,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:42:42,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:42,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:42,456 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 04:42:42,459 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 04:42:42,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-26 04:42:42,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:42,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-26 04:42:42,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:42,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253377835] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:42,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:42,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-08-26 04:42:42,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256977916] [2021-08-26 04:42:42,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 04:42:42,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:42,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 04:42:42,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-26 04:42:42,609 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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 04:42:42,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:42,627 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-08-26 04:42:42,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-26 04:42:42,627 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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 18 [2021-08-26 04:42:42,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:42,627 INFO L225 Difference]: With dead ends: 24 [2021-08-26 04:42:42,628 INFO L226 Difference]: Without dead ends: 20 [2021-08-26 04:42:42,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-08-26 04:42:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-26 04:42:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-26 04:42:42,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 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 04:42:42,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-08-26 04:42:42,632 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2021-08-26 04:42:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:42,632 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-08-26 04:42:42,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 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 04:42:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-08-26 04:42:42,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 04:42:42,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:42,633 INFO L512 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:42,649 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 04:42:42,844 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,SelfDestructingSolverStorable12 [2021-08-26 04:42:42,845 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:42,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:42,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1657019445, now seen corresponding path program 12 times [2021-08-26 04:42:42,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:42,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004236575] [2021-08-26 04:42:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:42,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:42,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:42,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004236575] [2021-08-26 04:42:42,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004236575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:42,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125712976] [2021-08-26 04:42:42,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:42:42,966 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:42,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:42,969 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 04:42:42,985 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 04:42:43,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-26 04:42:43,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:43,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-26 04:42:43,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:43,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125712976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:43,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:43,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-08-26 04:42:43,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109768919] [2021-08-26 04:42:43,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 04:42:43,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:43,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 04:42:43,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-26 04:42:43,120 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 04:42:43,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:43,141 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-08-26 04:42:43,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-26 04:42:43,141 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 19 [2021-08-26 04:42:43,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:43,141 INFO L225 Difference]: With dead ends: 25 [2021-08-26 04:42:43,141 INFO L226 Difference]: Without dead ends: 21 [2021-08-26 04:42:43,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-08-26 04:42:43,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-26 04:42:43,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-26 04:42:43,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 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 04:42:43,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-08-26 04:42:43,144 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2021-08-26 04:42:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:43,144 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-08-26 04:42:43,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 04:42:43,144 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-08-26 04:42:43,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 04:42:43,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:43,144 INFO L512 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:43,161 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 04:42:43,361 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,SelfDestructingSolverStorable13 [2021-08-26 04:42:43,361 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:43,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:43,362 INFO L82 PathProgramCache]: Analyzing trace with hash 173670163, now seen corresponding path program 13 times [2021-08-26 04:42:43,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:43,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935654358] [2021-08-26 04:42:43,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:43,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:43,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:43,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935654358] [2021-08-26 04:42:43,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935654358] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:43,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647275062] [2021-08-26 04:42:43,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:42:43,487 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:43,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:43,489 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 04:42:43,521 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 04:42:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:43,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-26 04:42:43,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:43,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647275062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:43,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:43,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-08-26 04:42:43,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790684136] [2021-08-26 04:42:43,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-26 04:42:43,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:43,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-26 04:42:43,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-26 04:42:43,665 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 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 04:42:43,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:43,682 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-08-26 04:42:43,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-26 04:42:43,682 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 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 20 [2021-08-26 04:42:43,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:43,683 INFO L225 Difference]: With dead ends: 26 [2021-08-26 04:42:43,683 INFO L226 Difference]: Without dead ends: 22 [2021-08-26 04:42:43,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-08-26 04:42:43,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-26 04:42:43,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-26 04:42:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 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 04:42:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-08-26 04:42:43,686 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-08-26 04:42:43,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:43,687 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-08-26 04:42:43,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 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 04:42:43,687 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-08-26 04:42:43,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-26 04:42:43,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:43,687 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:43,705 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 04:42:43,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-26 04:42:43,888 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:43,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:43,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1090473163, now seen corresponding path program 14 times [2021-08-26 04:42:43,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:43,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224653363] [2021-08-26 04:42:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:43,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:44,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:44,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224653363] [2021-08-26 04:42:44,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224653363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:44,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710706484] [2021-08-26 04:42:44,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:42:44,030 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:44,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:44,031 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 04:42:44,032 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 04:42:44,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:42:44,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:44,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 04:42:44,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:44,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710706484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:44,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:44,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-08-26 04:42:44,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14704761] [2021-08-26 04:42:44,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 04:42:44,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:44,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 04:42:44,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-26 04:42:44,218 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 04:42:44,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:44,238 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-08-26 04:42:44,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-26 04:42:44,239 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 04:42:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:44,239 INFO L225 Difference]: With dead ends: 27 [2021-08-26 04:42:44,239 INFO L226 Difference]: Without dead ends: 23 [2021-08-26 04:42:44,239 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-08-26 04:42:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-26 04:42:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-08-26 04:42:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 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 04:42:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-08-26 04:42:44,241 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2021-08-26 04:42:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:44,241 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-08-26 04:42:44,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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 04:42:44,241 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-08-26 04:42:44,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 04:42:44,241 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:44,241 INFO L512 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:44,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-26 04:42:44,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:44,442 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:44,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:44,442 INFO L82 PathProgramCache]: Analyzing trace with hash -553404909, now seen corresponding path program 15 times [2021-08-26 04:42:44,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:44,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145106477] [2021-08-26 04:42:44,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:44,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:44,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:44,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145106477] [2021-08-26 04:42:44,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145106477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:44,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467049247] [2021-08-26 04:42:44,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:42:44,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:44,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:44,601 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 04:42:44,640 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 04:42:44,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-26 04:42:44,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:44,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-26 04:42:44,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:44,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467049247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:44,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:44,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-08-26 04:42:44,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716648655] [2021-08-26 04:42:44,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-26 04:42:44,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:44,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-26 04:42:44,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-26 04:42:44,791 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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 04:42:44,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:44,808 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-08-26 04:42:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-26 04:42:44,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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) Word has length 22 [2021-08-26 04:42:44,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:44,808 INFO L225 Difference]: With dead ends: 28 [2021-08-26 04:42:44,808 INFO L226 Difference]: Without dead ends: 24 [2021-08-26 04:42:44,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-08-26 04:42:44,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-26 04:42:44,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-26 04:42:44,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 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 04:42:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-08-26 04:42:44,811 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-08-26 04:42:44,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:44,811 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-08-26 04:42:44,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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 04:42:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-08-26 04:42:44,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-26 04:42:44,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:44,812 INFO L512 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:44,833 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 04:42:45,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-26 04:42:45,028 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:45,029 INFO L82 PathProgramCache]: Analyzing trace with hash 25982411, now seen corresponding path program 16 times [2021-08-26 04:42:45,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:45,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272428628] [2021-08-26 04:42:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:45,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:45,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:45,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272428628] [2021-08-26 04:42:45,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272428628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:45,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122596221] [2021-08-26 04:42:45,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:42:45,205 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:45,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:45,205 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 04:42:45,206 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 04:42:45,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:42:45,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:45,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-26 04:42:45,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:45,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122596221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:45,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:45,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-08-26 04:42:45,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130248588] [2021-08-26 04:42:45,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-26 04:42:45,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:45,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-26 04:42:45,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-26 04:42:45,419 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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 04:42:45,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:45,436 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-08-26 04:42:45,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-26 04:42:45,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) Word has length 23 [2021-08-26 04:42:45,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:45,437 INFO L225 Difference]: With dead ends: 29 [2021-08-26 04:42:45,437 INFO L226 Difference]: Without dead ends: 25 [2021-08-26 04:42:45,437 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-08-26 04:42:45,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-26 04:42:45,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-26 04:42:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 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 04:42:45,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-08-26 04:42:45,440 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2021-08-26 04:42:45,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:45,440 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-08-26 04:42:45,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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 04:42:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-08-26 04:42:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-26 04:42:45,440 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:45,440 INFO L512 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:45,460 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 04:42:45,656 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,SelfDestructingSolverStorable17 [2021-08-26 04:42:45,657 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:45,657 INFO L82 PathProgramCache]: Analyzing trace with hash 807120147, now seen corresponding path program 17 times [2021-08-26 04:42:45,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:45,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185261494] [2021-08-26 04:42:45,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:45,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:45,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:45,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185261494] [2021-08-26 04:42:45,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185261494] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:45,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28085931] [2021-08-26 04:42:45,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:42:45,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:45,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:45,855 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 04:42:45,857 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 04:42:45,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-26 04:42:45,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:45,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-26 04:42:45,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:46,074 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:46,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28085931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:46,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:46,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-08-26 04:42:46,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399033564] [2021-08-26 04:42:46,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-26 04:42:46,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:46,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-26 04:42:46,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-26 04:42:46,075 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 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 04:42:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:46,105 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-08-26 04:42:46,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-26 04:42:46,105 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 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) Word has length 24 [2021-08-26 04:42:46,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:46,105 INFO L225 Difference]: With dead ends: 30 [2021-08-26 04:42:46,105 INFO L226 Difference]: Without dead ends: 26 [2021-08-26 04:42:46,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-08-26 04:42:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-26 04:42:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-26 04:42:46,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 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 04:42:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-08-26 04:42:46,107 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2021-08-26 04:42:46,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:46,107 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-08-26 04:42:46,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 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 04:42:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-08-26 04:42:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 04:42:46,108 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:46,108 INFO L512 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:46,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-26 04:42:46,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:46,313 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:46,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:46,314 INFO L82 PathProgramCache]: Analyzing trace with hash -747413813, now seen corresponding path program 18 times [2021-08-26 04:42:46,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:46,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701111641] [2021-08-26 04:42:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:46,315 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:46,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:46,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701111641] [2021-08-26 04:42:46,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701111641] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:46,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235962026] [2021-08-26 04:42:46,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:42:46,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:46,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:46,536 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 04:42:46,538 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 04:42:46,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-26 04:42:46,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:46,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-26 04:42:46,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:46,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235962026] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:46,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:46,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-08-26 04:42:46,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302415521] [2021-08-26 04:42:46,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-26 04:42:46,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:46,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-26 04:42:46,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-08-26 04:42:46,767 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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 04:42:46,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:46,784 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-08-26 04:42:46,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-26 04:42:46,784 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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 25 [2021-08-26 04:42:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:46,785 INFO L225 Difference]: With dead ends: 31 [2021-08-26 04:42:46,785 INFO L226 Difference]: Without dead ends: 27 [2021-08-26 04:42:46,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-08-26 04:42:46,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-26 04:42:46,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-26 04:42:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 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 04:42:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-08-26 04:42:46,787 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-08-26 04:42:46,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:46,787 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-08-26 04:42:46,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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 04:42:46,788 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-08-26 04:42:46,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-26 04:42:46,788 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:46,788 INFO L512 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:46,811 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 04:42:47,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:47,011 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:47,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1693326317, now seen corresponding path program 19 times [2021-08-26 04:42:47,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:47,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062458274] [2021-08-26 04:42:47,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:47,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:47,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:47,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:47,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062458274] [2021-08-26 04:42:47,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062458274] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:47,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536379961] [2021-08-26 04:42:47,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:42:47,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:47,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:47,221 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 04:42:47,222 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 04:42:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:47,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-26 04:42:47,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:47,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536379961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:47,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:47,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-08-26 04:42:47,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276679435] [2021-08-26 04:42:47,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-26 04:42:47,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:47,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-26 04:42:47,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-26 04:42:47,436 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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 04:42:47,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:47,467 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-08-26 04:42:47,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-26 04:42:47,467 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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 26 [2021-08-26 04:42:47,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:47,467 INFO L225 Difference]: With dead ends: 32 [2021-08-26 04:42:47,467 INFO L226 Difference]: Without dead ends: 28 [2021-08-26 04:42:47,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-08-26 04:42:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-26 04:42:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-26 04:42:47,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 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 04:42:47,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-08-26 04:42:47,469 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2021-08-26 04:42:47,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:47,469 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-08-26 04:42:47,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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 04:42:47,469 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-08-26 04:42:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 04:42:47,470 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:47,470 INFO L512 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:47,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-26 04:42:47,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:47,673 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:47,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:47,673 INFO L82 PathProgramCache]: Analyzing trace with hash -951842869, now seen corresponding path program 20 times [2021-08-26 04:42:47,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:47,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812043057] [2021-08-26 04:42:47,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:47,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:47,897 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:47,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:47,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812043057] [2021-08-26 04:42:47,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812043057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:47,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521494395] [2021-08-26 04:42:47,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:42:47,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:47,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:47,908 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 04:42:47,909 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 04:42:48,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:42:48,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:48,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-26 04:42:48,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:48,147 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:48,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521494395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:48,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:48,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-08-26 04:42:48,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099258809] [2021-08-26 04:42:48,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-26 04:42:48,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:48,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-26 04:42:48,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-08-26 04:42:48,148 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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 04:42:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:48,171 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-08-26 04:42:48,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 04:42:48,172 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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 27 [2021-08-26 04:42:48,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:48,172 INFO L225 Difference]: With dead ends: 33 [2021-08-26 04:42:48,172 INFO L226 Difference]: Without dead ends: 29 [2021-08-26 04:42:48,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 174.4ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-08-26 04:42:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-26 04:42:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-26 04:42:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 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 04:42:48,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-08-26 04:42:48,188 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2021-08-26 04:42:48,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:48,188 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-08-26 04:42:48,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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 04:42:48,188 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-08-26 04:42:48,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 04:42:48,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:48,191 INFO L512 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:48,208 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 04:42:48,408 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,SelfDestructingSolverStorable21 [2021-08-26 04:42:48,408 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:48,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:48,408 INFO L82 PathProgramCache]: Analyzing trace with hash 559307539, now seen corresponding path program 21 times [2021-08-26 04:42:48,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:48,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288097890] [2021-08-26 04:42:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:48,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:48,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:48,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288097890] [2021-08-26 04:42:48,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288097890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:48,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375008034] [2021-08-26 04:42:48,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:42:48,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:48,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:48,635 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 04:42:48,637 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 04:42:48,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-26 04:42:48,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:48,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 04:42:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:48,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375008034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:48,898 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:48,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-08-26 04:42:48,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182296267] [2021-08-26 04:42:48,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-26 04:42:48,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:48,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-26 04:42:48,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-08-26 04:42:48,899 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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 04:42:48,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:48,919 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-08-26 04:42:48,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-26 04:42:48,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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 04:42:48,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:48,920 INFO L225 Difference]: With dead ends: 34 [2021-08-26 04:42:48,920 INFO L226 Difference]: Without dead ends: 30 [2021-08-26 04:42:48,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-08-26 04:42:48,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-26 04:42:48,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-26 04:42:48,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 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 04:42:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-08-26 04:42:48,922 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2021-08-26 04:42:48,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:48,922 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-08-26 04:42:48,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 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 04:42:48,922 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-08-26 04:42:48,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-26 04:42:48,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:48,923 INFO L512 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:48,940 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 04:42:49,124 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,SelfDestructingSolverStorable22 [2021-08-26 04:42:49,125 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:49,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:49,125 INFO L82 PathProgramCache]: Analyzing trace with hash 160329931, now seen corresponding path program 22 times [2021-08-26 04:42:49,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:49,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212146761] [2021-08-26 04:42:49,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:49,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:49,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:49,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212146761] [2021-08-26 04:42:49,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212146761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:49,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902926125] [2021-08-26 04:42:49,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:42:49,407 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:49,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:49,411 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 04:42:49,411 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 04:42:49,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:42:49,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:49,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 04:42:49,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:49,668 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:49,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902926125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:49,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:49,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-08-26 04:42:49,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404763728] [2021-08-26 04:42:49,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-26 04:42:49,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:49,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-26 04:42:49,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-08-26 04:42:49,670 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 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 04:42:49,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:49,689 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-08-26 04:42:49,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-26 04:42:49,690 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 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 29 [2021-08-26 04:42:49,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:49,690 INFO L225 Difference]: With dead ends: 35 [2021-08-26 04:42:49,690 INFO L226 Difference]: Without dead ends: 31 [2021-08-26 04:42:49,691 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-08-26 04:42:49,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-26 04:42:49,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-26 04:42:49,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 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 04:42:49,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-08-26 04:42:49,692 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-08-26 04:42:49,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:49,692 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-08-26 04:42:49,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 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 04:42:49,693 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-08-26 04:42:49,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 04:42:49,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:49,693 INFO L512 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:49,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-26 04:42:49,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:49,910 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:49,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:49,911 INFO L82 PathProgramCache]: Analyzing trace with hash 676925971, now seen corresponding path program 23 times [2021-08-26 04:42:49,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:49,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693067982] [2021-08-26 04:42:49,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:49,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:49,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:50,187 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:50,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:50,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693067982] [2021-08-26 04:42:50,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693067982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:50,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427165989] [2021-08-26 04:42:50,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:42:50,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:50,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:50,188 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 04:42:50,199 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 04:42:50,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-26 04:42:50,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:50,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-26 04:42:50,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:50,472 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:50,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427165989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:50,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:50,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-08-26 04:42:50,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523654478] [2021-08-26 04:42:50,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-26 04:42:50,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:50,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-26 04:42:50,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-08-26 04:42:50,475 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 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 04:42:50,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:50,497 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-08-26 04:42:50,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-26 04:42:50,497 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 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) Word has length 30 [2021-08-26 04:42:50,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:50,498 INFO L225 Difference]: With dead ends: 36 [2021-08-26 04:42:50,498 INFO L226 Difference]: Without dead ends: 32 [2021-08-26 04:42:50,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-08-26 04:42:50,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-26 04:42:50,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-08-26 04:42:50,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 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 04:42:50,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-08-26 04:42:50,500 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2021-08-26 04:42:50,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:50,500 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-08-26 04:42:50,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 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 04:42:50,500 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-08-26 04:42:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-26 04:42:50,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:50,501 INFO L512 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:50,520 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 04:42:50,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:50,721 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:50,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:50,721 INFO L82 PathProgramCache]: Analyzing trace with hash -488465973, now seen corresponding path program 24 times [2021-08-26 04:42:50,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:50,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081834130] [2021-08-26 04:42:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:50,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:51,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:51,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081834130] [2021-08-26 04:42:51,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081834130] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:51,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055396734] [2021-08-26 04:42:51,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:42:51,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:51,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:51,031 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 04:42:51,032 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 04:42:51,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-26 04:42:51,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:51,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 04:42:51,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:51,332 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:51,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055396734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:51,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:51,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-08-26 04:42:51,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745112629] [2021-08-26 04:42:51,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-26 04:42:51,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:51,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-26 04:42:51,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-08-26 04:42:51,333 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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 04:42:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:51,355 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-08-26 04:42:51,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-26 04:42:51,355 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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 04:42:51,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:51,356 INFO L225 Difference]: With dead ends: 37 [2021-08-26 04:42:51,356 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 04:42:51,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-08-26 04:42:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 04:42:51,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-26 04:42:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 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 04:42:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-08-26 04:42:51,358 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-08-26 04:42:51,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:51,358 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-08-26 04:42:51,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 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 04:42:51,358 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-08-26 04:42:51,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-26 04:42:51,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:51,359 INFO L512 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:51,378 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 04:42:51,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-26 04:42:51,578 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:51,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:51,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2039089427, now seen corresponding path program 25 times [2021-08-26 04:42:51,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:51,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879422517] [2021-08-26 04:42:51,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:51,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:51,884 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:51,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:51,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879422517] [2021-08-26 04:42:51,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879422517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:51,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244842280] [2021-08-26 04:42:51,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:42:51,885 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:51,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:51,886 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 04:42:51,886 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 04:42:52,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:52,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-26 04:42:52,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:52,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244842280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:52,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:52,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-08-26 04:42:52,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825146139] [2021-08-26 04:42:52,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-26 04:42:52,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:52,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-26 04:42:52,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-08-26 04:42:52,193 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 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 04:42:52,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:52,224 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-08-26 04:42:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-26 04:42:52,225 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 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 32 [2021-08-26 04:42:52,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:52,225 INFO L225 Difference]: With dead ends: 38 [2021-08-26 04:42:52,225 INFO L226 Difference]: Without dead ends: 34 [2021-08-26 04:42:52,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-08-26 04:42:52,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-26 04:42:52,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-26 04:42:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 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 04:42:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-08-26 04:42:52,227 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2021-08-26 04:42:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:52,227 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-08-26 04:42:52,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 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 04:42:52,227 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-08-26 04:42:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-26 04:42:52,228 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:52,228 INFO L512 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:52,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-26 04:42:52,433 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,SelfDestructingSolverStorable26 [2021-08-26 04:42:52,433 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:52,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1211071797, now seen corresponding path program 26 times [2021-08-26 04:42:52,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:52,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004736310] [2021-08-26 04:42:52,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:52,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:52,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:52,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004736310] [2021-08-26 04:42:52,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004736310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:52,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893578339] [2021-08-26 04:42:52,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:42:52,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:52,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:52,742 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 04:42:52,743 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 04:42:52,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:42:52,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:52,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-26 04:42:52,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:53,071 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:53,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893578339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:53,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:53,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-08-26 04:42:53,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455589056] [2021-08-26 04:42:53,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-26 04:42:53,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:53,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-26 04:42:53,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-08-26 04:42:53,074 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 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 04:42:53,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:53,096 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-08-26 04:42:53,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-26 04:42:53,097 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 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 33 [2021-08-26 04:42:53,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:53,097 INFO L225 Difference]: With dead ends: 39 [2021-08-26 04:42:53,097 INFO L226 Difference]: Without dead ends: 35 [2021-08-26 04:42:53,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-08-26 04:42:53,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-26 04:42:53,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-08-26 04:42:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 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 04:42:53,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-08-26 04:42:53,101 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2021-08-26 04:42:53,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:53,102 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-08-26 04:42:53,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 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 04:42:53,102 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-08-26 04:42:53,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-26 04:42:53,102 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:53,102 INFO L512 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:53,126 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 04:42:53,306 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,SelfDestructingSolverStorable27 [2021-08-26 04:42:53,307 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:53,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:53,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1113145363, now seen corresponding path program 27 times [2021-08-26 04:42:53,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:53,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601022693] [2021-08-26 04:42:53,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:53,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:53,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:53,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:53,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601022693] [2021-08-26 04:42:53,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601022693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:53,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323117397] [2021-08-26 04:42:53,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:42:53,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:53,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:53,653 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 04:42:53,676 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 04:42:53,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-08-26 04:42:53,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:53,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-26 04:42:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:53,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323117397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:53,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:53,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-08-26 04:42:53,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991972811] [2021-08-26 04:42:54,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-26 04:42:54,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:54,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-26 04:42:54,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-08-26 04:42:54,001 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 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 04:42:54,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:54,037 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-08-26 04:42:54,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-26 04:42:54,037 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 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 04:42:54,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:54,038 INFO L225 Difference]: With dead ends: 40 [2021-08-26 04:42:54,038 INFO L226 Difference]: Without dead ends: 36 [2021-08-26 04:42:54,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-08-26 04:42:54,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-26 04:42:54,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-26 04:42:54,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 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 04:42:54,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-08-26 04:42:54,039 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-08-26 04:42:54,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:54,040 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-08-26 04:42:54,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 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 04:42:54,040 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-08-26 04:42:54,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-26 04:42:54,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:54,040 INFO L512 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:54,060 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 04:42:54,257 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,SelfDestructingSolverStorable28 [2021-08-26 04:42:54,258 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:54,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:54,258 INFO L82 PathProgramCache]: Analyzing trace with hash 149433291, now seen corresponding path program 28 times [2021-08-26 04:42:54,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:54,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283941271] [2021-08-26 04:42:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:54,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:54,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:54,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283941271] [2021-08-26 04:42:54,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283941271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:54,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011867665] [2021-08-26 04:42:54,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:42:54,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:54,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:54,644 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 04:42:54,676 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 04:42:54,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:42:54,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:54,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-26 04:42:54,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:55,013 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:55,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011867665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:55,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:55,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-08-26 04:42:55,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148440472] [2021-08-26 04:42:55,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-26 04:42:55,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:55,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-26 04:42:55,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-08-26 04:42:55,015 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 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 04:42:55,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:55,041 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-08-26 04:42:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-26 04:42:55,041 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 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 35 [2021-08-26 04:42:55,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:55,042 INFO L225 Difference]: With dead ends: 41 [2021-08-26 04:42:55,042 INFO L226 Difference]: Without dead ends: 37 [2021-08-26 04:42:55,042 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-08-26 04:42:55,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-26 04:42:55,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-08-26 04:42:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 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 04:42:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-08-26 04:42:55,043 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2021-08-26 04:42:55,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:55,043 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-08-26 04:42:55,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 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 04:42:55,044 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-08-26 04:42:55,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-26 04:42:55,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:55,044 INFO L512 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:55,068 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 04:42:55,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:55,265 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:55,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:55,266 INFO L82 PathProgramCache]: Analyzing trace with hash 339130131, now seen corresponding path program 29 times [2021-08-26 04:42:55,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:55,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533292763] [2021-08-26 04:42:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:55,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:55,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:55,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533292763] [2021-08-26 04:42:55,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533292763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:55,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608210217] [2021-08-26 04:42:55,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:42:55,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:55,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:55,653 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 04:42:55,666 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 04:42:55,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-08-26 04:42:55,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:55,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-26 04:42:55,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:56,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608210217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:56,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:56,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-08-26 04:42:56,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989912814] [2021-08-26 04:42:56,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-26 04:42:56,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:56,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-26 04:42:56,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-08-26 04:42:56,061 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 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 04:42:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:56,087 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-08-26 04:42:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-26 04:42:56,088 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 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 36 [2021-08-26 04:42:56,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:56,088 INFO L225 Difference]: With dead ends: 42 [2021-08-26 04:42:56,088 INFO L226 Difference]: Without dead ends: 38 [2021-08-26 04:42:56,088 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 328.4ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-08-26 04:42:56,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-26 04:42:56,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-08-26 04:42:56,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 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 04:42:56,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-08-26 04:42:56,090 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2021-08-26 04:42:56,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:56,090 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-08-26 04:42:56,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 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 04:42:56,090 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-08-26 04:42:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-26 04:42:56,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:56,090 INFO L512 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:56,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-26 04:42:56,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:56,299 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:56,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:56,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1924764875, now seen corresponding path program 30 times [2021-08-26 04:42:56,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:56,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764943115] [2021-08-26 04:42:56,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:56,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:56,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:56,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:56,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764943115] [2021-08-26 04:42:56,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764943115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:56,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13496331] [2021-08-26 04:42:56,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:42:56,756 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:56,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:56,756 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 04:42:56,757 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 04:42:57,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-08-26 04:42:57,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:57,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-26 04:42:57,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:57,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13496331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:57,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:57,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-08-26 04:42:57,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170623558] [2021-08-26 04:42:57,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-26 04:42:57,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:57,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-26 04:42:57,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 04:42:57,168 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 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 04:42:57,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:57,193 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-08-26 04:42:57,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-26 04:42:57,193 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 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 04:42:57,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:57,193 INFO L225 Difference]: With dead ends: 43 [2021-08-26 04:42:57,193 INFO L226 Difference]: Without dead ends: 39 [2021-08-26 04:42:57,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 388.6ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-08-26 04:42:57,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-26 04:42:57,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-26 04:42:57,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 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 04:42:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-08-26 04:42:57,195 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2021-08-26 04:42:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:57,196 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-08-26 04:42:57,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 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 04:42:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-08-26 04:42:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-26 04:42:57,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:57,196 INFO L512 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:57,216 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 04:42:57,408 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,SelfDestructingSolverStorable31 [2021-08-26 04:42:57,408 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:57,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:57,408 INFO L82 PathProgramCache]: Analyzing trace with hash -460165613, now seen corresponding path program 31 times [2021-08-26 04:42:57,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:57,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256200485] [2021-08-26 04:42:57,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:57,409 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:57,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:57,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256200485] [2021-08-26 04:42:57,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256200485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:57,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618998054] [2021-08-26 04:42:57,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:42:57,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:57,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:57,841 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 04:42:57,884 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 04:42:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:58,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-26 04:42:58,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:58,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618998054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:58,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:58,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-08-26 04:42:58,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299255268] [2021-08-26 04:42:58,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-26 04:42:58,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:58,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-26 04:42:58,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 04:42:58,253 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 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 04:42:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:58,278 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-08-26 04:42:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-26 04:42:58,278 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 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 38 [2021-08-26 04:42:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:58,279 INFO L225 Difference]: With dead ends: 44 [2021-08-26 04:42:58,279 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 04:42:58,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 369.6ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 04:42:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 04:42:58,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-26 04:42:58,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 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 04:42:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-08-26 04:42:58,282 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2021-08-26 04:42:58,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:58,282 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-08-26 04:42:58,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 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 04:42:58,282 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-08-26 04:42:58,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-26 04:42:58,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:58,283 INFO L512 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:58,300 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 04:42:58,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:58,493 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:58,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1378566709, now seen corresponding path program 32 times [2021-08-26 04:42:58,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:58,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241209832] [2021-08-26 04:42:58,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:58,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:42:58,950 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:58,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:42:58,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241209832] [2021-08-26 04:42:58,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241209832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:58,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931957081] [2021-08-26 04:42:58,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:42:58,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:58,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:42:58,951 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 04:42:58,953 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 04:42:59,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:42:59,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:42:59,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-26 04:42:59,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:42:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:42:59,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931957081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:42:59,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:42:59,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-08-26 04:42:59,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456005914] [2021-08-26 04:42:59,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-26 04:42:59,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:42:59,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-26 04:42:59,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 04:42:59,369 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 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 04:42:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:42:59,403 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-08-26 04:42:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-26 04:42:59,404 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 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 39 [2021-08-26 04:42:59,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:42:59,404 INFO L225 Difference]: With dead ends: 45 [2021-08-26 04:42:59,404 INFO L226 Difference]: Without dead ends: 41 [2021-08-26 04:42:59,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 396.6ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-08-26 04:42:59,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-26 04:42:59,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-08-26 04:42:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 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 04:42:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-08-26 04:42:59,406 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2021-08-26 04:42:59,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:42:59,406 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-08-26 04:42:59,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 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 04:42:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-08-26 04:42:59,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-26 04:42:59,407 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:42:59,407 INFO L512 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:42:59,424 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 04:42:59,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:42:59,611 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:42:59,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:42:59,611 INFO L82 PathProgramCache]: Analyzing trace with hash 215770387, now seen corresponding path program 33 times [2021-08-26 04:42:59,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:42:59,612 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080526664] [2021-08-26 04:42:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:42:59,612 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:42:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:00,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:00,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080526664] [2021-08-26 04:43:00,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080526664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:00,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955159711] [2021-08-26 04:43:00,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:43:00,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:00,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:00,077 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 04:43:00,108 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 04:43:00,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-08-26 04:43:00,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:00,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-26 04:43:00,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:00,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955159711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:00,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:00,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-08-26 04:43:00,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17532112] [2021-08-26 04:43:00,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-26 04:43:00,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:00,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-26 04:43:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 04:43:00,584 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 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 04:43:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:00,618 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-08-26 04:43:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-26 04:43:00,619 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 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 04:43:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:00,619 INFO L225 Difference]: With dead ends: 46 [2021-08-26 04:43:00,619 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 04:43:00,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-08-26 04:43:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 04:43:00,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-08-26 04:43:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 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 04:43:00,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-08-26 04:43:00,621 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2021-08-26 04:43:00,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:00,621 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-08-26 04:43:00,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 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 04:43:00,621 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-08-26 04:43:00,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-26 04:43:00,621 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:00,621 INFO L512 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:00,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:00,836 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,SelfDestructingSolverStorable34 [2021-08-26 04:43:00,837 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:00,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:00,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1899387189, now seen corresponding path program 34 times [2021-08-26 04:43:00,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:00,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753724529] [2021-08-26 04:43:00,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:00,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:01,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:01,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753724529] [2021-08-26 04:43:01,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753724529] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:01,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144061514] [2021-08-26 04:43:01,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:43:01,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:01,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:01,350 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 04:43:01,350 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 04:43:01,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:43:01,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:01,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-26 04:43:01,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:01,787 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:01,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144061514] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:01,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:01,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2021-08-26 04:43:01,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353213866] [2021-08-26 04:43:01,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-26 04:43:01,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:01,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-26 04:43:01,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-08-26 04:43:01,789 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 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 04:43:01,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:01,818 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-08-26 04:43:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-26 04:43:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 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 41 [2021-08-26 04:43:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:01,820 INFO L225 Difference]: With dead ends: 47 [2021-08-26 04:43:01,820 INFO L226 Difference]: Without dead ends: 43 [2021-08-26 04:43:01,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 449.3ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-08-26 04:43:01,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-26 04:43:01,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-08-26 04:43:01,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 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 04:43:01,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-08-26 04:43:01,822 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2021-08-26 04:43:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:01,822 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-08-26 04:43:01,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 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 04:43:01,822 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-08-26 04:43:01,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-26 04:43:01,822 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:01,823 INFO L512 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:01,843 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 04:43:02,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-26 04:43:02,025 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:02,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1250204691, now seen corresponding path program 35 times [2021-08-26 04:43:02,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:02,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131107056] [2021-08-26 04:43:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:02,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:02,546 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:02,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:02,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131107056] [2021-08-26 04:43:02,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131107056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:02,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119571332] [2021-08-26 04:43:02,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:43:02,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:02,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:02,560 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 04:43:02,561 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 04:43:02,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-08-26 04:43:02,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:02,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-26 04:43:02,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:03,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119571332] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:03,045 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:03,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-08-26 04:43:03,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434363774] [2021-08-26 04:43:03,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-26 04:43:03,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:03,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-26 04:43:03,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-08-26 04:43:03,047 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 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 04:43:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:03,079 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-08-26 04:43:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-26 04:43:03,080 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 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) Word has length 42 [2021-08-26 04:43:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:03,080 INFO L225 Difference]: With dead ends: 48 [2021-08-26 04:43:03,080 INFO L226 Difference]: Without dead ends: 44 [2021-08-26 04:43:03,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 449.5ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-08-26 04:43:03,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-26 04:43:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-08-26 04:43:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 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 04:43:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-08-26 04:43:03,082 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2021-08-26 04:43:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:03,082 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-08-26 04:43:03,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 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 04:43:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-08-26 04:43:03,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-26 04:43:03,082 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:03,082 INFO L512 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:03,101 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 04:43:03,283 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,SelfDestructingSolverStorable36 [2021-08-26 04:43:03,283 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:03,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:03,283 INFO L82 PathProgramCache]: Analyzing trace with hash 103305163, now seen corresponding path program 36 times [2021-08-26 04:43:03,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:03,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743378723] [2021-08-26 04:43:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:03,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:03,830 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:03,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:03,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743378723] [2021-08-26 04:43:03,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743378723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:03,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079709707] [2021-08-26 04:43:03,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:43:03,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:03,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:03,832 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:03,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-26 04:43:04,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-08-26 04:43:04,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:04,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-26 04:43:04,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:04,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079709707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:04,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:04,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-08-26 04:43:04,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299409029] [2021-08-26 04:43:04,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-26 04:43:04,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:04,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-26 04:43:04,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 04:43:04,327 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 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 04:43:04,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:04,368 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-08-26 04:43:04,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-26 04:43:04,369 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 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 04:43:04,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:04,369 INFO L225 Difference]: With dead ends: 49 [2021-08-26 04:43:04,369 INFO L226 Difference]: Without dead ends: 45 [2021-08-26 04:43:04,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 481.2ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-08-26 04:43:04,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-26 04:43:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-08-26 04:43:04,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 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 04:43:04,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-08-26 04:43:04,371 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2021-08-26 04:43:04,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:04,371 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-08-26 04:43:04,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 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 04:43:04,371 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-08-26 04:43:04,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-26 04:43:04,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:04,372 INFO L512 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:04,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:04,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:04,577 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1090841837, now seen corresponding path program 37 times [2021-08-26 04:43:04,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:04,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026528968] [2021-08-26 04:43:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:04,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:05,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:05,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026528968] [2021-08-26 04:43:05,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026528968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:05,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531494863] [2021-08-26 04:43:05,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:43:05,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:05,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:05,156 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:05,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-26 04:43:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:05,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-26 04:43:05,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:05,652 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:05,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531494863] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:05,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:05,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-08-26 04:43:05,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113671750] [2021-08-26 04:43:05,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-26 04:43:05,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:05,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-26 04:43:05,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-08-26 04:43:05,654 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 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 04:43:05,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:05,686 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-08-26 04:43:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-26 04:43:05,686 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 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 44 [2021-08-26 04:43:05,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:05,687 INFO L225 Difference]: With dead ends: 50 [2021-08-26 04:43:05,687 INFO L226 Difference]: Without dead ends: 46 [2021-08-26 04:43:05,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 511.5ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-08-26 04:43:05,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-26 04:43:05,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-08-26 04:43:05,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 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 04:43:05,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-08-26 04:43:05,688 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2021-08-26 04:43:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:05,688 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-08-26 04:43:05,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 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 04:43:05,688 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-08-26 04:43:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-26 04:43:05,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:05,689 INFO L512 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:05,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:05,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-26 04:43:05,889 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:05,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:05,889 INFO L82 PathProgramCache]: Analyzing trace with hash 545306827, now seen corresponding path program 38 times [2021-08-26 04:43:05,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:05,890 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135593480] [2021-08-26 04:43:05,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:05,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:06,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:06,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135593480] [2021-08-26 04:43:06,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135593480] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:06,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208549635] [2021-08-26 04:43:06,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:43:06,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:06,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:06,492 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:06,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-26 04:43:06,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:43:06,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:06,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-26 04:43:06,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:07,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208549635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:07,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:07,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2021-08-26 04:43:07,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982407379] [2021-08-26 04:43:07,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-26 04:43:07,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:07,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-26 04:43:07,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-08-26 04:43:07,024 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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 04:43:07,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:07,056 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-08-26 04:43:07,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-26 04:43:07,057 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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 45 [2021-08-26 04:43:07,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:07,057 INFO L225 Difference]: With dead ends: 51 [2021-08-26 04:43:07,057 INFO L226 Difference]: Without dead ends: 47 [2021-08-26 04:43:07,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 524.8ms TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-08-26 04:43:07,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-26 04:43:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-08-26 04:43:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 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 04:43:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-08-26 04:43:07,058 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2021-08-26 04:43:07,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:07,059 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-08-26 04:43:07,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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 04:43:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-08-26 04:43:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-26 04:43:07,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:07,059 INFO L512 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:07,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:07,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-26 04:43:07,265 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:07,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:07,265 INFO L82 PathProgramCache]: Analyzing trace with hash -273692141, now seen corresponding path program 39 times [2021-08-26 04:43:07,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:07,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569430595] [2021-08-26 04:43:07,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:07,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:07,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:07,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569430595] [2021-08-26 04:43:07,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569430595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:07,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408923598] [2021-08-26 04:43:07,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:43:07,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:07,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:07,888 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:07,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-26 04:43:08,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-08-26 04:43:08,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:08,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-26 04:43:08,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:08,443 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:08,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408923598] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:08,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:08,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2021-08-26 04:43:08,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644125164] [2021-08-26 04:43:08,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-26 04:43:08,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:08,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-26 04:43:08,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 04:43:08,444 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 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 04:43:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:08,478 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-08-26 04:43:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-26 04:43:08,478 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 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 04:43:08,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:08,479 INFO L225 Difference]: With dead ends: 52 [2021-08-26 04:43:08,479 INFO L226 Difference]: Without dead ends: 48 [2021-08-26 04:43:08,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 545.5ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-08-26 04:43:08,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-26 04:43:08,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-08-26 04:43:08,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 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 04:43:08,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-08-26 04:43:08,480 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2021-08-26 04:43:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:08,481 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-08-26 04:43:08,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 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 04:43:08,481 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-08-26 04:43:08,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-26 04:43:08,481 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:08,481 INFO L512 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:08,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:08,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:08,689 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:08,693 INFO L82 PathProgramCache]: Analyzing trace with hash 107143627, now seen corresponding path program 40 times [2021-08-26 04:43:08,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:08,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5241052] [2021-08-26 04:43:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:08,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:09,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:09,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5241052] [2021-08-26 04:43:09,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5241052] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:09,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231989796] [2021-08-26 04:43:09,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:43:09,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:09,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:09,339 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:09,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-26 04:43:09,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:43:09,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:09,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-26 04:43:09,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:09,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231989796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:09,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:09,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2021-08-26 04:43:09,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887526861] [2021-08-26 04:43:09,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-26 04:43:09,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:09,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-26 04:43:09,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-08-26 04:43:09,909 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 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 04:43:09,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:09,943 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-08-26 04:43:09,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-26 04:43:09,943 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 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 47 [2021-08-26 04:43:09,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:09,943 INFO L225 Difference]: With dead ends: 53 [2021-08-26 04:43:09,944 INFO L226 Difference]: Without dead ends: 49 [2021-08-26 04:43:09,944 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 574.7ms TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-08-26 04:43:09,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-26 04:43:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-08-26 04:43:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 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 04:43:09,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-08-26 04:43:09,945 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2021-08-26 04:43:09,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:09,945 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-08-26 04:43:09,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 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 04:43:09,945 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-08-26 04:43:09,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-26 04:43:09,946 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:09,946 INFO L512 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:09,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:10,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-26 04:43:10,146 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:10,146 INFO L82 PathProgramCache]: Analyzing trace with hash -971849453, now seen corresponding path program 41 times [2021-08-26 04:43:10,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:10,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287413511] [2021-08-26 04:43:10,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:10,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:10,833 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:10,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:10,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287413511] [2021-08-26 04:43:10,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287413511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:10,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988808482] [2021-08-26 04:43:10,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:43:10,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:10,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:10,834 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:10,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-26 04:43:11,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-08-26 04:43:11,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:11,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-26 04:43:11,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:11,418 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:11,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988808482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:11,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:11,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2021-08-26 04:43:11,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661495684] [2021-08-26 04:43:11,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-26 04:43:11,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:11,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-26 04:43:11,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-08-26 04:43:11,419 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 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 04:43:11,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:11,450 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-08-26 04:43:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-26 04:43:11,450 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 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 48 [2021-08-26 04:43:11,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:11,451 INFO L225 Difference]: With dead ends: 54 [2021-08-26 04:43:11,451 INFO L226 Difference]: Without dead ends: 50 [2021-08-26 04:43:11,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 610.5ms TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-08-26 04:43:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-26 04:43:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-08-26 04:43:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 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 04:43:11,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-08-26 04:43:11,452 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2021-08-26 04:43:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:11,454 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-08-26 04:43:11,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 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 04:43:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-08-26 04:43:11,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-26 04:43:11,454 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:11,454 INFO L512 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:11,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:11,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:11,669 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:11,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:11,669 INFO L82 PathProgramCache]: Analyzing trace with hash -60896565, now seen corresponding path program 42 times [2021-08-26 04:43:11,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:11,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535040923] [2021-08-26 04:43:11,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:11,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:12,408 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:12,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:12,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535040923] [2021-08-26 04:43:12,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535040923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:12,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191457472] [2021-08-26 04:43:12,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:43:12,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:12,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:12,409 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:12,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-26 04:43:12,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-08-26 04:43:12,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:12,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-26 04:43:12,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:13,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191457472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:13,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:13,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2021-08-26 04:43:13,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749900905] [2021-08-26 04:43:13,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-26 04:43:13,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:13,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-26 04:43:13,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-08-26 04:43:13,033 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 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 04:43:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:13,066 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-08-26 04:43:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-26 04:43:13,066 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 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 49 [2021-08-26 04:43:13,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:13,067 INFO L225 Difference]: With dead ends: 55 [2021-08-26 04:43:13,067 INFO L226 Difference]: Without dead ends: 51 [2021-08-26 04:43:13,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-08-26 04:43:13,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-26 04:43:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-08-26 04:43:13,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 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 04:43:13,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-08-26 04:43:13,068 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2021-08-26 04:43:13,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:13,069 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-08-26 04:43:13,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 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 04:43:13,069 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-08-26 04:43:13,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-26 04:43:13,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:13,069 INFO L512 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:13,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:13,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:13,277 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:13,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:13,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1886128109, now seen corresponding path program 43 times [2021-08-26 04:43:13,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:13,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489229688] [2021-08-26 04:43:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:13,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:14,027 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:14,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:14,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489229688] [2021-08-26 04:43:14,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489229688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:14,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839003044] [2021-08-26 04:43:14,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:43:14,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:14,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:14,028 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:14,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-26 04:43:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:14,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-26 04:43:14,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:14,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839003044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:14,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:14,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-08-26 04:43:14,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509432566] [2021-08-26 04:43:14,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-26 04:43:14,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:14,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-26 04:43:14,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-08-26 04:43:14,629 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 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 04:43:14,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:14,669 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-08-26 04:43:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-26 04:43:14,670 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 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) Word has length 50 [2021-08-26 04:43:14,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:14,670 INFO L225 Difference]: With dead ends: 56 [2021-08-26 04:43:14,670 INFO L226 Difference]: Without dead ends: 52 [2021-08-26 04:43:14,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 671.7ms TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-08-26 04:43:14,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-26 04:43:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-08-26 04:43:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 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 04:43:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-08-26 04:43:14,672 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2021-08-26 04:43:14,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:14,672 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-08-26 04:43:14,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 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 04:43:14,672 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-08-26 04:43:14,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-26 04:43:14,672 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:14,673 INFO L512 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:14,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:14,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-08-26 04:43:14,885 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:14,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:14,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1661236171, now seen corresponding path program 44 times [2021-08-26 04:43:14,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:14,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779118983] [2021-08-26 04:43:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:14,885 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:15,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:15,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779118983] [2021-08-26 04:43:15,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779118983] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:15,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879192155] [2021-08-26 04:43:15,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:43:15,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:15,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:15,710 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:15,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-26 04:43:16,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:43:16,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:16,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-26 04:43:16,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:16,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879192155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:16,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:16,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2021-08-26 04:43:16,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614600494] [2021-08-26 04:43:16,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-26 04:43:16,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:16,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-26 04:43:16,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-08-26 04:43:16,428 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 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 04:43:16,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:16,464 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-08-26 04:43:16,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-26 04:43:16,464 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 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 51 [2021-08-26 04:43:16,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:16,465 INFO L225 Difference]: With dead ends: 57 [2021-08-26 04:43:16,465 INFO L226 Difference]: Without dead ends: 53 [2021-08-26 04:43:16,465 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 742.5ms TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-08-26 04:43:16,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-26 04:43:16,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-08-26 04:43:16,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 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 04:43:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-08-26 04:43:16,466 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2021-08-26 04:43:16,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:16,466 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-08-26 04:43:16,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 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 04:43:16,466 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-08-26 04:43:16,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-26 04:43:16,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:16,467 INFO L512 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:16,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:16,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-26 04:43:16,673 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:16,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:16,673 INFO L82 PathProgramCache]: Analyzing trace with hash -39620845, now seen corresponding path program 45 times [2021-08-26 04:43:16,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:16,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047987058] [2021-08-26 04:43:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:16,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:17,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:17,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047987058] [2021-08-26 04:43:17,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047987058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:17,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546673293] [2021-08-26 04:43:17,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:43:17,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:17,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:17,540 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:17,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-26 04:43:18,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-08-26 04:43:18,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:18,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-26 04:43:18,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:18,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:18,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546673293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:18,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:18,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-08-26 04:43:18,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863237277] [2021-08-26 04:43:18,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-26 04:43:18,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:18,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-26 04:43:18,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-08-26 04:43:18,215 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 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 04:43:18,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:18,263 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-08-26 04:43:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-26 04:43:18,263 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 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 52 [2021-08-26 04:43:18,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:18,264 INFO L225 Difference]: With dead ends: 58 [2021-08-26 04:43:18,264 INFO L226 Difference]: Without dead ends: 54 [2021-08-26 04:43:18,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 781.7ms TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-08-26 04:43:18,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-26 04:43:18,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-26 04:43:18,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 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 04:43:18,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-08-26 04:43:18,265 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2021-08-26 04:43:18,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:18,265 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-08-26 04:43:18,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 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 04:43:18,265 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-08-26 04:43:18,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-26 04:43:18,265 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:18,265 INFO L512 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:18,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:18,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-26 04:43:18,473 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:18,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:18,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1226580789, now seen corresponding path program 46 times [2021-08-26 04:43:18,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:18,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825404304] [2021-08-26 04:43:18,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:18,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:18,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:19,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:19,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:19,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825404304] [2021-08-26 04:43:19,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825404304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:19,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904704705] [2021-08-26 04:43:19,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:43:19,286 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:19,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:19,287 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:19,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-26 04:43:19,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:43:19,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:19,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-26 04:43:19,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:19,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904704705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:19,967 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:19,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2021-08-26 04:43:19,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673392470] [2021-08-26 04:43:19,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-26 04:43:19,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:19,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-26 04:43:19,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-08-26 04:43:19,968 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 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 04:43:20,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:20,010 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-08-26 04:43:20,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-26 04:43:20,011 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 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 53 [2021-08-26 04:43:20,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:20,011 INFO L225 Difference]: With dead ends: 59 [2021-08-26 04:43:20,011 INFO L226 Difference]: Without dead ends: 55 [2021-08-26 04:43:20,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 735.0ms TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-08-26 04:43:20,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-26 04:43:20,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-08-26 04:43:20,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 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 04:43:20,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-08-26 04:43:20,017 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2021-08-26 04:43:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:20,017 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-08-26 04:43:20,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 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 04:43:20,017 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-08-26 04:43:20,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-26 04:43:20,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:20,018 INFO L512 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:20,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-26 04:43:20,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:20,225 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:20,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:20,225 INFO L82 PathProgramCache]: Analyzing trace with hash 632366611, now seen corresponding path program 47 times [2021-08-26 04:43:20,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:20,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652134162] [2021-08-26 04:43:20,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:20,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:21,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:21,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652134162] [2021-08-26 04:43:21,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652134162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:21,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054043685] [2021-08-26 04:43:21,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:43:21,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:21,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:21,106 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:21,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-26 04:43:21,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-08-26 04:43:21,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:21,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 49 conjunts are in the unsatisfiable core [2021-08-26 04:43:21,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:21,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054043685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:21,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:21,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2021-08-26 04:43:21,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174608758] [2021-08-26 04:43:21,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-26 04:43:21,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:21,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-26 04:43:21,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-08-26 04:43:21,807 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 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 04:43:21,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:21,842 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-08-26 04:43:21,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-26 04:43:21,842 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 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 54 [2021-08-26 04:43:21,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:21,842 INFO L225 Difference]: With dead ends: 60 [2021-08-26 04:43:21,842 INFO L226 Difference]: Without dead ends: 56 [2021-08-26 04:43:21,843 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 797.9ms TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-08-26 04:43:21,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-26 04:43:21,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-08-26 04:43:21,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 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 04:43:21,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-08-26 04:43:21,844 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2021-08-26 04:43:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:21,844 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-08-26 04:43:21,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 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 04:43:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-08-26 04:43:21,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-26 04:43:21,844 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:21,844 INFO L512 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:21,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:22,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-26 04:43:22,045 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:22,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:22,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1869806133, now seen corresponding path program 48 times [2021-08-26 04:43:22,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:22,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163810455] [2021-08-26 04:43:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:22,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:22,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:22,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163810455] [2021-08-26 04:43:22,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163810455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:22,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628474439] [2021-08-26 04:43:22,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:43:22,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:22,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:22,940 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:22,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-26 04:43:23,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-08-26 04:43:23,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:23,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-26 04:43:23,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:23,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628474439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:23,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:23,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2021-08-26 04:43:23,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244861882] [2021-08-26 04:43:23,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-26 04:43:23,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:23,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-26 04:43:23,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-08-26 04:43:23,664 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 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 04:43:23,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:23,710 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-08-26 04:43:23,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-26 04:43:23,711 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 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 55 [2021-08-26 04:43:23,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:23,711 INFO L225 Difference]: With dead ends: 61 [2021-08-26 04:43:23,711 INFO L226 Difference]: Without dead ends: 57 [2021-08-26 04:43:23,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 806.8ms TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-08-26 04:43:23,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-26 04:43:23,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-08-26 04:43:23,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 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 04:43:23,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-08-26 04:43:23,712 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2021-08-26 04:43:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:23,713 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-08-26 04:43:23,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 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 04:43:23,713 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-08-26 04:43:23,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-26 04:43:23,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:23,713 INFO L512 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:23,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:23,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-26 04:43:23,929 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:23,929 INFO L82 PathProgramCache]: Analyzing trace with hash -2127749869, now seen corresponding path program 49 times [2021-08-26 04:43:23,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:23,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871715190] [2021-08-26 04:43:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:23,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:24,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:24,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871715190] [2021-08-26 04:43:24,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871715190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:24,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226174063] [2021-08-26 04:43:24,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:43:24,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:24,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:24,893 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:24,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-26 04:43:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:25,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 51 conjunts are in the unsatisfiable core [2021-08-26 04:43:25,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:25,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226174063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:25,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:25,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-08-26 04:43:25,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685546651] [2021-08-26 04:43:25,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-26 04:43:25,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:25,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-26 04:43:25,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-08-26 04:43:25,628 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 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 04:43:25,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:25,668 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-08-26 04:43:25,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-26 04:43:25,669 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 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 56 [2021-08-26 04:43:25,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:25,669 INFO L225 Difference]: With dead ends: 62 [2021-08-26 04:43:25,669 INFO L226 Difference]: Without dead ends: 58 [2021-08-26 04:43:25,670 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 874.0ms TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-08-26 04:43:25,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-26 04:43:25,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-08-26 04:43:25,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 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 04:43:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-08-26 04:43:25,671 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2021-08-26 04:43:25,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:25,671 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-08-26 04:43:25,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 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 04:43:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-08-26 04:43:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-26 04:43:25,671 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:25,671 INFO L512 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:25,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-26 04:43:25,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:25,872 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:25,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:25,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1534071093, now seen corresponding path program 50 times [2021-08-26 04:43:25,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:25,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285650957] [2021-08-26 04:43:25,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:25,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:26,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:26,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285650957] [2021-08-26 04:43:26,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285650957] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:26,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952342849] [2021-08-26 04:43:26,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:43:26,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:26,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:26,846 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:26,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-26 04:43:27,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:43:27,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:27,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-26 04:43:27,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:27,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:27,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952342849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:27,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:27,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2021-08-26 04:43:27,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280573661] [2021-08-26 04:43:27,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-26 04:43:27,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:27,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-26 04:43:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-08-26 04:43:27,619 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 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 04:43:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:27,661 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-08-26 04:43:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-26 04:43:27,661 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 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 57 [2021-08-26 04:43:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:27,661 INFO L225 Difference]: With dead ends: 63 [2021-08-26 04:43:27,661 INFO L226 Difference]: Without dead ends: 59 [2021-08-26 04:43:27,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 885.3ms TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-08-26 04:43:27,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-26 04:43:27,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-26 04:43:27,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 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 04:43:27,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-08-26 04:43:27,663 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2021-08-26 04:43:27,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:27,663 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-08-26 04:43:27,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 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 04:43:27,663 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-08-26 04:43:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-26 04:43:27,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:27,663 INFO L512 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:27,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-26 04:43:27,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-26 04:43:27,877 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:27,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:27,877 INFO L82 PathProgramCache]: Analyzing trace with hash -309898221, now seen corresponding path program 51 times [2021-08-26 04:43:27,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:27,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287283033] [2021-08-26 04:43:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:27,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:28,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:28,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287283033] [2021-08-26 04:43:28,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287283033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:28,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401039996] [2021-08-26 04:43:28,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:43:28,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:28,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:28,921 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:28,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-26 04:43:29,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-08-26 04:43:29,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:29,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 53 conjunts are in the unsatisfiable core [2021-08-26 04:43:29,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:29,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401039996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:29,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:29,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2021-08-26 04:43:29,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133027287] [2021-08-26 04:43:29,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-26 04:43:29,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:29,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-26 04:43:29,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-08-26 04:43:29,745 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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 04:43:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:29,796 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-08-26 04:43:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-26 04:43:29,796 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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 58 [2021-08-26 04:43:29,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:29,797 INFO L225 Difference]: With dead ends: 64 [2021-08-26 04:43:29,797 INFO L226 Difference]: Without dead ends: 60 [2021-08-26 04:43:29,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 941.4ms TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-08-26 04:43:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-26 04:43:29,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-26 04:43:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 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 04:43:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-08-26 04:43:29,798 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2021-08-26 04:43:29,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:29,798 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-08-26 04:43:29,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 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 04:43:29,799 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-08-26 04:43:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-26 04:43:29,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:29,799 INFO L512 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:29,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-26 04:43:30,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:30,005 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:30,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:30,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1015244853, now seen corresponding path program 52 times [2021-08-26 04:43:30,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:30,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937152499] [2021-08-26 04:43:30,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:30,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:31,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:31,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937152499] [2021-08-26 04:43:31,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937152499] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:31,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239029988] [2021-08-26 04:43:31,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:43:31,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:31,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:31,116 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:31,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-26 04:43:31,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:43:31,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:31,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-26 04:43:31,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:31,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239029988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:31,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:31,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2021-08-26 04:43:31,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540507826] [2021-08-26 04:43:31,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-26 04:43:31,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:31,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-26 04:43:31,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-08-26 04:43:31,966 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 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 04:43:32,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:32,008 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-08-26 04:43:32,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-26 04:43:32,009 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 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 59 [2021-08-26 04:43:32,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:32,009 INFO L225 Difference]: With dead ends: 65 [2021-08-26 04:43:32,009 INFO L226 Difference]: Without dead ends: 61 [2021-08-26 04:43:32,010 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1010.3ms TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-08-26 04:43:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-26 04:43:32,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-08-26 04:43:32,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 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 04:43:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-08-26 04:43:32,011 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2021-08-26 04:43:32,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:32,011 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-08-26 04:43:32,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 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 04:43:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-08-26 04:43:32,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-26 04:43:32,012 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:32,012 INFO L512 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:32,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:32,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-26 04:43:32,231 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:32,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1406153965, now seen corresponding path program 53 times [2021-08-26 04:43:32,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:32,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556443826] [2021-08-26 04:43:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:32,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:33,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:33,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:33,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556443826] [2021-08-26 04:43:33,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556443826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:33,316 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875923352] [2021-08-26 04:43:33,316 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:43:33,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:33,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:33,317 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:33,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-26 04:43:33,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-08-26 04:43:33,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:33,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 55 conjunts are in the unsatisfiable core [2021-08-26 04:43:33,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:34,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875923352] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:34,148 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:34,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-08-26 04:43:34,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965551981] [2021-08-26 04:43:34,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-26 04:43:34,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:34,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-26 04:43:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-08-26 04:43:34,149 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 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 04:43:34,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:34,202 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-08-26 04:43:34,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-26 04:43:34,203 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 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 60 [2021-08-26 04:43:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:34,203 INFO L225 Difference]: With dead ends: 66 [2021-08-26 04:43:34,203 INFO L226 Difference]: Without dead ends: 62 [2021-08-26 04:43:34,203 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 988.3ms TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-08-26 04:43:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-26 04:43:34,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-08-26 04:43:34,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 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 04:43:34,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-08-26 04:43:34,204 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2021-08-26 04:43:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:34,205 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-08-26 04:43:34,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 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 04:43:34,205 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-08-26 04:43:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-26 04:43:34,205 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:34,205 INFO L512 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:34,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-26 04:43:34,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-26 04:43:34,419 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:34,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:34,420 INFO L82 PathProgramCache]: Analyzing trace with hash -639434549, now seen corresponding path program 54 times [2021-08-26 04:43:34,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:34,420 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96618606] [2021-08-26 04:43:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:34,420 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:35,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:35,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:35,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96618606] [2021-08-26 04:43:35,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96618606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:35,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082572209] [2021-08-26 04:43:35,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:43:35,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:35,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:35,518 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:35,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-26 04:43:36,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-08-26 04:43:36,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:36,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-26 04:43:36,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:36,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082572209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:36,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:36,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2021-08-26 04:43:36,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204189474] [2021-08-26 04:43:36,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-26 04:43:36,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:36,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-26 04:43:36,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-08-26 04:43:36,386 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 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 04:43:36,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:36,432 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-08-26 04:43:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-26 04:43:36,432 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 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 61 [2021-08-26 04:43:36,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:36,432 INFO L225 Difference]: With dead ends: 67 [2021-08-26 04:43:36,432 INFO L226 Difference]: Without dead ends: 63 [2021-08-26 04:43:36,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 992.2ms TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-08-26 04:43:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-26 04:43:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-08-26 04:43:36,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 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 04:43:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-08-26 04:43:36,434 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2021-08-26 04:43:36,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:36,435 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-08-26 04:43:36,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 states have internal predecessors, (61), 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 04:43:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-08-26 04:43:36,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-26 04:43:36,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:36,435 INFO L512 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:36,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-26 04:43:36,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:36,636 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:36,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1654030867, now seen corresponding path program 55 times [2021-08-26 04:43:36,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:36,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380579999] [2021-08-26 04:43:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:36,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:37,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:37,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380579999] [2021-08-26 04:43:37,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380579999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:37,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796809636] [2021-08-26 04:43:37,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:43:37,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:37,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:37,806 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:37,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-26 04:43:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:38,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-26 04:43:38,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:38,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796809636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:38,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:38,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-08-26 04:43:38,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042786910] [2021-08-26 04:43:38,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-08-26 04:43:38,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:38,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-26 04:43:38,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-08-26 04:43:38,692 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 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 04:43:38,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:38,746 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-08-26 04:43:38,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-26 04:43:38,747 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 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 62 [2021-08-26 04:43:38,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:38,747 INFO L225 Difference]: With dead ends: 68 [2021-08-26 04:43:38,747 INFO L226 Difference]: Without dead ends: 64 [2021-08-26 04:43:38,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1055.0ms TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-08-26 04:43:38,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-26 04:43:38,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-08-26 04:43:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 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 04:43:38,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-08-26 04:43:38,749 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2021-08-26 04:43:38,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:38,749 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-08-26 04:43:38,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 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 04:43:38,749 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-08-26 04:43:38,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-26 04:43:38,749 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:38,749 INFO L512 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:38,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:38,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:38,950 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:38,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:38,950 INFO L82 PathProgramCache]: Analyzing trace with hash -262985269, now seen corresponding path program 56 times [2021-08-26 04:43:38,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:38,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460774974] [2021-08-26 04:43:38,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:38,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:40,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:40,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460774974] [2021-08-26 04:43:40,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460774974] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:40,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543702347] [2021-08-26 04:43:40,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:43:40,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:40,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:40,161 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:40,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-26 04:43:40,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:43:40,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:40,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-26 04:43:40,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:41,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543702347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:41,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:41,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2021-08-26 04:43:41,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960090004] [2021-08-26 04:43:41,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-26 04:43:41,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:41,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-26 04:43:41,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-08-26 04:43:41,091 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 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 04:43:41,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:41,137 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-08-26 04:43:41,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-26 04:43:41,138 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 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 63 [2021-08-26 04:43:41,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:41,138 INFO L225 Difference]: With dead ends: 69 [2021-08-26 04:43:41,138 INFO L226 Difference]: Without dead ends: 65 [2021-08-26 04:43:41,138 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1112.4ms TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-08-26 04:43:41,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-26 04:43:41,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-08-26 04:43:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 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 04:43:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-08-26 04:43:41,140 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2021-08-26 04:43:41,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:41,140 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-08-26 04:43:41,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 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 04:43:41,140 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-08-26 04:43:41,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-26 04:43:41,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:41,140 INFO L512 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:41,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:41,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:41,353 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash 439056659, now seen corresponding path program 57 times [2021-08-26 04:43:41,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:41,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140048190] [2021-08-26 04:43:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:41,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:42,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:42,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140048190] [2021-08-26 04:43:42,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140048190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:42,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732943414] [2021-08-26 04:43:42,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:43:42,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:42,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:42,568 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:42,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-26 04:43:43,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-08-26 04:43:43,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:43,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 59 conjunts are in the unsatisfiable core [2021-08-26 04:43:43,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:43,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732943414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:43,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:43,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-08-26 04:43:43,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054549919] [2021-08-26 04:43:43,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-26 04:43:43,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:43,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-26 04:43:43,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-08-26 04:43:43,524 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 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 04:43:43,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:43,577 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-08-26 04:43:43,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-26 04:43:43,577 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 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 64 [2021-08-26 04:43:43,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:43,577 INFO L225 Difference]: With dead ends: 70 [2021-08-26 04:43:43,577 INFO L226 Difference]: Without dead ends: 66 [2021-08-26 04:43:43,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1118.0ms TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-08-26 04:43:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-26 04:43:43,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-08-26 04:43:43,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 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 04:43:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-08-26 04:43:43,579 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2021-08-26 04:43:43,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:43,579 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-08-26 04:43:43,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 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 04:43:43,580 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-08-26 04:43:43,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-26 04:43:43,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:43,580 INFO L512 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:43,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:43,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-08-26 04:43:43,780 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:43,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:43,781 INFO L82 PathProgramCache]: Analyzing trace with hash 727519947, now seen corresponding path program 58 times [2021-08-26 04:43:43,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:43,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857065183] [2021-08-26 04:43:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:43,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:45,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:45,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857065183] [2021-08-26 04:43:45,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857065183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:45,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192227625] [2021-08-26 04:43:45,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:43:45,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:45,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:45,088 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:45,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-26 04:43:45,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:43:45,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:45,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-26 04:43:45,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:46,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192227625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:46,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:46,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2021-08-26 04:43:46,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002778730] [2021-08-26 04:43:46,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-26 04:43:46,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:46,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-26 04:43:46,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-08-26 04:43:46,072 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 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 04:43:46,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:46,116 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-08-26 04:43:46,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-26 04:43:46,116 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 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 65 [2021-08-26 04:43:46,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:46,116 INFO L225 Difference]: With dead ends: 71 [2021-08-26 04:43:46,117 INFO L226 Difference]: Without dead ends: 67 [2021-08-26 04:43:46,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1193.8ms TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-08-26 04:43:46,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-26 04:43:46,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-08-26 04:43:46,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 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 04:43:46,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-08-26 04:43:46,118 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2021-08-26 04:43:46,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:46,118 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-08-26 04:43:46,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 states have internal predecessors, (65), 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 04:43:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-08-26 04:43:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-26 04:43:46,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:46,119 INFO L512 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:46,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-26 04:43:46,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-26 04:43:46,333 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:46,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:46,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1079947283, now seen corresponding path program 59 times [2021-08-26 04:43:46,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:46,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983134899] [2021-08-26 04:43:46,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:46,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:47,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:47,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983134899] [2021-08-26 04:43:47,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983134899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:47,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106240427] [2021-08-26 04:43:47,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:43:47,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:47,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:47,643 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:47,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-26 04:43:48,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-08-26 04:43:48,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:48,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-26 04:43:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:48,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106240427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:48,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:48,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2021-08-26 04:43:48,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731648607] [2021-08-26 04:43:48,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-26 04:43:48,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:48,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-26 04:43:48,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-08-26 04:43:48,651 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 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 04:43:48,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:48,696 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-08-26 04:43:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-26 04:43:48,696 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 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 66 [2021-08-26 04:43:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:48,697 INFO L225 Difference]: With dead ends: 72 [2021-08-26 04:43:48,697 INFO L226 Difference]: Without dead ends: 68 [2021-08-26 04:43:48,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1204.0ms TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-08-26 04:43:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-26 04:43:48,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-08-26 04:43:48,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 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 04:43:48,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-08-26 04:43:48,698 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2021-08-26 04:43:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:48,699 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-08-26 04:43:48,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 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 04:43:48,699 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-08-26 04:43:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-26 04:43:48,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:48,699 INFO L512 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:48,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-26 04:43:48,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:48,906 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:48,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:48,906 INFO L82 PathProgramCache]: Analyzing trace with hash -879707189, now seen corresponding path program 60 times [2021-08-26 04:43:48,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:48,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002911273] [2021-08-26 04:43:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:48,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:50,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:50,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002911273] [2021-08-26 04:43:50,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002911273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:50,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008257924] [2021-08-26 04:43:50,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:43:50,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:50,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:50,251 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:50,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-26 04:43:51,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-08-26 04:43:51,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:51,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-26 04:43:51,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:51,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:51,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008257924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:51,314 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:51,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2021-08-26 04:43:51,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863238052] [2021-08-26 04:43:51,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-26 04:43:51,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:51,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-26 04:43:51,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-08-26 04:43:51,315 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 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 04:43:51,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:51,368 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-08-26 04:43:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-26 04:43:51,368 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 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 67 [2021-08-26 04:43:51,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:51,368 INFO L225 Difference]: With dead ends: 73 [2021-08-26 04:43:51,369 INFO L226 Difference]: Without dead ends: 69 [2021-08-26 04:43:51,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1244.0ms TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-08-26 04:43:51,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-08-26 04:43:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-08-26 04:43:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 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 04:43:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-08-26 04:43:51,370 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2021-08-26 04:43:51,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:51,370 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-08-26 04:43:51,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 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 04:43:51,370 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-08-26 04:43:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-08-26 04:43:51,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:51,371 INFO L512 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:51,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-26 04:43:51,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:51,571 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:51,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:51,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1499453677, now seen corresponding path program 61 times [2021-08-26 04:43:51,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:51,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257718648] [2021-08-26 04:43:51,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:51,572 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:52,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:52,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:52,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257718648] [2021-08-26 04:43:52,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257718648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:52,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829378817] [2021-08-26 04:43:52,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:43:52,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:52,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:52,977 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:52,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-26 04:43:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:53,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-26 04:43:53,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:54,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829378817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:54,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:54,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2021-08-26 04:43:54,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851787034] [2021-08-26 04:43:54,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-08-26 04:43:54,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:54,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-08-26 04:43:54,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-08-26 04:43:54,019 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 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 04:43:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:54,071 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-08-26 04:43:54,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-08-26 04:43:54,071 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 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 68 [2021-08-26 04:43:54,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:54,071 INFO L225 Difference]: With dead ends: 74 [2021-08-26 04:43:54,071 INFO L226 Difference]: Without dead ends: 70 [2021-08-26 04:43:54,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1298.2ms TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-08-26 04:43:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-26 04:43:54,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-08-26 04:43:54,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 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 04:43:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-08-26 04:43:54,073 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2021-08-26 04:43:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:54,073 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-08-26 04:43:54,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 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 04:43:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-08-26 04:43:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-08-26 04:43:54,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:54,074 INFO L512 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:54,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-26 04:43:54,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:54,274 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:54,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:54,275 INFO L82 PathProgramCache]: Analyzing trace with hash 763241675, now seen corresponding path program 62 times [2021-08-26 04:43:54,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:54,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627212376] [2021-08-26 04:43:54,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:54,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:55,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:55,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627212376] [2021-08-26 04:43:55,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627212376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:55,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472534584] [2021-08-26 04:43:55,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:43:55,716 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:55,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:55,729 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:55,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-26 04:43:56,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:43:56,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:56,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 64 conjunts are in the unsatisfiable core [2021-08-26 04:43:56,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:56,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472534584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:56,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:56,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2021-08-26 04:43:56,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706752201] [2021-08-26 04:43:56,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-08-26 04:43:56,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:56,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-08-26 04:43:56,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-08-26 04:43:56,813 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 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 04:43:56,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:56,862 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-08-26 04:43:56,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-26 04:43:56,862 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 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 69 [2021-08-26 04:43:56,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:56,863 INFO L225 Difference]: With dead ends: 75 [2021-08-26 04:43:56,863 INFO L226 Difference]: Without dead ends: 71 [2021-08-26 04:43:56,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1325.3ms TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-08-26 04:43:56,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-26 04:43:56,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-08-26 04:43:56,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 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 04:43:56,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-08-26 04:43:56,865 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2021-08-26 04:43:56,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:56,865 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-08-26 04:43:56,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 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 04:43:56,865 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-08-26 04:43:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-26 04:43:56,865 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:56,865 INFO L512 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:56,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-26 04:43:57,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:57,066 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:57,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:57,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2107646445, now seen corresponding path program 63 times [2021-08-26 04:43:57,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:57,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369557714] [2021-08-26 04:43:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:57,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:43:58,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:58,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:43:58,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369557714] [2021-08-26 04:43:58,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369557714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:58,544 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147223717] [2021-08-26 04:43:58,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:43:58,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:43:58,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:43:58,547 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:43:58,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-26 04:43:59,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2021-08-26 04:43:59,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:43:59,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 65 conjunts are in the unsatisfiable core [2021-08-26 04:43:59,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:43:59,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:43:59,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147223717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:43:59,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:43:59,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2021-08-26 04:43:59,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951785036] [2021-08-26 04:43:59,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-26 04:43:59,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:43:59,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-26 04:43:59,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-08-26 04:43:59,673 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 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 04:43:59,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:43:59,738 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-08-26 04:43:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-08-26 04:43:59,739 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 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 70 [2021-08-26 04:43:59,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:43:59,740 INFO L225 Difference]: With dead ends: 76 [2021-08-26 04:43:59,740 INFO L226 Difference]: Without dead ends: 72 [2021-08-26 04:43:59,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1364.9ms TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-08-26 04:43:59,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-26 04:43:59,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-08-26 04:43:59,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 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 04:43:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-08-26 04:43:59,742 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2021-08-26 04:43:59,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:43:59,742 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-08-26 04:43:59,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 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 04:43:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-08-26 04:43:59,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-26 04:43:59,742 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:43:59,742 INFO L512 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:43:59,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-26 04:43:59,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-26 04:43:59,949 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:43:59,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:43:59,950 INFO L82 PathProgramCache]: Analyzing trace with hash -910864949, now seen corresponding path program 64 times [2021-08-26 04:43:59,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:43:59,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330555579] [2021-08-26 04:43:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:43:59,950 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:43:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:01,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:01,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:01,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330555579] [2021-08-26 04:44:01,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330555579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:01,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445653415] [2021-08-26 04:44:01,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:44:01,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:01,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:01,521 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:01,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-26 04:44:02,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:44:02,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:44:02,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-26 04:44:02,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:02,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445653415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:02,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:02,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2021-08-26 04:44:02,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220185136] [2021-08-26 04:44:02,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-26 04:44:02,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:02,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-26 04:44:02,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-08-26 04:44:02,686 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 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 04:44:02,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:02,746 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-08-26 04:44:02,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-08-26 04:44:02,747 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 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 71 [2021-08-26 04:44:02,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:02,747 INFO L225 Difference]: With dead ends: 77 [2021-08-26 04:44:02,748 INFO L226 Difference]: Without dead ends: 73 [2021-08-26 04:44:02,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1456.6ms TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-08-26 04:44:02,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-26 04:44:02,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-08-26 04:44:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 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 04:44:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-08-26 04:44:02,750 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2021-08-26 04:44:02,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:02,750 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-08-26 04:44:02,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 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 04:44:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-08-26 04:44:02,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-26 04:44:02,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:02,750 INFO L512 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:02,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-26 04:44:02,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:02,971 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:02,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1829623059, now seen corresponding path program 65 times [2021-08-26 04:44:02,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:02,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119030384] [2021-08-26 04:44:02,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:02,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:04,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:04,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119030384] [2021-08-26 04:44:04,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119030384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:04,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8013975] [2021-08-26 04:44:04,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:44:04,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:04,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:04,550 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:04,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-26 04:44:05,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-08-26 04:44:05,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:44:05,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-26 04:44:05,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:05,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8013975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:05,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:05,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2021-08-26 04:44:05,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852392091] [2021-08-26 04:44:05,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-08-26 04:44:05,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:05,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-08-26 04:44:05,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-08-26 04:44:05,762 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 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 04:44:05,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:05,814 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-08-26 04:44:05,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-08-26 04:44:05,814 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 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 72 [2021-08-26 04:44:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:05,815 INFO L225 Difference]: With dead ends: 78 [2021-08-26 04:44:05,815 INFO L226 Difference]: Without dead ends: 74 [2021-08-26 04:44:05,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1467.0ms TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-08-26 04:44:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-26 04:44:05,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-08-26 04:44:05,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 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 04:44:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2021-08-26 04:44:05,817 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2021-08-26 04:44:05,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:05,817 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2021-08-26 04:44:05,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 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 04:44:05,818 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2021-08-26 04:44:05,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-26 04:44:05,818 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:05,818 INFO L512 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:05,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-26 04:44:06,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-26 04:44:06,033 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:06,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:06,033 INFO L82 PathProgramCache]: Analyzing trace with hash 885405387, now seen corresponding path program 66 times [2021-08-26 04:44:06,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:06,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956935870] [2021-08-26 04:44:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:06,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:07,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:07,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956935870] [2021-08-26 04:44:07,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956935870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:07,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103821160] [2021-08-26 04:44:07,683 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:44:07,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:07,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:07,684 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:07,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-26 04:44:08,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2021-08-26 04:44:08,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:44:08,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 68 conjunts are in the unsatisfiable core [2021-08-26 04:44:08,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:08,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103821160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:08,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:08,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2021-08-26 04:44:08,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081617594] [2021-08-26 04:44:08,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-08-26 04:44:08,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:08,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-26 04:44:08,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-08-26 04:44:08,911 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 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 04:44:08,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:08,977 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2021-08-26 04:44:08,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-08-26 04:44:08,977 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 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 73 [2021-08-26 04:44:08,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:08,978 INFO L225 Difference]: With dead ends: 79 [2021-08-26 04:44:08,978 INFO L226 Difference]: Without dead ends: 75 [2021-08-26 04:44:08,978 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1527.9ms TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-08-26 04:44:08,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-26 04:44:08,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-08-26 04:44:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 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 04:44:08,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-08-26 04:44:08,980 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2021-08-26 04:44:08,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:08,980 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-08-26 04:44:08,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 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 04:44:08,980 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-08-26 04:44:08,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-26 04:44:08,981 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:08,981 INFO L512 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:09,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-26 04:44:09,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-26 04:44:09,185 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:09,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:09,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1679428627, now seen corresponding path program 67 times [2021-08-26 04:44:09,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:09,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384791156] [2021-08-26 04:44:09,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:09,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:10,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:10,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:10,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384791156] [2021-08-26 04:44:10,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384791156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:10,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059252342] [2021-08-26 04:44:10,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:44:10,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:10,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:10,899 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:10,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-26 04:44:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:11,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 69 conjunts are in the unsatisfiable core [2021-08-26 04:44:11,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:12,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059252342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:12,140 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:12,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2021-08-26 04:44:12,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60082428] [2021-08-26 04:44:12,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-08-26 04:44:12,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:12,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-08-26 04:44:12,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-08-26 04:44:12,142 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 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 04:44:12,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:12,200 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-08-26 04:44:12,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-08-26 04:44:12,200 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 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 74 [2021-08-26 04:44:12,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:12,200 INFO L225 Difference]: With dead ends: 80 [2021-08-26 04:44:12,200 INFO L226 Difference]: Without dead ends: 76 [2021-08-26 04:44:12,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1589.2ms TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-08-26 04:44:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-08-26 04:44:12,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-08-26 04:44:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 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 04:44:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2021-08-26 04:44:12,202 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2021-08-26 04:44:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:12,202 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2021-08-26 04:44:12,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 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 04:44:12,203 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2021-08-26 04:44:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-26 04:44:12,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:12,203 INFO L512 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:12,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-26 04:44:12,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-26 04:44:12,403 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:12,404 INFO L82 PathProgramCache]: Analyzing trace with hash 524345291, now seen corresponding path program 68 times [2021-08-26 04:44:12,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:12,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837511344] [2021-08-26 04:44:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:12,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:14,153 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:14,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:14,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837511344] [2021-08-26 04:44:14,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837511344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:14,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98009841] [2021-08-26 04:44:14,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:44:14,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:14,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:14,164 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:14,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-26 04:44:15,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:44:15,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:44:15,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-26 04:44:15,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:15,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98009841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:15,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:15,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2021-08-26 04:44:15,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417303595] [2021-08-26 04:44:15,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-26 04:44:15,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:15,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-26 04:44:15,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-08-26 04:44:15,467 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 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 04:44:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:15,526 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2021-08-26 04:44:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-08-26 04:44:15,526 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 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 75 [2021-08-26 04:44:15,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:15,526 INFO L225 Difference]: With dead ends: 81 [2021-08-26 04:44:15,527 INFO L226 Difference]: Without dead ends: 77 [2021-08-26 04:44:15,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1633.4ms TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-08-26 04:44:15,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-26 04:44:15,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-08-26 04:44:15,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 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 04:44:15,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-08-26 04:44:15,528 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2021-08-26 04:44:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:15,528 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-08-26 04:44:15,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 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 04:44:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-08-26 04:44:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-26 04:44:15,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:15,529 INFO L512 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:15,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-26 04:44:15,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-26 04:44:15,745 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:15,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:15,745 INFO L82 PathProgramCache]: Analyzing trace with hash -923499757, now seen corresponding path program 69 times [2021-08-26 04:44:15,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:15,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178817171] [2021-08-26 04:44:15,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:15,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:15,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:17,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:17,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178817171] [2021-08-26 04:44:17,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178817171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:17,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553107400] [2021-08-26 04:44:17,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:44:17,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:17,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:17,514 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:17,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-26 04:44:18,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-08-26 04:44:18,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:44:18,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 71 conjunts are in the unsatisfiable core [2021-08-26 04:44:18,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:18,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553107400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:18,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:18,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2021-08-26 04:44:18,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391688194] [2021-08-26 04:44:18,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-08-26 04:44:18,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:18,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-08-26 04:44:18,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-08-26 04:44:18,832 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 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 04:44:18,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:18,885 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-08-26 04:44:18,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-08-26 04:44:18,885 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 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 76 [2021-08-26 04:44:18,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:18,886 INFO L225 Difference]: With dead ends: 82 [2021-08-26 04:44:18,886 INFO L226 Difference]: Without dead ends: 78 [2021-08-26 04:44:18,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1648.9ms TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-08-26 04:44:18,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-26 04:44:18,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-08-26 04:44:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 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 04:44:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-08-26 04:44:18,887 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2021-08-26 04:44:18,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:18,887 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-08-26 04:44:18,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 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 04:44:18,888 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-08-26 04:44:18,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-08-26 04:44:18,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:18,888 INFO L512 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:18,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-26 04:44:19,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:19,088 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:19,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:19,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1437944011, now seen corresponding path program 70 times [2021-08-26 04:44:19,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:19,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344336616] [2021-08-26 04:44:19,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:19,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:20,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:20,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344336616] [2021-08-26 04:44:20,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344336616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:20,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507046348] [2021-08-26 04:44:20,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:44:20,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:20,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:20,939 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:20,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-26 04:44:22,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:44:22,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:44:22,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-26 04:44:22,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:22,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507046348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:22,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:22,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2021-08-26 04:44:22,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394254626] [2021-08-26 04:44:22,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-26 04:44:22,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:22,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-26 04:44:22,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-08-26 04:44:22,240 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 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 04:44:22,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:22,299 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-08-26 04:44:22,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-26 04:44:22,299 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 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 77 [2021-08-26 04:44:22,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:22,300 INFO L225 Difference]: With dead ends: 83 [2021-08-26 04:44:22,300 INFO L226 Difference]: Without dead ends: 79 [2021-08-26 04:44:22,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1715.7ms TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-08-26 04:44:22,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-26 04:44:22,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-08-26 04:44:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 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 04:44:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-08-26 04:44:22,302 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2021-08-26 04:44:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:22,302 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-08-26 04:44:22,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 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 04:44:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-08-26 04:44:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-26 04:44:22,303 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:22,303 INFO L512 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:22,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-26 04:44:22,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:22,513 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:22,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:22,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1628256787, now seen corresponding path program 71 times [2021-08-26 04:44:22,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:22,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764314590] [2021-08-26 04:44:22,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:22,513 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:24,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:24,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764314590] [2021-08-26 04:44:24,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764314590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:24,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878483133] [2021-08-26 04:44:24,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:44:24,348 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:24,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:24,355 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:24,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-26 04:44:25,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-08-26 04:44:25,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:44:25,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 73 conjunts are in the unsatisfiable core [2021-08-26 04:44:25,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:25,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878483133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:25,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:25,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2021-08-26 04:44:25,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318793729] [2021-08-26 04:44:25,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-08-26 04:44:25,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:25,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-08-26 04:44:25,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-08-26 04:44:25,740 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 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 04:44:25,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:25,792 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-08-26 04:44:25,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-08-26 04:44:25,793 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 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 78 [2021-08-26 04:44:25,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:25,793 INFO L225 Difference]: With dead ends: 84 [2021-08-26 04:44:25,793 INFO L226 Difference]: Without dead ends: 80 [2021-08-26 04:44:25,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1716.1ms TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-08-26 04:44:25,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-26 04:44:25,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-08-26 04:44:25,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 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 04:44:25,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2021-08-26 04:44:25,795 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2021-08-26 04:44:25,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:25,796 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2021-08-26 04:44:25,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 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 04:44:25,796 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2021-08-26 04:44:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-26 04:44:25,796 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:25,796 INFO L512 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:25,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-26 04:44:26,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:26,008 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:26,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:26,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1061981749, now seen corresponding path program 72 times [2021-08-26 04:44:26,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:26,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135979874] [2021-08-26 04:44:26,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:26,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:27,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:27,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:27,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135979874] [2021-08-26 04:44:27,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135979874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:27,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986257587] [2021-08-26 04:44:27,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:44:27,903 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:27,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:27,904 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:27,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-26 04:44:29,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-08-26 04:44:29,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:44:29,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-26 04:44:29,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:29,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986257587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:29,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:29,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2021-08-26 04:44:29,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842213711] [2021-08-26 04:44:29,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-26 04:44:29,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:29,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-26 04:44:29,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-08-26 04:44:29,305 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 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 04:44:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:29,375 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-08-26 04:44:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-08-26 04:44:29,375 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 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 79 [2021-08-26 04:44:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:29,375 INFO L225 Difference]: With dead ends: 85 [2021-08-26 04:44:29,375 INFO L226 Difference]: Without dead ends: 81 [2021-08-26 04:44:29,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1766.6ms TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-08-26 04:44:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-26 04:44:29,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-08-26 04:44:29,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 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 04:44:29,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-08-26 04:44:29,378 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2021-08-26 04:44:29,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:29,378 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-08-26 04:44:29,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 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 04:44:29,378 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-08-26 04:44:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-26 04:44:29,378 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:29,379 INFO L512 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:29,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-26 04:44:29,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-08-26 04:44:29,593 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:29,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1439969555, now seen corresponding path program 73 times [2021-08-26 04:44:29,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:29,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075114718] [2021-08-26 04:44:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:29,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:31,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:31,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075114718] [2021-08-26 04:44:31,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075114718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:31,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721812298] [2021-08-26 04:44:31,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:44:31,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:31,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:31,625 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:31,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-26 04:44:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:32,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 75 conjunts are in the unsatisfiable core [2021-08-26 04:44:32,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:33,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721812298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:33,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:33,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2021-08-26 04:44:33,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476227004] [2021-08-26 04:44:33,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-08-26 04:44:33,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:33,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-08-26 04:44:33,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-08-26 04:44:33,068 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 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 04:44:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:33,126 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-08-26 04:44:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-08-26 04:44:33,127 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 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 80 [2021-08-26 04:44:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:33,127 INFO L225 Difference]: With dead ends: 86 [2021-08-26 04:44:33,127 INFO L226 Difference]: Without dead ends: 82 [2021-08-26 04:44:33,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1903.6ms TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-08-26 04:44:33,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-26 04:44:33,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-08-26 04:44:33,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 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 04:44:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2021-08-26 04:44:33,129 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2021-08-26 04:44:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:33,129 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2021-08-26 04:44:33,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 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 04:44:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2021-08-26 04:44:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-08-26 04:44:33,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:33,129 INFO L512 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:33,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-26 04:44:33,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:33,337 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:33,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:33,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1691048651, now seen corresponding path program 74 times [2021-08-26 04:44:33,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:33,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135595638] [2021-08-26 04:44:33,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:33,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:35,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:35,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135595638] [2021-08-26 04:44:35,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135595638] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:35,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352871778] [2021-08-26 04:44:35,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:44:35,344 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:35,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:35,344 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:35,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-26 04:44:36,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:44:36,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:44:36,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 76 conjunts are in the unsatisfiable core [2021-08-26 04:44:36,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:36,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:36,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352871778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:36,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:36,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2021-08-26 04:44:36,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739919422] [2021-08-26 04:44:36,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-08-26 04:44:36,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:36,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-08-26 04:44:36,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-08-26 04:44:36,771 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 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 04:44:36,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:36,825 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2021-08-26 04:44:36,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-26 04:44:36,826 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 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 81 [2021-08-26 04:44:36,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:36,826 INFO L225 Difference]: With dead ends: 87 [2021-08-26 04:44:36,826 INFO L226 Difference]: Without dead ends: 83 [2021-08-26 04:44:36,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1879.4ms TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-08-26 04:44:36,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-26 04:44:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-08-26 04:44:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 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 04:44:36,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-08-26 04:44:36,828 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2021-08-26 04:44:36,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:36,828 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-08-26 04:44:36,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 states have internal predecessors, (81), 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 04:44:36,828 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-08-26 04:44:36,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-26 04:44:36,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:36,828 INFO L512 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:36,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-26 04:44:37,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:37,029 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:37,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:37,030 INFO L82 PathProgramCache]: Analyzing trace with hash 884566035, now seen corresponding path program 75 times [2021-08-26 04:44:37,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:37,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636110997] [2021-08-26 04:44:37,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:37,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:39,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:39,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636110997] [2021-08-26 04:44:39,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636110997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:39,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483239273] [2021-08-26 04:44:39,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:44:39,075 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:39,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:39,075 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:39,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-26 04:44:40,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-08-26 04:44:40,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:44:40,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 77 conjunts are in the unsatisfiable core [2021-08-26 04:44:40,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:40,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483239273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:40,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:40,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2021-08-26 04:44:40,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185046688] [2021-08-26 04:44:40,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-08-26 04:44:40,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:40,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-08-26 04:44:40,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-08-26 04:44:40,584 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 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 04:44:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:40,646 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-08-26 04:44:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-08-26 04:44:40,646 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 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 82 [2021-08-26 04:44:40,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:40,647 INFO L225 Difference]: With dead ends: 88 [2021-08-26 04:44:40,647 INFO L226 Difference]: Without dead ends: 84 [2021-08-26 04:44:40,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1915.0ms TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-08-26 04:44:40,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-08-26 04:44:40,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-08-26 04:44:40,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 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 04:44:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-08-26 04:44:40,648 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2021-08-26 04:44:40,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:40,649 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-08-26 04:44:40,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 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 04:44:40,649 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-08-26 04:44:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-08-26 04:44:40,649 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:40,649 INFO L512 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:40,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-26 04:44:40,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-08-26 04:44:40,849 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:40,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:40,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1653408715, now seen corresponding path program 76 times [2021-08-26 04:44:40,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:40,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568361408] [2021-08-26 04:44:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:40,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:40,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:42,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:42,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:42,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568361408] [2021-08-26 04:44:42,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568361408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:42,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011274057] [2021-08-26 04:44:42,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:44:42,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:42,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:42,957 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:42,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-26 04:44:44,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:44:44,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:44:44,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-26 04:44:44,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:44,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011274057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:44,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:44,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2021-08-26 04:44:44,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166546870] [2021-08-26 04:44:44,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-26 04:44:44,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:44,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-26 04:44:44,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-08-26 04:44:44,491 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 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 04:44:44,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:44,552 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2021-08-26 04:44:44,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-08-26 04:44:44,553 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 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 83 [2021-08-26 04:44:44,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:44,553 INFO L225 Difference]: With dead ends: 89 [2021-08-26 04:44:44,554 INFO L226 Difference]: Without dead ends: 85 [2021-08-26 04:44:44,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1973.9ms TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-08-26 04:44:44,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-26 04:44:44,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-08-26 04:44:44,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 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 04:44:44,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-08-26 04:44:44,556 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2021-08-26 04:44:44,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:44,556 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-08-26 04:44:44,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 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 04:44:44,556 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-08-26 04:44:44,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-26 04:44:44,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:44,556 INFO L512 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:44,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-26 04:44:44,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-26 04:44:44,779 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:44,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:44,779 INFO L82 PathProgramCache]: Analyzing trace with hash -282271981, now seen corresponding path program 77 times [2021-08-26 04:44:44,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:44,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860440090] [2021-08-26 04:44:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:44,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:46,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:46,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860440090] [2021-08-26 04:44:46,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860440090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:46,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035961776] [2021-08-26 04:44:46,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:44:46,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:46,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:46,976 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:46,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-26 04:44:48,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-08-26 04:44:48,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:44:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 79 conjunts are in the unsatisfiable core [2021-08-26 04:44:48,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:48,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:48,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035961776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:48,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:48,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2021-08-26 04:44:48,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328708090] [2021-08-26 04:44:48,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-08-26 04:44:48,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:48,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-08-26 04:44:48,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-08-26 04:44:48,540 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 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 04:44:48,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:48,603 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-08-26 04:44:48,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-08-26 04:44:48,604 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 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 84 [2021-08-26 04:44:48,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:48,604 INFO L225 Difference]: With dead ends: 90 [2021-08-26 04:44:48,604 INFO L226 Difference]: Without dead ends: 86 [2021-08-26 04:44:48,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2058.4ms TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-08-26 04:44:48,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-26 04:44:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-08-26 04:44:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 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 04:44:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2021-08-26 04:44:48,606 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2021-08-26 04:44:48,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:48,607 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2021-08-26 04:44:48,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 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 04:44:48,607 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2021-08-26 04:44:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-26 04:44:48,607 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:48,607 INFO L512 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:48,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-26 04:44:48,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:48,817 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:48,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:48,817 INFO L82 PathProgramCache]: Analyzing trace with hash -158831413, now seen corresponding path program 78 times [2021-08-26 04:44:48,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:48,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489044025] [2021-08-26 04:44:48,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:48,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:51,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:51,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489044025] [2021-08-26 04:44:51,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489044025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:51,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236771520] [2021-08-26 04:44:51,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:44:51,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:51,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:51,033 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:51,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-26 04:44:52,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2021-08-26 04:44:52,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:44:52,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-26 04:44:52,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:52,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:52,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236771520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:52,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:52,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2021-08-26 04:44:52,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389932049] [2021-08-26 04:44:52,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-08-26 04:44:52,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:52,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-08-26 04:44:52,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-08-26 04:44:52,645 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 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 04:44:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:52,703 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2021-08-26 04:44:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-08-26 04:44:52,704 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 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 85 [2021-08-26 04:44:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:52,704 INFO L225 Difference]: With dead ends: 91 [2021-08-26 04:44:52,704 INFO L226 Difference]: Without dead ends: 87 [2021-08-26 04:44:52,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2080.1ms TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-08-26 04:44:52,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-26 04:44:52,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-08-26 04:44:52,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 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 04:44:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-08-26 04:44:52,706 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2021-08-26 04:44:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:52,706 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-08-26 04:44:52,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 states have internal predecessors, (85), 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 04:44:52,706 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-08-26 04:44:52,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-26 04:44:52,707 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:52,707 INFO L512 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:52,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-26 04:44:52,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:52,921 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:52,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:52,921 INFO L82 PathProgramCache]: Analyzing trace with hash -627141101, now seen corresponding path program 79 times [2021-08-26 04:44:52,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:52,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472584744] [2021-08-26 04:44:52,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:52,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:55,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:55,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:55,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472584744] [2021-08-26 04:44:55,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472584744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:55,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200000934] [2021-08-26 04:44:55,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:44:55,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:55,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:55,197 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:55,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-26 04:44:56,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:56,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 81 conjunts are in the unsatisfiable core [2021-08-26 04:44:56,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:44:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:56,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200000934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:56,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:44:56,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2021-08-26 04:44:56,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933709185] [2021-08-26 04:44:56,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-08-26 04:44:56,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:44:56,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-08-26 04:44:56,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-08-26 04:44:56,813 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 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 04:44:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:44:56,871 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-08-26 04:44:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-08-26 04:44:56,871 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 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 86 [2021-08-26 04:44:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:44:56,872 INFO L225 Difference]: With dead ends: 92 [2021-08-26 04:44:56,872 INFO L226 Difference]: Without dead ends: 88 [2021-08-26 04:44:56,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2139.1ms TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-08-26 04:44:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-26 04:44:56,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-08-26 04:44:56,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 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 04:44:56,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2021-08-26 04:44:56,873 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2021-08-26 04:44:56,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:44:56,874 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2021-08-26 04:44:56,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 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 04:44:56,874 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2021-08-26 04:44:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-08-26 04:44:56,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:44:56,874 INFO L512 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:44:56,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-26 04:44:57,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:57,082 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:44:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:44:57,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2035127755, now seen corresponding path program 80 times [2021-08-26 04:44:57,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:44:57,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110242325] [2021-08-26 04:44:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:44:57,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:44:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:44:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:44:59,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:44:59,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110242325] [2021-08-26 04:44:59,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110242325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:44:59,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069529209] [2021-08-26 04:44:59,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:44:59,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:44:59,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:44:59,394 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:44:59,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-26 04:45:00,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:45:00,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:45:00,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 82 conjunts are in the unsatisfiable core [2021-08-26 04:45:00,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:45:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:01,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069529209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:01,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:45:01,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2021-08-26 04:45:01,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289183915] [2021-08-26 04:45:01,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-08-26 04:45:01,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:45:01,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-08-26 04:45:01,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-08-26 04:45:01,062 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 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 04:45:01,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:45:01,119 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2021-08-26 04:45:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-08-26 04:45:01,120 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 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 04:45:01,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:45:01,122 INFO L225 Difference]: With dead ends: 93 [2021-08-26 04:45:01,122 INFO L226 Difference]: Without dead ends: 89 [2021-08-26 04:45:01,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2173.0ms TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-08-26 04:45:01,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-26 04:45:01,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-08-26 04:45:01,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 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 04:45:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-08-26 04:45:01,129 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2021-08-26 04:45:01,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:45:01,129 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-08-26 04:45:01,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 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 04:45:01,129 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-08-26 04:45:01,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-26 04:45:01,130 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:45:01,130 INFO L512 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:45:01,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-26 04:45:01,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:01,341 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:45:01,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:45:01,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1333883629, now seen corresponding path program 81 times [2021-08-26 04:45:01,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:45:01,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150309978] [2021-08-26 04:45:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:45:01,341 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:45:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:45:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:03,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:45:03,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150309978] [2021-08-26 04:45:03,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150309978] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:03,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968562417] [2021-08-26 04:45:03,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:45:03,713 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:03,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:45:03,714 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:45:03,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-26 04:45:05,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-08-26 04:45:05,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:45:05,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 83 conjunts are in the unsatisfiable core [2021-08-26 04:45:05,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:45:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:05,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968562417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:05,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:45:05,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2021-08-26 04:45:05,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376019883] [2021-08-26 04:45:05,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-08-26 04:45:05,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:45:05,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-08-26 04:45:05,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-08-26 04:45:05,409 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 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 04:45:05,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:45:05,485 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-08-26 04:45:05,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-26 04:45:05,486 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 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 88 [2021-08-26 04:45:05,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:45:05,486 INFO L225 Difference]: With dead ends: 94 [2021-08-26 04:45:05,486 INFO L226 Difference]: Without dead ends: 90 [2021-08-26 04:45:05,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2233.8ms TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-08-26 04:45:05,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-26 04:45:05,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-08-26 04:45:05,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 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 04:45:05,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2021-08-26 04:45:05,488 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2021-08-26 04:45:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:45:05,488 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2021-08-26 04:45:05,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 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 04:45:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2021-08-26 04:45:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-08-26 04:45:05,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:45:05,488 INFO L512 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:45:05,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-26 04:45:05,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:05,689 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:45:05,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:45:05,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1600945867, now seen corresponding path program 82 times [2021-08-26 04:45:05,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:45:05,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986465666] [2021-08-26 04:45:05,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:45:05,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:45:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:45:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:08,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:45:08,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986465666] [2021-08-26 04:45:08,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986465666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:08,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037435000] [2021-08-26 04:45:08,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:45:08,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:08,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:45:08,151 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:45:08,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-26 04:45:09,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:45:09,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:45:09,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 84 conjunts are in the unsatisfiable core [2021-08-26 04:45:09,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:45:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:09,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037435000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:09,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:45:09,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2021-08-26 04:45:09,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135454212] [2021-08-26 04:45:09,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-08-26 04:45:09,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:45:09,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-08-26 04:45:09,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-08-26 04:45:09,888 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 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 04:45:09,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:45:09,952 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-08-26 04:45:09,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-08-26 04:45:09,952 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 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 89 [2021-08-26 04:45:09,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:45:09,953 INFO L225 Difference]: With dead ends: 95 [2021-08-26 04:45:09,953 INFO L226 Difference]: Without dead ends: 91 [2021-08-26 04:45:09,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2318.6ms TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-08-26 04:45:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-26 04:45:09,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-08-26 04:45:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 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 04:45:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-08-26 04:45:09,955 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2021-08-26 04:45:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:45:09,955 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-08-26 04:45:09,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 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 04:45:09,955 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-08-26 04:45:09,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-08-26 04:45:09,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:45:09,955 INFO L512 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:45:09,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-26 04:45:10,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-26 04:45:10,156 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:45:10,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:45:10,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1908620269, now seen corresponding path program 83 times [2021-08-26 04:45:10,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:45:10,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216287061] [2021-08-26 04:45:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:45:10,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:45:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:45:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:12,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:45:12,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216287061] [2021-08-26 04:45:12,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216287061] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:12,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818216560] [2021-08-26 04:45:12,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:45:12,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:12,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:45:12,665 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:45:12,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-26 04:45:14,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-08-26 04:45:14,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:45:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 85 conjunts are in the unsatisfiable core [2021-08-26 04:45:14,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:45:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:14,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818216560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:14,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:45:14,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2021-08-26 04:45:14,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885960034] [2021-08-26 04:45:14,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-08-26 04:45:14,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:45:14,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-08-26 04:45:14,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-08-26 04:45:14,422 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 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 04:45:14,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:45:14,486 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-08-26 04:45:14,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-26 04:45:14,486 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 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 90 [2021-08-26 04:45:14,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:45:14,487 INFO L225 Difference]: With dead ends: 96 [2021-08-26 04:45:14,487 INFO L226 Difference]: Without dead ends: 92 [2021-08-26 04:45:14,487 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2366.6ms TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-08-26 04:45:14,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-26 04:45:14,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-08-26 04:45:14,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 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 04:45:14,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2021-08-26 04:45:14,489 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2021-08-26 04:45:14,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:45:14,489 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2021-08-26 04:45:14,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 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 04:45:14,489 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2021-08-26 04:45:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-26 04:45:14,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:45:14,490 INFO L512 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:45:14,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-26 04:45:14,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:14,705 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:45:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:45:14,705 INFO L82 PathProgramCache]: Analyzing trace with hash 963979211, now seen corresponding path program 84 times [2021-08-26 04:45:14,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:45:14,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900267091] [2021-08-26 04:45:14,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:45:14,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:45:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:45:17,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:17,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:45:17,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900267091] [2021-08-26 04:45:17,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900267091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:17,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828945584] [2021-08-26 04:45:17,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:45:17,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:17,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:45:17,305 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:45:17,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-26 04:45:18,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-08-26 04:45:18,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:45:18,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-26 04:45:18,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:45:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:19,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828945584] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:19,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:45:19,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2021-08-26 04:45:19,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491239704] [2021-08-26 04:45:19,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-26 04:45:19,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:45:19,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-26 04:45:19,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-08-26 04:45:19,126 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 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 04:45:19,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:45:19,198 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2021-08-26 04:45:19,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-26 04:45:19,198 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 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 91 [2021-08-26 04:45:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:45:19,199 INFO L225 Difference]: With dead ends: 97 [2021-08-26 04:45:19,199 INFO L226 Difference]: Without dead ends: 93 [2021-08-26 04:45:19,199 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2451.0ms TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-08-26 04:45:19,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-26 04:45:19,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-08-26 04:45:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 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 04:45:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-08-26 04:45:19,201 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2021-08-26 04:45:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:45:19,201 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-08-26 04:45:19,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 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 04:45:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-08-26 04:45:19,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-08-26 04:45:19,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:45:19,202 INFO L512 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:45:19,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-26 04:45:19,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:19,425 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:45:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:45:19,425 INFO L82 PathProgramCache]: Analyzing trace with hash -179750125, now seen corresponding path program 85 times [2021-08-26 04:45:19,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:45:19,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015039505] [2021-08-26 04:45:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:45:19,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:45:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:45:22,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:22,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:45:22,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015039505] [2021-08-26 04:45:22,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015039505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:22,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194338093] [2021-08-26 04:45:22,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:45:22,135 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:22,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:45:22,137 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:45:22,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-26 04:45:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:45:23,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 87 conjunts are in the unsatisfiable core [2021-08-26 04:45:23,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:45:23,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:23,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194338093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:23,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:45:23,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2021-08-26 04:45:23,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611444734] [2021-08-26 04:45:23,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-08-26 04:45:23,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:45:23,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-08-26 04:45:23,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-08-26 04:45:23,975 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 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 04:45:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:45:24,044 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-08-26 04:45:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-08-26 04:45:24,045 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 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 92 [2021-08-26 04:45:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:45:24,045 INFO L225 Difference]: With dead ends: 98 [2021-08-26 04:45:24,045 INFO L226 Difference]: Without dead ends: 94 [2021-08-26 04:45:24,046 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2548.6ms TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-08-26 04:45:24,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-26 04:45:24,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-08-26 04:45:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 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 04:45:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2021-08-26 04:45:24,047 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2021-08-26 04:45:24,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:45:24,047 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2021-08-26 04:45:24,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 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 04:45:24,047 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2021-08-26 04:45:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-08-26 04:45:24,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:45:24,048 INFO L512 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:45:24,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-26 04:45:24,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:24,248 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:45:24,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:45:24,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1275621173, now seen corresponding path program 86 times [2021-08-26 04:45:24,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:45:24,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256047056] [2021-08-26 04:45:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:45:24,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:45:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:45:26,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:26,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:45:26,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256047056] [2021-08-26 04:45:26,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256047056] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:26,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461573205] [2021-08-26 04:45:26,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:45:26,939 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:26,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:45:26,940 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:45:26,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-26 04:45:28,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:45:28,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:45:28,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 88 conjunts are in the unsatisfiable core [2021-08-26 04:45:28,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:45:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:28,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461573205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:28,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:45:28,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2021-08-26 04:45:28,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400721253] [2021-08-26 04:45:28,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-08-26 04:45:28,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:45:28,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-08-26 04:45:28,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-08-26 04:45:28,819 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 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 04:45:28,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:45:28,886 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2021-08-26 04:45:28,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-08-26 04:45:28,886 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 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 04:45:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:45:28,887 INFO L225 Difference]: With dead ends: 99 [2021-08-26 04:45:28,887 INFO L226 Difference]: Without dead ends: 95 [2021-08-26 04:45:28,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2539.5ms TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-08-26 04:45:28,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-08-26 04:45:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-08-26 04:45:28,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 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 04:45:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-08-26 04:45:28,888 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2021-08-26 04:45:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:45:28,889 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-08-26 04:45:28,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 states have internal predecessors, (93), 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 04:45:28,889 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-08-26 04:45:28,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-26 04:45:28,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:45:28,889 INFO L512 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:45:28,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-26 04:45:29,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:29,090 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:45:29,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:45:29,090 INFO L82 PathProgramCache]: Analyzing trace with hash -887885293, now seen corresponding path program 87 times [2021-08-26 04:45:29,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:45:29,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074809320] [2021-08-26 04:45:29,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:45:29,090 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:45:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:45:31,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:31,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:45:31,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074809320] [2021-08-26 04:45:31,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074809320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:31,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928385758] [2021-08-26 04:45:31,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:45:31,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:31,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:45:31,885 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:45:31,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-26 04:45:33,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2021-08-26 04:45:33,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:45:33,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 89 conjunts are in the unsatisfiable core [2021-08-26 04:45:33,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:45:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:33,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928385758] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:33,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:45:33,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2021-08-26 04:45:33,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589600651] [2021-08-26 04:45:33,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-08-26 04:45:33,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:45:33,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-08-26 04:45:33,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-08-26 04:45:33,871 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 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 04:45:33,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:45:33,940 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-08-26 04:45:33,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-08-26 04:45:33,940 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 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 94 [2021-08-26 04:45:33,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:45:33,941 INFO L225 Difference]: With dead ends: 100 [2021-08-26 04:45:33,941 INFO L226 Difference]: Without dead ends: 96 [2021-08-26 04:45:33,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2638.9ms TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-08-26 04:45:33,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-26 04:45:33,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-08-26 04:45:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 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 04:45:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-08-26 04:45:33,943 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2021-08-26 04:45:33,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:45:33,943 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-08-26 04:45:33,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 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 04:45:33,943 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-08-26 04:45:33,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-08-26 04:45:33,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:45:33,943 INFO L512 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:45:33,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-26 04:45:34,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:34,144 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:45:34,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:45:34,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1752974901, now seen corresponding path program 88 times [2021-08-26 04:45:34,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:45:34,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493520387] [2021-08-26 04:45:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:45:34,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:45:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:45:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:36,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:45:36,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493520387] [2021-08-26 04:45:36,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493520387] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:36,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805764197] [2021-08-26 04:45:36,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:45:36,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:36,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:45:36,935 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:45:36,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-26 04:45:38,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:45:38,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:45:38,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 90 conjunts are in the unsatisfiable core [2021-08-26 04:45:38,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:45:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:38,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805764197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:38,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:45:38,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2021-08-26 04:45:38,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765294289] [2021-08-26 04:45:38,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-08-26 04:45:38,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:45:38,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-08-26 04:45:38,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-08-26 04:45:38,882 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 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 04:45:38,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:45:38,956 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2021-08-26 04:45:38,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-08-26 04:45:38,957 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 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 95 [2021-08-26 04:45:38,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:45:38,957 INFO L225 Difference]: With dead ends: 101 [2021-08-26 04:45:38,957 INFO L226 Difference]: Without dead ends: 97 [2021-08-26 04:45:38,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2633.5ms TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-08-26 04:45:38,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-26 04:45:38,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-08-26 04:45:38,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 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 04:45:38,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-08-26 04:45:38,959 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2021-08-26 04:45:38,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:45:38,959 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-08-26 04:45:38,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 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 04:45:38,959 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-08-26 04:45:38,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-08-26 04:45:38,960 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:45:38,960 INFO L512 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:45:38,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-26 04:45:39,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-08-26 04:45:39,169 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:45:39,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:45:39,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1494018323, now seen corresponding path program 89 times [2021-08-26 04:45:39,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:45:39,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380166878] [2021-08-26 04:45:39,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:45:39,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:45:39,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:45:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:42,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:45:42,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380166878] [2021-08-26 04:45:42,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380166878] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:42,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038899560] [2021-08-26 04:45:42,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:45:42,044 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:42,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:45:42,045 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:45:42,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-26 04:45:43,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-08-26 04:45:43,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:45:43,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 91 conjunts are in the unsatisfiable core [2021-08-26 04:45:43,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:45:44,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:44,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038899560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:44,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:45:44,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2021-08-26 04:45:44,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344220509] [2021-08-26 04:45:44,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-08-26 04:45:44,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:45:44,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-08-26 04:45:44,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-08-26 04:45:44,050 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 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 04:45:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:45:44,123 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-08-26 04:45:44,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-08-26 04:45:44,124 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 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 96 [2021-08-26 04:45:44,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:45:44,124 INFO L225 Difference]: With dead ends: 102 [2021-08-26 04:45:44,124 INFO L226 Difference]: Without dead ends: 98 [2021-08-26 04:45:44,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2700.5ms TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-08-26 04:45:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-08-26 04:45:44,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-08-26 04:45:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 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 04:45:44,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2021-08-26 04:45:44,126 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2021-08-26 04:45:44,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:45:44,126 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2021-08-26 04:45:44,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 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 04:45:44,126 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2021-08-26 04:45:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-26 04:45:44,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:45:44,127 INFO L512 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:45:44,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-26 04:45:44,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:44,349 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:45:44,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:45:44,349 INFO L82 PathProgramCache]: Analyzing trace with hash -928406837, now seen corresponding path program 90 times [2021-08-26 04:45:44,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:45:44,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665776540] [2021-08-26 04:45:44,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:45:44,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:45:44,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:45:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:47,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:45:47,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665776540] [2021-08-26 04:45:47,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665776540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:47,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107152617] [2021-08-26 04:45:47,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:45:47,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:47,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:45:47,290 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:45:47,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-26 04:45:49,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2021-08-26 04:45:49,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:45:49,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 92 conjunts are in the unsatisfiable core [2021-08-26 04:45:49,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:45:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:49,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107152617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:49,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:45:49,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2021-08-26 04:45:49,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235593800] [2021-08-26 04:45:49,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-08-26 04:45:49,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:45:49,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-08-26 04:45:49,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-08-26 04:45:49,317 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 states have internal predecessors, (97), 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 04:45:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:45:49,397 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2021-08-26 04:45:49,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-08-26 04:45:49,397 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 states have internal predecessors, (97), 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 97 [2021-08-26 04:45:49,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:45:49,398 INFO L225 Difference]: With dead ends: 103 [2021-08-26 04:45:49,398 INFO L226 Difference]: Without dead ends: 99 [2021-08-26 04:45:49,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2760.9ms TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-08-26 04:45:49,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-26 04:45:49,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-08-26 04:45:49,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 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 04:45:49,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-08-26 04:45:49,400 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2021-08-26 04:45:49,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:45:49,400 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-08-26 04:45:49,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 states have internal predecessors, (97), 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 04:45:49,401 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-08-26 04:45:49,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-08-26 04:45:49,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:45:49,401 INFO L512 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:45:49,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-26 04:45:49,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:49,617 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:45:49,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:45:49,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1285824531, now seen corresponding path program 91 times [2021-08-26 04:45:49,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:45:49,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288272090] [2021-08-26 04:45:49,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:45:49,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:45:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:45:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:52,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:45:52,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288272090] [2021-08-26 04:45:52,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288272090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:52,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693440546] [2021-08-26 04:45:52,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:45:52,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:52,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:45:52,663 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:45:52,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-26 04:45:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:45:54,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 93 conjunts are in the unsatisfiable core [2021-08-26 04:45:54,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:45:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:54,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693440546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:54,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:45:54,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2021-08-26 04:45:54,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340933681] [2021-08-26 04:45:54,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-08-26 04:45:54,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:45:54,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-08-26 04:45:54,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-08-26 04:45:54,742 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 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 04:45:54,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:45:54,823 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-08-26 04:45:54,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-08-26 04:45:54,824 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 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 98 [2021-08-26 04:45:54,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:45:54,824 INFO L225 Difference]: With dead ends: 104 [2021-08-26 04:45:54,824 INFO L226 Difference]: Without dead ends: 100 [2021-08-26 04:45:54,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2882.9ms TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-08-26 04:45:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-26 04:45:54,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-08-26 04:45:54,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 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 04:45:54,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2021-08-26 04:45:54,826 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2021-08-26 04:45:54,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:45:54,826 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2021-08-26 04:45:54,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 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 04:45:54,827 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2021-08-26 04:45:54,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-08-26 04:45:54,827 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:45:54,827 INFO L512 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:45:54,849 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-26 04:45:55,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:55,027 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:45:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:45:55,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1207520203, now seen corresponding path program 92 times [2021-08-26 04:45:55,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:45:55,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360195271] [2021-08-26 04:45:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:45:55,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:45:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:45:58,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:45:58,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:45:58,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360195271] [2021-08-26 04:45:58,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360195271] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:45:58,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671783939] [2021-08-26 04:45:58,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:45:58,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:45:58,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:45:58,072 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:45:58,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-26 04:45:59,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:45:59,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:45:59,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-26 04:45:59,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:46:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:00,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671783939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:00,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:46:00,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2021-08-26 04:46:00,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99279076] [2021-08-26 04:46:00,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-08-26 04:46:00,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:46:00,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-08-26 04:46:00,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-08-26 04:46:00,166 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 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 04:46:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:46:00,247 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2021-08-26 04:46:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-08-26 04:46:00,247 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 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 99 [2021-08-26 04:46:00,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:46:00,248 INFO L225 Difference]: With dead ends: 105 [2021-08-26 04:46:00,248 INFO L226 Difference]: Without dead ends: 101 [2021-08-26 04:46:00,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2868.7ms TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-08-26 04:46:00,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-26 04:46:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-08-26 04:46:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 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 04:46:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-08-26 04:46:00,251 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2021-08-26 04:46:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:46:00,251 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-08-26 04:46:00,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 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 04:46:00,251 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-08-26 04:46:00,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-26 04:46:00,252 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:46:00,252 INFO L512 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:46:00,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-26 04:46:00,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:46:00,453 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:46:00,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:46:00,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1219913965, now seen corresponding path program 93 times [2021-08-26 04:46:00,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:46:00,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704153338] [2021-08-26 04:46:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:46:00,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:46:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:46:03,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:03,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:46:03,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704153338] [2021-08-26 04:46:03,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704153338] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:03,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061582218] [2021-08-26 04:46:03,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:46:03,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:46:03,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:46:03,519 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:46:03,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-26 04:46:05,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-08-26 04:46:05,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:46:05,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 95 conjunts are in the unsatisfiable core [2021-08-26 04:46:05,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:46:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:05,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061582218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:05,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:46:05,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2021-08-26 04:46:05,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904982874] [2021-08-26 04:46:05,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-08-26 04:46:05,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:46:05,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-08-26 04:46:05,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-08-26 04:46:05,678 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 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 04:46:05,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:46:05,754 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-08-26 04:46:05,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-08-26 04:46:05,754 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 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 100 [2021-08-26 04:46:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:46:05,755 INFO L225 Difference]: With dead ends: 106 [2021-08-26 04:46:05,755 INFO L226 Difference]: Without dead ends: 102 [2021-08-26 04:46:05,755 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2884.3ms TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-08-26 04:46:05,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-08-26 04:46:05,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-08-26 04:46:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 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 04:46:05,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2021-08-26 04:46:05,758 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2021-08-26 04:46:05,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:46:05,758 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2021-08-26 04:46:05,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 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 04:46:05,758 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2021-08-26 04:46:05,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-08-26 04:46:05,758 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:46:05,758 INFO L512 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:46:05,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-26 04:46:05,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:46:05,959 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:46:05,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:46:05,959 INFO L82 PathProgramCache]: Analyzing trace with hash 839038155, now seen corresponding path program 94 times [2021-08-26 04:46:05,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:46:05,959 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377792572] [2021-08-26 04:46:05,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:46:05,959 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:46:05,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:46:09,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:09,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:46:09,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377792572] [2021-08-26 04:46:09,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377792572] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:09,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145471481] [2021-08-26 04:46:09,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:46:09,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:46:09,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:46:09,116 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:46:09,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-26 04:46:11,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:46:11,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:46:11,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 96 conjunts are in the unsatisfiable core [2021-08-26 04:46:11,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:46:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:11,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145471481] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:11,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:46:11,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2021-08-26 04:46:11,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471415201] [2021-08-26 04:46:11,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-08-26 04:46:11,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:46:11,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-08-26 04:46:11,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-08-26 04:46:11,342 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 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 04:46:11,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:46:11,416 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2021-08-26 04:46:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-26 04:46:11,417 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 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 101 [2021-08-26 04:46:11,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:46:11,417 INFO L225 Difference]: With dead ends: 107 [2021-08-26 04:46:11,417 INFO L226 Difference]: Without dead ends: 103 [2021-08-26 04:46:11,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2987.3ms TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-08-26 04:46:11,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-08-26 04:46:11,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-08-26 04:46:11,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 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 04:46:11,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-08-26 04:46:11,419 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2021-08-26 04:46:11,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:46:11,419 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-08-26 04:46:11,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 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 04:46:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-08-26 04:46:11,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-26 04:46:11,420 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:46:11,420 INFO L512 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:46:11,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-26 04:46:11,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-08-26 04:46:11,629 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:46:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:46:11,629 INFO L82 PathProgramCache]: Analyzing trace with hash 242044435, now seen corresponding path program 95 times [2021-08-26 04:46:11,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:46:11,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656403107] [2021-08-26 04:46:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:46:11,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:46:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:46:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:14,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:46:14,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656403107] [2021-08-26 04:46:14,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656403107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:14,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072178711] [2021-08-26 04:46:14,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 04:46:14,841 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:46:14,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:46:14,844 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:46:14,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-26 04:46:16,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-08-26 04:46:16,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:46:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 97 conjunts are in the unsatisfiable core [2021-08-26 04:46:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:46:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:17,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072178711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:17,086 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:46:17,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2021-08-26 04:46:17,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67298697] [2021-08-26 04:46:17,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-08-26 04:46:17,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:46:17,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-08-26 04:46:17,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-08-26 04:46:17,087 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 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 04:46:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:46:17,165 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-08-26 04:46:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-08-26 04:46:17,165 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 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 102 [2021-08-26 04:46:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:46:17,166 INFO L225 Difference]: With dead ends: 108 [2021-08-26 04:46:17,166 INFO L226 Difference]: Without dead ends: 104 [2021-08-26 04:46:17,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3041.4ms TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-08-26 04:46:17,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-26 04:46:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-08-26 04:46:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 103 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 04:46:17,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2021-08-26 04:46:17,168 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2021-08-26 04:46:17,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:46:17,168 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2021-08-26 04:46:17,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 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 04:46:17,168 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2021-08-26 04:46:17,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-08-26 04:46:17,168 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:46:17,168 INFO L512 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:46:17,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-26 04:46:17,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-26 04:46:17,377 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:46:17,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:46:17,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1084891701, now seen corresponding path program 96 times [2021-08-26 04:46:17,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:46:17,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199442790] [2021-08-26 04:46:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:46:17,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:46:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:46:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:20,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:46:20,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199442790] [2021-08-26 04:46:20,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199442790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:20,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765119209] [2021-08-26 04:46:20,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-26 04:46:20,672 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:46:20,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:46:20,673 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:46:20,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-26 04:46:22,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-08-26 04:46:22,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:46:22,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-26 04:46:22,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:46:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:22,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765119209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:22,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:46:22,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2021-08-26 04:46:22,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751958634] [2021-08-26 04:46:22,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-08-26 04:46:22,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:46:22,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-08-26 04:46:22,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-08-26 04:46:22,986 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 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 04:46:23,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:46:23,066 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2021-08-26 04:46:23,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-08-26 04:46:23,066 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 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) Word has length 103 [2021-08-26 04:46:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:46:23,067 INFO L225 Difference]: With dead ends: 109 [2021-08-26 04:46:23,067 INFO L226 Difference]: Without dead ends: 105 [2021-08-26 04:46:23,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3123.7ms TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-08-26 04:46:23,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-26 04:46:23,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-08-26 04:46:23,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 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 04:46:23,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-08-26 04:46:23,069 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2021-08-26 04:46:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:46:23,069 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-08-26 04:46:23,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 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 04:46:23,070 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-08-26 04:46:23,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-08-26 04:46:23,070 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:46:23,070 INFO L512 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:46:23,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-26 04:46:23,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:46:23,283 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:46:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:46:23,283 INFO L82 PathProgramCache]: Analyzing trace with hash 729761043, now seen corresponding path program 97 times [2021-08-26 04:46:23,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:46:23,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797972495] [2021-08-26 04:46:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:46:23,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:46:23,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:46:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:26,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:46:26,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797972495] [2021-08-26 04:46:26,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797972495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:26,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635142177] [2021-08-26 04:46:26,644 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-26 04:46:26,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:46:26,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:46:26,653 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:46:26,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-26 04:46:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:46:28,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 99 conjunts are in the unsatisfiable core [2021-08-26 04:46:28,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:46:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:28,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635142177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:28,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:46:28,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2021-08-26 04:46:28,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726581678] [2021-08-26 04:46:29,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-08-26 04:46:29,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:46:29,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-08-26 04:46:29,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-08-26 04:46:29,001 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 100 states, 100 states have (on average 1.04) internal successors, (104), 100 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 04:46:29,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:46:29,074 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-08-26 04:46:29,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-08-26 04:46:29,075 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.04) internal successors, (104), 100 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 104 [2021-08-26 04:46:29,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:46:29,075 INFO L225 Difference]: With dead ends: 110 [2021-08-26 04:46:29,075 INFO L226 Difference]: Without dead ends: 106 [2021-08-26 04:46:29,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3183.4ms TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-08-26 04:46:29,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-26 04:46:29,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-08-26 04:46:29,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 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 04:46:29,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2021-08-26 04:46:29,077 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2021-08-26 04:46:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:46:29,078 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2021-08-26 04:46:29,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.04) internal successors, (104), 100 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 04:46:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2021-08-26 04:46:29,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-08-26 04:46:29,078 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:46:29,078 INFO L512 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:46:29,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-26 04:46:29,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:46:29,286 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:46:29,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:46:29,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1149421259, now seen corresponding path program 98 times [2021-08-26 04:46:29,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:46:29,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623650772] [2021-08-26 04:46:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:46:29,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:46:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:46:32,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:32,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:46:32,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623650772] [2021-08-26 04:46:32,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623650772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:32,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894435455] [2021-08-26 04:46:32,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 04:46:32,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:46:32,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:46:32,757 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:46:32,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-26 04:46:34,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 04:46:34,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:46:34,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 100 conjunts are in the unsatisfiable core [2021-08-26 04:46:34,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:46:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:35,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894435455] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:35,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:46:35,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2021-08-26 04:46:35,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321976576] [2021-08-26 04:46:35,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-08-26 04:46:35,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:46:35,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-08-26 04:46:35,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-08-26 04:46:35,100 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 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 04:46:35,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:46:35,187 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2021-08-26 04:46:35,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-08-26 04:46:35,187 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 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 04:46:35,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:46:35,188 INFO L225 Difference]: With dead ends: 111 [2021-08-26 04:46:35,188 INFO L226 Difference]: Without dead ends: 107 [2021-08-26 04:46:35,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3282.2ms TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-08-26 04:46:35,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-26 04:46:35,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-08-26 04:46:35,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 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 04:46:35,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-08-26 04:46:35,190 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2021-08-26 04:46:35,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:46:35,191 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-08-26 04:46:35,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 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 04:46:35,191 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-08-26 04:46:35,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-26 04:46:35,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:46:35,191 INFO L512 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:46:35,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-26 04:46:35,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-26 04:46:35,401 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:46:35,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:46:35,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1273986067, now seen corresponding path program 99 times [2021-08-26 04:46:35,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:46:35,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534584765] [2021-08-26 04:46:35,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:46:35,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:46:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:46:38,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:38,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:46:38,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534584765] [2021-08-26 04:46:38,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534584765] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:38,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164333355] [2021-08-26 04:46:38,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 04:46:38,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:46:38,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:46:38,927 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:46:38,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-26 04:46:41,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2021-08-26 04:46:41,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:46:41,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 101 conjunts are in the unsatisfiable core [2021-08-26 04:46:41,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:46:41,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:41,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164333355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:41,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:46:41,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2021-08-26 04:46:41,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717052429] [2021-08-26 04:46:41,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-08-26 04:46:41,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:46:41,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-08-26 04:46:41,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-08-26 04:46:41,399 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 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 04:46:41,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:46:41,480 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-08-26 04:46:41,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-08-26 04:46:41,481 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 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 106 [2021-08-26 04:46:41,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:46:41,481 INFO L225 Difference]: With dead ends: 112 [2021-08-26 04:46:41,481 INFO L226 Difference]: Without dead ends: 108 [2021-08-26 04:46:41,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3327.0ms TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-08-26 04:46:41,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-26 04:46:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-08-26 04:46:41,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 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 04:46:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2021-08-26 04:46:41,484 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2021-08-26 04:46:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:46:41,484 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2021-08-26 04:46:41,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 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 04:46:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2021-08-26 04:46:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-08-26 04:46:41,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:46:41,485 INFO L512 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:46:41,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-08-26 04:46:41,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:46:41,701 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:46:41,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:46:41,701 INFO L82 PathProgramCache]: Analyzing trace with hash 840527819, now seen corresponding path program 100 times [2021-08-26 04:46:41,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:46:41,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765675602] [2021-08-26 04:46:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:46:41,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:46:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:46:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:46,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:46:46,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765675602] [2021-08-26 04:46:46,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765675602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:46,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340745911] [2021-08-26 04:46:46,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 04:46:46,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:46:46,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:46:46,216 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 04:46:46,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-26 04:46:48,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 04:46:48,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 04:46:48,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 205 conjunts are in the unsatisfiable core [2021-08-26 04:46:48,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:46:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:49,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340745911] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:46:49,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:46:49,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2021-08-26 04:46:49,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612797100] [2021-08-26 04:46:49,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-08-26 04:46:49,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:46:49,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-08-26 04:46:49,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=10712, Unknown=0, NotChecked=0, Total=10920 [2021-08-26 04:46:49,203 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 105 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 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 04:46:52,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:46:52,853 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2021-08-26 04:46:52,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-08-26 04:46:52,854 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 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 107 [2021-08-26 04:46:52,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:46:52,854 INFO L225 Difference]: With dead ends: 113 [2021-08-26 04:46:52,854 INFO L226 Difference]: Without dead ends: 109 [2021-08-26 04:46:52,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4286.6ms TimeCoverageRelationStatistics Valid=213, Invalid=10917, Unknown=0, NotChecked=0, Total=11130 [2021-08-26 04:46:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-26 04:46:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-08-26 04:46:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 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 04:46:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-08-26 04:46:52,858 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2021-08-26 04:46:52,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:46:52,858 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-08-26 04:46:52,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 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 04:46:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-08-26 04:46:52,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-08-26 04:46:52,859 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:46:52,859 INFO L512 BasicCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:46:52,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-26 04:46:53,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:46:53,079 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:46:53,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:46:53,079 INFO L82 PathProgramCache]: Analyzing trace with hash 288224019, now seen corresponding path program 101 times [2021-08-26 04:46:53,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:46:53,079 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602124749] [2021-08-26 04:46:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:46:53,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:46:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:46:56,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:46:56,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:46:56,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602124749] [2021-08-26 04:46:56,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602124749] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:46:56,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:46:56,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-08-26 04:46:56,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694189678] [2021-08-26 04:46:56,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-08-26 04:46:56,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:46:56,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-08-26 04:46:56,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-08-26 04:46:56,968 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 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 04:46:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:46:57,247 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2021-08-26 04:46:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-08-26 04:46:57,247 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 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 108 [2021-08-26 04:46:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:46:57,247 INFO L225 Difference]: With dead ends: 109 [2021-08-26 04:46:57,247 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 04:46:57,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3657.9ms TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-08-26 04:46:57,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 04:46:57,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 04:46:57,248 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 04:46:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 04:46:57,248 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2021-08-26 04:46:57,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:46:57,248 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 04:46:57,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 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 04:46:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 04:46:57,248 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 04:46:57,250 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 04:46:57,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-08-26 04:46:57,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 04:46:57,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 04:46:57,336 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 04:46:58,606 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 04:46:58,607 INFO L853 garLoopResultBuilder]: At program point L23-2(lines 23 26) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~i~0 32) (<= ULTIMATE.start_main_~j~0 64) (<= 64 ULTIMATE.start_main_~j~0) (<= 32 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 67) (<= 67 ULTIMATE.start_main_~i~0) (<= 134 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 134)) (and (<= ULTIMATE.start_main_~i~0 24) (<= 48 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 48) (<= 24 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 98) (<= 98 ULTIMATE.start_main_~i~0) (<= 196 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 196)) (and (<= 38 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 38) (<= 19 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 19)) (and (<= 8 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 16) (<= ULTIMATE.start_main_~i~0 8) (<= 16 ULTIMATE.start_main_~j~0)) (and (<= 114 ULTIMATE.start_main_~j~0) (<= 57 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 114) (<= ULTIMATE.start_main_~i~0 57)) (and (<= ULTIMATE.start_main_~j~0 128) (<= 128 ULTIMATE.start_main_~j~0) (<= 64 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 64)) (and (<= ULTIMATE.start_main_~j~0 52) (<= 26 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 26) (<= 52 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 178) (<= 178 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 89) (<= 89 ULTIMATE.start_main_~i~0)) (and (<= 28 ULTIMATE.start_main_~j~0) (<= 14 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 28) (<= ULTIMATE.start_main_~i~0 14)) (and (<= 192 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 96) (<= ULTIMATE.start_main_~j~0 192) (<= 96 ULTIMATE.start_main_~i~0)) (and (<= 60 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 60) (<= ULTIMATE.start_main_~j~0 120) (<= 120 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 69) (<= ULTIMATE.start_main_~j~0 138) (<= 69 ULTIMATE.start_main_~i~0) (<= 138 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 172) (<= ULTIMATE.start_main_~i~0 86) (<= 86 ULTIMATE.start_main_~i~0) (<= 172 ULTIMATE.start_main_~j~0)) (and (<= 148 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 74) (<= ULTIMATE.start_main_~j~0 148) (<= 74 ULTIMATE.start_main_~i~0)) (and (<= 136 ULTIMATE.start_main_~j~0) (<= 68 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 68) (<= ULTIMATE.start_main_~j~0 136)) (and (<= ULTIMATE.start_main_~j~0 20) (<= ULTIMATE.start_main_~i~0 10) (<= 10 ULTIMATE.start_main_~i~0) (<= 20 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 46) (<= 92 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 92) (<= 46 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 102) (<= 102 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 51) (<= 51 ULTIMATE.start_main_~i~0)) (and (<= 56 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 56) (<= ULTIMATE.start_main_~j~0 112) (<= 112 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 108) (<= ULTIMATE.start_main_~i~0 54) (<= 108 ULTIMATE.start_main_~j~0) (<= 54 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 44) (<= ULTIMATE.start_main_~j~0 88) (<= 44 ULTIMATE.start_main_~i~0) (<= 88 ULTIMATE.start_main_~j~0)) (and (<= 75 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 150) (<= ULTIMATE.start_main_~i~0 75) (<= 150 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 91) (<= 182 ULTIMATE.start_main_~j~0) (<= 91 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 182)) (and (<= 6 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 12) (<= ULTIMATE.start_main_~i~0 6) (<= 12 ULTIMATE.start_main_~j~0)) (and (<= 194 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 194) (<= 97 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 97)) (and (<= 188 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 94) (<= ULTIMATE.start_main_~j~0 188) (<= 94 ULTIMATE.start_main_~i~0)) (and (<= 180 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 180) (<= 90 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 90)) (and (<= 5 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 5) (<= ULTIMATE.start_main_~j~0 10) (<= 10 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 84) (<= 84 ULTIMATE.start_main_~j~0) (<= 42 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 42)) (and (<= ULTIMATE.start_main_~i~0 11) (<= 22 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 22) (<= 11 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 84) (<= 168 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 168) (<= 84 ULTIMATE.start_main_~i~0)) (and (<= 66 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 33) (<= ULTIMATE.start_main_~j~0 66) (<= 33 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 85) (<= ULTIMATE.start_main_~j~0 170) (<= 85 ULTIMATE.start_main_~i~0) (<= 170 ULTIMATE.start_main_~j~0)) (and (<= 34 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 17) (<= ULTIMATE.start_main_~j~0 34) (<= 17 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 122) (<= 61 ULTIMATE.start_main_~i~0) (<= 122 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 61)) (and (<= 72 ULTIMATE.start_main_~j~0) (<= 36 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 72) (<= ULTIMATE.start_main_~i~0 36)) (and (<= 174 ULTIMATE.start_main_~j~0) (<= 87 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 87) (<= ULTIMATE.start_main_~j~0 174)) (and (<= ULTIMATE.start_main_~i~0 70) (<= 140 ULTIMATE.start_main_~j~0) (<= 70 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 140)) (and (<= 38 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 38) (<= ULTIMATE.start_main_~j~0 76) (<= 76 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 14) (<= ULTIMATE.start_main_~i~0 7) (<= 14 ULTIMATE.start_main_~j~0) (<= 7 ULTIMATE.start_main_~i~0)) (and (<= 82 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 82) (<= 164 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 164)) (and (<= 73 ULTIMATE.start_main_~i~0) (<= 146 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 73) (<= ULTIMATE.start_main_~j~0 146)) (and (<= ULTIMATE.start_main_~i~0 1) (<= 2 ULTIMATE.start_main_~j~0) (<= 1 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 2)) (and (<= ULTIMATE.start_main_~j~0 26) (<= 13 ULTIMATE.start_main_~i~0) (<= 26 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 13)) (and (<= 2 ULTIMATE.start_main_~i~0) (<= 4 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 2) (<= ULTIMATE.start_main_~j~0 4)) (and (<= 130 ULTIMATE.start_main_~j~0) (<= 65 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 65) (<= ULTIMATE.start_main_~j~0 130)) (and (<= ULTIMATE.start_main_~j~0 142) (<= 142 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 71) (<= 71 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 110) (<= 110 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 55) (<= 55 ULTIMATE.start_main_~i~0)) (and (<= 190 ULTIMATE.start_main_~j~0) (<= 95 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 95) (<= ULTIMATE.start_main_~j~0 190)) (and (<= 24 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 24) (<= ULTIMATE.start_main_~i~0 12) (<= 12 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 86) (<= 86 ULTIMATE.start_main_~j~0) (<= 43 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 43)) (and (<= ULTIMATE.start_main_~i~0 34) (<= 34 ULTIMATE.start_main_~i~0) (<= 68 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 68)) (and (<= ULTIMATE.start_main_~i~0 20) (<= 20 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 40) (<= 40 ULTIMATE.start_main_~j~0)) (and (<= 41 ULTIMATE.start_main_~i~0) (<= 82 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 41) (<= ULTIMATE.start_main_~j~0 82)) (and (<= ULTIMATE.start_main_~j~0 106) (<= ULTIMATE.start_main_~i~0 53) (<= 53 ULTIMATE.start_main_~i~0) (<= 106 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 50) (<= ULTIMATE.start_main_~j~0 100) (<= 100 ULTIMATE.start_main_~j~0) (<= 50 ULTIMATE.start_main_~i~0)) (and (<= 45 ULTIMATE.start_main_~i~0) (<= 90 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 90) (<= ULTIMATE.start_main_~i~0 45)) (and (<= ULTIMATE.start_main_~j~0 62) (<= 31 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 31) (<= 62 ULTIMATE.start_main_~j~0)) (and (<= 80 ULTIMATE.start_main_~i~0) (<= 160 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 160) (<= ULTIMATE.start_main_~i~0 80)) (and (<= 32 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 16) (<= ULTIMATE.start_main_~j~0 32) (<= 16 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 79) (<= 158 ULTIMATE.start_main_~j~0) (<= 79 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 158)) (and (<= ULTIMATE.start_main_~j~0 74) (<= ULTIMATE.start_main_~i~0 37) (<= 74 ULTIMATE.start_main_~j~0) (<= 37 ULTIMATE.start_main_~i~0)) (and (<= 154 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 77) (<= 77 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 154)) (and (<= 80 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 80) (<= 40 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 40)) (and (<= 3 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 6) (<= ULTIMATE.start_main_~i~0 3) (<= 6 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 78) (<= ULTIMATE.start_main_~j~0 156) (<= 156 ULTIMATE.start_main_~j~0) (<= 78 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 42) (<= 42 ULTIMATE.start_main_~j~0) (<= 21 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 21)) (and (<= ULTIMATE.start_main_~j~0 116) (<= 116 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 58) (<= 58 ULTIMATE.start_main_~i~0)) (and (<= 162 ULTIMATE.start_main_~j~0) (<= 81 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 81) (<= ULTIMATE.start_main_~j~0 162)) (and (<= ULTIMATE.start_main_~i~0 29) (<= 58 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 58) (<= 29 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 83) (<= 83 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 166) (<= 166 ULTIMATE.start_main_~j~0)) (and (<= 96 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 96) (<= 48 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 48)) (and (<= ULTIMATE.start_main_~j~0 186) (<= 186 ULTIMATE.start_main_~j~0) (<= 93 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 93)) (and (<= 44 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 22) (<= ULTIMATE.start_main_~j~0 44) (<= 22 ULTIMATE.start_main_~i~0)) (and (<= 46 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 46) (<= 23 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 23)) (and (<= 36 ULTIMATE.start_main_~j~0) (<= 18 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 36) (<= ULTIMATE.start_main_~i~0 18)) (and (<= ULTIMATE.start_main_~j~0 70) (<= ULTIMATE.start_main_~i~0 35) (<= 35 ULTIMATE.start_main_~i~0) (<= 70 ULTIMATE.start_main_~j~0)) (and (<= 78 ULTIMATE.start_main_~j~0) (<= 39 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 39) (<= ULTIMATE.start_main_~j~0 78)) (and (<= 54 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 27) (<= 27 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 54)) (and (<= ULTIMATE.start_main_~i~0 66) (<= 132 ULTIMATE.start_main_~j~0) (<= 66 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 132)) (and (<= 15 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 15) (<= 30 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 30)) (and (<= 144 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 144) (<= 72 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 72)) (and (<= ULTIMATE.start_main_~j~0 184) (<= ULTIMATE.start_main_~i~0 92) (<= 184 ULTIMATE.start_main_~j~0) (<= 92 ULTIMATE.start_main_~i~0)) (and (<= 49 ULTIMATE.start_main_~i~0) (<= 98 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 98) (<= ULTIMATE.start_main_~i~0 49)) (and (<= ULTIMATE.start_main_~i~0 76) (<= ULTIMATE.start_main_~j~0 152) (<= 152 ULTIMATE.start_main_~j~0) (<= 76 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 126) (<= ULTIMATE.start_main_~i~0 63) (<= 63 ULTIMATE.start_main_~i~0) (<= 126 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 0) (<= 0 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 0) (<= 0 ULTIMATE.start_main_~j~0)) (and (<= 118 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 59) (<= 59 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 118)) (and (<= ULTIMATE.start_main_~i~0 88) (<= 88 ULTIMATE.start_main_~i~0) (<= 176 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 176)) (and (<= 4 ULTIMATE.start_main_~i~0) (<= 8 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 8) (<= ULTIMATE.start_main_~i~0 4)) (and (<= 104 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 104) (<= 52 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 52)) (and (<= 50 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 50) (<= ULTIMATE.start_main_~i~0 25) (<= 25 ULTIMATE.start_main_~i~0)) (and (<= 198 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 99) (<= ULTIMATE.start_main_~j~0 198) (<= 99 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 28) (<= 28 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 56) (<= 56 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 9) (<= 18 ULTIMATE.start_main_~j~0) (<= 9 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 18)) (and (<= 30 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 30) (<= 60 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 60)) (and (<= 94 ULTIMATE.start_main_~j~0) (<= 47 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 94) (<= ULTIMATE.start_main_~i~0 47)) (and (< 199 ULTIMATE.start_main_~j~0) (<= 100 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 200)) (and (<= 62 ULTIMATE.start_main_~i~0) (<= 124 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 124) (<= ULTIMATE.start_main_~i~0 62))) [2021-08-26 04:46:58,608 INFO L857 garLoopResultBuilder]: For program point L23-3(lines 23 26) no Hoare annotation was computed. [2021-08-26 04:46:58,608 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-08-26 04:46:58,608 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 04:46:58,608 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 04:46:58,608 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 04:46:58,608 INFO L860 garLoopResultBuilder]: At program point L28(lines 19 29) the Hoare annotation is: true [2021-08-26 04:46:58,608 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-08-26 04:46:58,608 INFO L857 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2021-08-26 04:46:58,608 INFO L857 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-08-26 04:46:58,608 INFO L857 garLoopResultBuilder]: For program point L14(lines 14 18) no Hoare annotation was computed. [2021-08-26 04:46:58,611 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 04:46:58,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 04:46:58 BoogieIcfgContainer [2021-08-26 04:46:58,638 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 04:46:58,639 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 04:46:58,639 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 04:46:58,639 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 04:46:58,639 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:42:37" (3/4) ... [2021-08-26 04:46:58,641 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 04:46:58,651 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-26 04:46:58,652 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 04:46:58,652 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 04:46:58,652 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 04:46:58,683 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 04:46:58,683 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 04:46:58,684 INFO L168 Benchmark]: Toolchain (without parser) took 261752.65 ms. Allocated memory was 56.6 MB in the beginning and 1.1 GB in the end (delta: 1.1 GB). Free memory was 35.9 MB in the beginning and 884.0 MB in the end (delta: -848.1 MB). Peak memory consumption was 211.1 MB. Max. memory is 16.1 GB. [2021-08-26 04:46:58,685 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 56.6 MB. Free memory was 39.3 MB in the beginning and 39.3 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 04:46:58,686 INFO L168 Benchmark]: CACSL2BoogieTranslator took 151.85 ms. Allocated memory is still 56.6 MB. Free memory was 35.7 MB in the beginning and 40.2 MB in the end (delta: -4.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 04:46:58,686 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.60 ms. Allocated memory is still 56.6 MB. Free memory was 40.2 MB in the beginning and 38.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 04:46:58,686 INFO L168 Benchmark]: Boogie Preprocessor took 21.51 ms. Allocated memory is still 56.6 MB. Free memory was 38.7 MB in the beginning and 37.8 MB in the end (delta: 917.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 04:46:58,687 INFO L168 Benchmark]: RCFGBuilder took 284.63 ms. Allocated memory is still 56.6 MB. Free memory was 37.7 MB in the beginning and 26.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 04:46:58,687 INFO L168 Benchmark]: TraceAbstraction took 261215.57 ms. Allocated memory was 69.2 MB in the beginning and 1.1 GB in the end (delta: 1.0 GB). Free memory was 52.4 MB in the beginning and 887.2 MB in the end (delta: -834.7 MB). Peak memory consumption was 798.4 MB. Max. memory is 16.1 GB. [2021-08-26 04:46:58,687 INFO L168 Benchmark]: Witness Printer took 44.38 ms. Allocated memory is still 1.1 GB. Free memory was 887.2 MB in the beginning and 884.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 04:46:58,689 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 56.6 MB. Free memory was 39.3 MB in the beginning and 39.3 MB in the end (delta: 42.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 151.85 ms. Allocated memory is still 56.6 MB. Free memory was 35.7 MB in the beginning and 40.2 MB in the end (delta: -4.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.60 ms. Allocated memory is still 56.6 MB. Free memory was 40.2 MB in the beginning and 38.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.51 ms. Allocated memory is still 56.6 MB. Free memory was 38.7 MB in the beginning and 37.8 MB in the end (delta: 917.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 284.63 ms. Allocated memory is still 56.6 MB. Free memory was 37.7 MB in the beginning and 26.8 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 261215.57 ms. Allocated memory was 69.2 MB in the beginning and 1.1 GB in the end (delta: 1.0 GB). Free memory was 52.4 MB in the beginning and 887.2 MB in the end (delta: -834.7 MB). Peak memory consumption was 798.4 MB. Max. memory is 16.1 GB. * Witness Printer took 44.38 ms. Allocated memory is still 1.1 GB. Free memory was 887.2 MB in the beginning and 884.0 MB in the end (delta: 3.1 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: 16]: 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, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 261139.5ms, OverallIterations: 103, TraceHistogramMax: 101, EmptinessCheckTime: 37.6ms, AutomataDifference: 8608.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1354.9ms, InitialAbstractionConstructionTime: 8.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 722 SDtfs, 1 SDslu, 2273 SDs, 0 SdLazy, 17320 SolverSat, 420 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5551.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11211 GetRequests, 5954 SyntacticMatches, 2 SemanticMatches, 5255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 122685.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=102, InterpolantAutomatonStates: 5459, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 196.5ms AutomataMinimizationTime, 103 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 104 NumberOfFragments, 1312 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 83.2ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 1264.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 1239.3ms SsaConstructionTime, 5135.8ms SatisfiabilityAnalysisTime, 147575.3ms InterpolantComputationTime, 11622 NumberOfCodeBlocks, 11622 NumberOfCodeBlocksAsserted, 1495 NumberOfCheckSat, 11419 ConstructedInterpolants, 0 QuantifiedInterpolants, 33048 SizeOfPredicates, 2 NumberOfNonLiveVariables, 29750 ConjunctsInSsa, 5353 ConjunctsInUnsatCore, 203 InterpolantComputations, 3 PerfectInterpolantSequences, 5151/348551 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: 23]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((i <= 32 && j <= 64) && 64 <= j) && 32 <= i) || (((i <= 67 && 67 <= i) && 134 <= j) && j <= 134)) || (((i <= 24 && 48 <= j) && j <= 48) && 24 <= i)) || (((i <= 98 && 98 <= i) && 196 <= j) && j <= 196)) || (((38 <= j && j <= 38) && 19 <= i) && i <= 19)) || (((8 <= i && j <= 16) && i <= 8) && 16 <= j)) || (((114 <= j && 57 <= i) && j <= 114) && i <= 57)) || (((j <= 128 && 128 <= j) && 64 <= i) && i <= 64)) || (((j <= 52 && 26 <= i) && i <= 26) && 52 <= j)) || (((j <= 178 && 178 <= j) && i <= 89) && 89 <= i)) || (((28 <= j && 14 <= i) && j <= 28) && i <= 14)) || (((192 <= j && i <= 96) && j <= 192) && 96 <= i)) || (((60 <= i && i <= 60) && j <= 120) && 120 <= j)) || (((i <= 69 && j <= 138) && 69 <= i) && 138 <= j)) || (((j <= 172 && i <= 86) && 86 <= i) && 172 <= j)) || (((148 <= j && i <= 74) && j <= 148) && 74 <= i)) || (((136 <= j && 68 <= i) && i <= 68) && j <= 136)) || (((j <= 20 && i <= 10) && 10 <= i) && 20 <= j)) || (((i <= 46 && 92 <= j) && j <= 92) && 46 <= i)) || (((j <= 102 && 102 <= j) && i <= 51) && 51 <= i)) || (((56 <= i && i <= 56) && j <= 112) && 112 <= j)) || (((j <= 108 && i <= 54) && 108 <= j) && 54 <= i)) || (((i <= 44 && j <= 88) && 44 <= i) && 88 <= j)) || (((75 <= i && j <= 150) && i <= 75) && 150 <= j)) || (((i <= 91 && 182 <= j) && 91 <= i) && j <= 182)) || (((6 <= i && j <= 12) && i <= 6) && 12 <= j)) || (((194 <= j && j <= 194) && 97 <= i) && i <= 97)) || (((188 <= j && i <= 94) && j <= 188) && 94 <= i)) || (((180 <= j && j <= 180) && 90 <= i) && i <= 90)) || (((5 <= i && i <= 5) && j <= 10) && 10 <= j)) || (((j <= 84 && 84 <= j) && 42 <= i) && i <= 42)) || (((i <= 11 && 22 <= j) && j <= 22) && 11 <= i)) || (((i <= 84 && 168 <= j) && j <= 168) && 84 <= i)) || (((66 <= j && i <= 33) && j <= 66) && 33 <= i)) || (((i <= 85 && j <= 170) && 85 <= i) && 170 <= j)) || (((34 <= j && i <= 17) && j <= 34) && 17 <= i)) || (((j <= 122 && 61 <= i) && 122 <= j) && i <= 61)) || (((72 <= j && 36 <= i) && j <= 72) && i <= 36)) || (((174 <= j && 87 <= i) && i <= 87) && j <= 174)) || (((i <= 70 && 140 <= j) && 70 <= i) && j <= 140)) || (((38 <= i && i <= 38) && j <= 76) && 76 <= j)) || (((j <= 14 && i <= 7) && 14 <= j) && 7 <= i)) || (((82 <= i && i <= 82) && 164 <= j) && j <= 164)) || (((73 <= i && 146 <= j) && i <= 73) && j <= 146)) || (((i <= 1 && 2 <= j) && 1 <= i) && j <= 2)) || (((j <= 26 && 13 <= i) && 26 <= j) && i <= 13)) || (((2 <= i && 4 <= j) && i <= 2) && j <= 4)) || (((130 <= j && 65 <= i) && i <= 65) && j <= 130)) || (((j <= 142 && 142 <= j) && i <= 71) && 71 <= i)) || (((j <= 110 && 110 <= j) && i <= 55) && 55 <= i)) || (((190 <= j && 95 <= i) && i <= 95) && j <= 190)) || (((24 <= j && j <= 24) && i <= 12) && 12 <= i)) || (((j <= 86 && 86 <= j) && 43 <= i) && i <= 43)) || (((i <= 34 && 34 <= i) && 68 <= j) && j <= 68)) || (((i <= 20 && 20 <= i) && j <= 40) && 40 <= j)) || (((41 <= i && 82 <= j) && i <= 41) && j <= 82)) || (((j <= 106 && i <= 53) && 53 <= i) && 106 <= j)) || (((i <= 50 && j <= 100) && 100 <= j) && 50 <= i)) || (((45 <= i && 90 <= j) && j <= 90) && i <= 45)) || (((j <= 62 && 31 <= i) && i <= 31) && 62 <= j)) || (((80 <= i && 160 <= j) && j <= 160) && i <= 80)) || (((32 <= j && i <= 16) && j <= 32) && 16 <= i)) || (((i <= 79 && 158 <= j) && 79 <= i) && j <= 158)) || (((j <= 74 && i <= 37) && 74 <= j) && 37 <= i)) || (((154 <= j && i <= 77) && 77 <= i) && j <= 154)) || (((80 <= j && j <= 80) && 40 <= i) && i <= 40)) || (((3 <= i && j <= 6) && i <= 3) && 6 <= j)) || (((i <= 78 && j <= 156) && 156 <= j) && 78 <= i)) || (((j <= 42 && 42 <= j) && 21 <= i) && i <= 21)) || (((j <= 116 && 116 <= j) && i <= 58) && 58 <= i)) || (((162 <= j && 81 <= i) && i <= 81) && j <= 162)) || (((i <= 29 && 58 <= j) && j <= 58) && 29 <= i)) || (((i <= 83 && 83 <= i) && j <= 166) && 166 <= j)) || (((96 <= j && j <= 96) && 48 <= i) && i <= 48)) || (((j <= 186 && 186 <= j) && 93 <= i) && i <= 93)) || (((44 <= j && i <= 22) && j <= 44) && 22 <= i)) || (((46 <= j && j <= 46) && 23 <= i) && i <= 23)) || (((36 <= j && 18 <= i) && j <= 36) && i <= 18)) || (((j <= 70 && i <= 35) && 35 <= i) && 70 <= j)) || (((78 <= j && 39 <= i) && i <= 39) && j <= 78)) || (((54 <= j && i <= 27) && 27 <= i) && j <= 54)) || (((i <= 66 && 132 <= j) && 66 <= i) && j <= 132)) || (((15 <= i && i <= 15) && 30 <= j) && j <= 30)) || (((144 <= j && j <= 144) && 72 <= i) && i <= 72)) || (((j <= 184 && i <= 92) && 184 <= j) && 92 <= i)) || (((49 <= i && 98 <= j) && j <= 98) && i <= 49)) || (((i <= 76 && j <= 152) && 152 <= j) && 76 <= i)) || (((j <= 126 && i <= 63) && 63 <= i) && 126 <= j)) || (((j <= 0 && 0 <= i) && i <= 0) && 0 <= j)) || (((118 <= j && i <= 59) && 59 <= i) && j <= 118)) || (((i <= 88 && 88 <= i) && 176 <= j) && j <= 176)) || (((4 <= i && 8 <= j) && j <= 8) && i <= 4)) || (((104 <= j && j <= 104) && 52 <= i) && i <= 52)) || (((50 <= j && j <= 50) && i <= 25) && 25 <= i)) || (((198 <= j && i <= 99) && j <= 198) && 99 <= i)) || (((i <= 28 && 28 <= i) && j <= 56) && 56 <= j)) || (((i <= 9 && 18 <= j) && 9 <= i) && j <= 18)) || (((30 <= i && i <= 30) && 60 <= j) && j <= 60)) || (((94 <= j && 47 <= i) && j <= 94) && i <= 47)) || ((199 < j && 100 <= i) && j <= 200)) || (((62 <= i && 124 <= j) && j <= 124) && i <= 62) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-26 04:46:58,728 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 0 Received shutdown request...