./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/triangular-longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 997cd7c3 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/pthread/triangular-longest-2.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 faf61a04ec090f6b1743a12583eb9c9759e6ed3e 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Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-997cd7c-m [2021-09-22 14:25:30,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-09-22 14:25:30,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-09-22 14:25:30,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-09-22 14:25:30,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-09-22 14:25:30,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-09-22 14:25:30,121 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-09-22 14:25:30,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-09-22 14:25:30,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-09-22 14:25:30,129 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-09-22 14:25:30,130 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-09-22 14:25:30,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-09-22 14:25:30,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-09-22 14:25:30,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-09-22 14:25:30,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-09-22 14:25:30,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-09-22 14:25:30,139 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-09-22 14:25:30,140 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-09-22 14:25:30,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-09-22 14:25:30,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-09-22 14:25:30,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-09-22 14:25:30,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-09-22 14:25:30,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-09-22 14:25:30,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-09-22 14:25:30,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-09-22 14:25:30,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-09-22 14:25:30,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-09-22 14:25:30,155 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-09-22 14:25:30,156 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-09-22 14:25:30,156 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-09-22 14:25:30,156 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-09-22 14:25:30,157 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-09-22 14:25:30,158 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-09-22 14:25:30,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-09-22 14:25:30,159 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-09-22 14:25:30,160 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-09-22 14:25:30,160 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-09-22 14:25:30,160 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-09-22 14:25:30,160 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-09-22 14:25:30,162 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-09-22 14:25:30,162 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-09-22 14:25:30,163 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-09-22 14:25:30,190 INFO L113 SettingsManager]: Loading preferences was successful [2021-09-22 14:25:30,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-09-22 14:25:30,191 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-09-22 14:25:30,191 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-09-22 14:25:30,192 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-09-22 14:25:30,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-09-22 14:25:30,193 INFO L138 SettingsManager]: * Use SBE=true [2021-09-22 14:25:30,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-09-22 14:25:30,193 INFO L138 SettingsManager]: * sizeof long=4 [2021-09-22 14:25:30,193 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-09-22 14:25:30,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-09-22 14:25:30,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-09-22 14:25:30,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-09-22 14:25:30,195 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-09-22 14:25:30,195 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-09-22 14:25:30,195 INFO L138 SettingsManager]: * sizeof long double=12 [2021-09-22 14:25:30,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-09-22 14:25:30,195 INFO L138 SettingsManager]: * Use constant arrays=true [2021-09-22 14:25:30,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-09-22 14:25:30,196 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-09-22 14:25:30,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-09-22 14:25:30,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-09-22 14:25:30,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-09-22 14:25:30,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-09-22 14:25:30,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-09-22 14:25:30,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-09-22 14:25:30,197 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-09-22 14:25:30,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-09-22 14:25:30,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-09-22 14:25:30,197 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-09-22 14:25:30,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faf61a04ec090f6b1743a12583eb9c9759e6ed3e [2021-09-22 14:25:30,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-09-22 14:25:30,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-09-22 14:25:30,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-09-22 14:25:30,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-09-22 14:25:30,484 INFO L275 PluginConnector]: CDTParser initialized [2021-09-22 14:25:30,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longest-2.i [2021-09-22 14:25:30,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8314d56a6/a4e4d97bef144b2d8f26e5b2d006a412/FLAG3f0cb9d1e [2021-09-22 14:25:30,987 INFO L306 CDTParser]: Found 1 translation units. [2021-09-22 14:25:30,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longest-2.i [2021-09-22 14:25:31,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8314d56a6/a4e4d97bef144b2d8f26e5b2d006a412/FLAG3f0cb9d1e [2021-09-22 14:25:31,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8314d56a6/a4e4d97bef144b2d8f26e5b2d006a412 [2021-09-22 14:25:31,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-09-22 14:25:31,317 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-09-22 14:25:31,318 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-09-22 14:25:31,318 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-09-22 14:25:31,326 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-09-22 14:25:31,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.09 02:25:31" (1/1) ... [2021-09-22 14:25:31,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29f60127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:31, skipping insertion in model container [2021-09-22 14:25:31,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.09 02:25:31" (1/1) ... [2021-09-22 14:25:31,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-09-22 14:25:31,367 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-09-22 14:25:31,634 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/pthread/triangular-longest-2.i[30964,30977] [2021-09-22 14:25:31,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-09-22 14:25:31,647 INFO L203 MainTranslator]: Completed pre-run [2021-09-22 14:25:31,676 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/pthread/triangular-longest-2.i[30964,30977] [2021-09-22 14:25:31,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-09-22 14:25:31,706 INFO L208 MainTranslator]: Completed translation [2021-09-22 14:25:31,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:31 WrapperNode [2021-09-22 14:25:31,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-09-22 14:25:31,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-09-22 14:25:31,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-09-22 14:25:31,708 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-09-22 14:25:31,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:31" (1/1) ... [2021-09-22 14:25:31,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:31" (1/1) ... [2021-09-22 14:25:31,748 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-09-22 14:25:31,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-09-22 14:25:31,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-09-22 14:25:31,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-09-22 14:25:31,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:31" (1/1) ... [2021-09-22 14:25:31,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:31" (1/1) ... [2021-09-22 14:25:31,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:31" (1/1) ... [2021-09-22 14:25:31,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:31" (1/1) ... [2021-09-22 14:25:31,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:31" (1/1) ... [2021-09-22 14:25:31,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:31" (1/1) ... [2021-09-22 14:25:31,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:31" (1/1) ... [2021-09-22 14:25:31,778 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-09-22 14:25:31,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-09-22 14:25:31,781 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-09-22 14:25:31,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-09-22 14:25:31,782 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:31" (1/1) ... [2021-09-22 14:25:31,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-09-22 14:25:31,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:31,802 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) [2021-09-22 14:25:31,822 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 [2021-09-22 14:25:31,829 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-09-22 14:25:31,829 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-09-22 14:25:31,829 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-09-22 14:25:31,829 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-09-22 14:25:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-09-22 14:25:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-09-22 14:25:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-09-22 14:25:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-09-22 14:25:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-09-22 14:25:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-09-22 14:25:31,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-09-22 14:25:31,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-09-22 14:25:31,831 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-09-22 14:25:32,021 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-09-22 14:25:32,021 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-09-22 14:25:32,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.09 02:25:32 BoogieIcfgContainer [2021-09-22 14:25:32,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-09-22 14:25:32,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-09-22 14:25:32,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-09-22 14:25:32,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-09-22 14:25:32,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.09 02:25:31" (1/3) ... [2021-09-22 14:25:32,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9209e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.09 02:25:32, skipping insertion in model container [2021-09-22 14:25:32,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.09 02:25:31" (2/3) ... [2021-09-22 14:25:32,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c9209e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.09 02:25:32, skipping insertion in model container [2021-09-22 14:25:32,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.09 02:25:32" (3/3) ... [2021-09-22 14:25:32,028 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2021-09-22 14:25:32,030 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-09-22 14:25:32,031 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-09-22 14:25:32,031 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-09-22 14:25:32,031 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-09-22 14:25:32,054 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,055 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,055 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,055 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,055 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,055 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,055 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,056 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,056 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,056 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,056 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,056 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,057 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,057 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,057 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,057 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,057 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,057 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,058 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,058 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,058 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,058 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,058 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,058 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,059 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,059 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,059 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,059 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,060 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,060 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,060 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,060 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,061 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,061 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,061 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,061 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,061 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,061 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,062 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,062 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,062 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,062 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,062 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,062 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,063 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,063 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,063 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,063 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,063 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,063 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,064 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,064 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,066 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,066 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,066 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,066 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,066 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,066 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,070 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,070 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,070 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,070 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,070 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,070 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-09-22 14:25:32,072 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-09-22 14:25:32,108 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-09-22 14:25:32,113 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 [2021-09-22 14:25:32,113 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-09-22 14:25:32,125 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-09-22 14:25:32,131 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 66 transitions, 142 flow [2021-09-22 14:25:32,134 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 66 transitions, 142 flow [2021-09-22 14:25:32,135 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 66 transitions, 142 flow [2021-09-22 14:25:32,177 INFO L129 PetriNetUnfolder]: 5/64 cut-off events. [2021-09-22 14:25:32,179 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-09-22 14:25:32,182 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 5/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2021-09-22 14:25:32,185 INFO L116 LiptonReduction]: Number of co-enabled transitions 1078 [2021-09-22 14:25:34,149 INFO L131 LiptonReduction]: Checked pairs total: 1010 [2021-09-22 14:25:34,149 INFO L133 LiptonReduction]: Total number of compositions: 58 [2021-09-22 14:25:34,156 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2021-09-22 14:25:34,163 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 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) [2021-09-22 14:25:34,169 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 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) [2021-09-22 14:25:34,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-09-22 14:25:34,180 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:34,180 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-09-22 14:25:34,181 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:34,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:34,189 INFO L82 PathProgramCache]: Analyzing trace with hash -776411381, now seen corresponding path program 1 times [2021-09-22 14:25:34,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:34,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776285123] [2021-09-22 14:25:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:34,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:34,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:34,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:34,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776285123] [2021-09-22 14:25:34,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776285123] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:25:34,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:25:34,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-09-22 14:25:34,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366065188] [2021-09-22 14:25:34,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-09-22 14:25:34,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:34,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-09-22 14:25:34,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-09-22 14:25:34,460 INFO L87 Difference]: Start difference. First operand has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 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) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:34,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:34,494 INFO L93 Difference]: Finished difference Result 44 states and 107 transitions. [2021-09-22 14:25:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-09-22 14:25:34,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-09-22 14:25:34,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:34,500 INFO L225 Difference]: With dead ends: 44 [2021-09-22 14:25:34,500 INFO L226 Difference]: Without dead ends: 38 [2021-09-22 14:25:34,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-09-22 14:25:34,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-09-22 14:25:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-09-22 14:25:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 37 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) [2021-09-22 14:25:34,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2021-09-22 14:25:34,525 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 6 [2021-09-22 14:25:34,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:34,526 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2021-09-22 14:25:34,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:34,526 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2021-09-22 14:25:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-09-22 14:25:34,527 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:34,527 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:34,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-09-22 14:25:34,527 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:34,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:34,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1192430633, now seen corresponding path program 1 times [2021-09-22 14:25:34,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:34,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537132306] [2021-09-22 14:25:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:34,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:34,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:34,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:34,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537132306] [2021-09-22 14:25:34,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537132306] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:25:34,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:25:34,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-09-22 14:25:34,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327134037] [2021-09-22 14:25:34,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-09-22 14:25:34,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:34,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-09-22 14:25:34,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-09-22 14:25:34,629 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand has 5 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) [2021-09-22 14:25:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:34,661 INFO L93 Difference]: Finished difference Result 64 states and 150 transitions. [2021-09-22 14:25:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-09-22 14:25:34,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 [2021-09-22 14:25:34,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:34,663 INFO L225 Difference]: With dead ends: 64 [2021-09-22 14:25:34,663 INFO L226 Difference]: Without dead ends: 50 [2021-09-22 14:25:34,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-09-22 14:25:34,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-09-22 14:25:34,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2021-09-22 14:25:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 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) [2021-09-22 14:25:34,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2021-09-22 14:25:34,667 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2021-09-22 14:25:34,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:34,668 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2021-09-22 14:25:34,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2021-09-22 14:25:34,668 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2021-09-22 14:25:34,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-09-22 14:25:34,669 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:34,669 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:34,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-09-22 14:25:34,669 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash -830913789, now seen corresponding path program 1 times [2021-09-22 14:25:34,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:34,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105270416] [2021-09-22 14:25:34,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:34,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:34,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:34,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105270416] [2021-09-22 14:25:34,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105270416] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:25:34,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:25:34,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-09-22 14:25:34,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854061688] [2021-09-22 14:25:34,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-09-22 14:25:34,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:34,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-09-22 14:25:34,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-09-22 14:25:34,716 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-09-22 14:25:34,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:34,813 INFO L93 Difference]: Finished difference Result 58 states and 136 transitions. [2021-09-22 14:25:34,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-09-22 14:25:34,814 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 [2021-09-22 14:25:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:34,817 INFO L225 Difference]: With dead ends: 58 [2021-09-22 14:25:34,817 INFO L226 Difference]: Without dead ends: 52 [2021-09-22 14:25:34,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-09-22 14:25:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-09-22 14:25:34,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2021-09-22 14:25:34,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4324324324324325) internal successors, (90), 37 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) [2021-09-22 14:25:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 90 transitions. [2021-09-22 14:25:34,834 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 90 transitions. Word has length 10 [2021-09-22 14:25:34,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:34,834 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 90 transitions. [2021-09-22 14:25:34,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-09-22 14:25:34,835 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 90 transitions. [2021-09-22 14:25:34,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-09-22 14:25:34,836 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:34,836 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:34,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-09-22 14:25:34,837 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:34,837 INFO L82 PathProgramCache]: Analyzing trace with hash -855995889, now seen corresponding path program 2 times [2021-09-22 14:25:34,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:34,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476758556] [2021-09-22 14:25:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:34,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:34,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:34,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476758556] [2021-09-22 14:25:34,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476758556] provided 1 perfect and 0 imperfect interpolant sequences [2021-09-22 14:25:34,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-09-22 14:25:34,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-09-22 14:25:34,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550723909] [2021-09-22 14:25:34,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-09-22 14:25:34,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:34,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-09-22 14:25:34,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-09-22 14:25:34,952 INFO L87 Difference]: Start difference. First operand 38 states and 90 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-09-22 14:25:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:35,035 INFO L93 Difference]: Finished difference Result 60 states and 142 transitions. [2021-09-22 14:25:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-09-22 14:25:35,035 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 [2021-09-22 14:25:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:35,036 INFO L225 Difference]: With dead ends: 60 [2021-09-22 14:25:35,036 INFO L226 Difference]: Without dead ends: 47 [2021-09-22 14:25:35,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-09-22 14:25:35,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-09-22 14:25:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2021-09-22 14:25:35,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 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) [2021-09-22 14:25:35,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2021-09-22 14:25:35,041 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2021-09-22 14:25:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:35,041 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2021-09-22 14:25:35,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2021-09-22 14:25:35,042 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2021-09-22 14:25:35,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-09-22 14:25:35,042 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:35,043 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:35,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-09-22 14:25:35,043 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:35,044 INFO L82 PathProgramCache]: Analyzing trace with hash 11487317, now seen corresponding path program 3 times [2021-09-22 14:25:35,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:35,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327723115] [2021-09-22 14:25:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:35,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:35,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:35,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327723115] [2021-09-22 14:25:35,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327723115] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:35,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249937560] [2021-09-22 14:25:35,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-09-22 14:25:35,136 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:35,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:35,153 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) [2021-09-22 14:25:35,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-09-22 14:25:35,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-09-22 14:25:35,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:35,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-09-22 14:25:35,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:35,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249937560] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:35,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:35,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-09-22 14:25:35,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830053130] [2021-09-22 14:25:35,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-09-22 14:25:35,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:35,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-09-22 14:25:35,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-09-22 14:25:35,276 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-09-22 14:25:35,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:35,439 INFO L93 Difference]: Finished difference Result 61 states and 147 transitions. [2021-09-22 14:25:35,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-09-22 14:25:35,439 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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 11 [2021-09-22 14:25:35,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:35,440 INFO L225 Difference]: With dead ends: 61 [2021-09-22 14:25:35,440 INFO L226 Difference]: Without dead ends: 49 [2021-09-22 14:25:35,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-09-22 14:25:35,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-09-22 14:25:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-09-22 14:25:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.5) internal successors, (105), 42 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) [2021-09-22 14:25:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2021-09-22 14:25:35,443 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2021-09-22 14:25:35,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:35,443 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2021-09-22 14:25:35,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 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) [2021-09-22 14:25:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2021-09-22 14:25:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-09-22 14:25:35,444 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:35,444 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:35,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:35,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:35,660 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:35,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:35,661 INFO L82 PathProgramCache]: Analyzing trace with hash -766059705, now seen corresponding path program 4 times [2021-09-22 14:25:35,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:35,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146808755] [2021-09-22 14:25:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:35,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:35,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:35,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146808755] [2021-09-22 14:25:35,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146808755] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:35,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709955011] [2021-09-22 14:25:35,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-09-22 14:25:35,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:35,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:35,740 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) [2021-09-22 14:25:35,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-09-22 14:25:35,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-09-22 14:25:35,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:35,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-09-22 14:25:35,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:35,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:35,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709955011] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:35,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:35,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-09-22 14:25:35,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544748945] [2021-09-22 14:25:35,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-09-22 14:25:35,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:35,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-09-22 14:25:35,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-09-22 14:25:35,904 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-09-22 14:25:35,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:35,996 INFO L93 Difference]: Finished difference Result 73 states and 174 transitions. [2021-09-22 14:25:35,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-09-22 14:25:35,997 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 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 11 [2021-09-22 14:25:35,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:35,997 INFO L225 Difference]: With dead ends: 73 [2021-09-22 14:25:35,998 INFO L226 Difference]: Without dead ends: 63 [2021-09-22 14:25:35,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-09-22 14:25:35,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-09-22 14:25:36,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2021-09-22 14:25:36,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:36,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2021-09-22 14:25:36,001 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 11 [2021-09-22 14:25:36,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:36,001 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2021-09-22 14:25:36,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 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) [2021-09-22 14:25:36,001 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2021-09-22 14:25:36,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-09-22 14:25:36,002 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:36,002 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:36,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:36,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-09-22 14:25:36,218 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:36,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:36,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1845297833, now seen corresponding path program 5 times [2021-09-22 14:25:36,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:36,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702433481] [2021-09-22 14:25:36,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:36,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:36,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:36,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:36,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702433481] [2021-09-22 14:25:36,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702433481] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:36,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443926303] [2021-09-22 14:25:36,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-09-22 14:25:36,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:36,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:36,286 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) [2021-09-22 14:25:36,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-09-22 14:25:36,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-09-22 14:25:36,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:36,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjunts are in the unsatisfiable core [2021-09-22 14:25:36,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:36,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443926303] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:36,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:36,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-09-22 14:25:36,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421115601] [2021-09-22 14:25:36,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-09-22 14:25:36,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:36,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-09-22 14:25:36,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-09-22 14:25:36,405 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2021-09-22 14:25:36,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:36,619 INFO L93 Difference]: Finished difference Result 71 states and 173 transitions. [2021-09-22 14:25:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-09-22 14:25:36,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 13 [2021-09-22 14:25:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:36,620 INFO L225 Difference]: With dead ends: 71 [2021-09-22 14:25:36,620 INFO L226 Difference]: Without dead ends: 59 [2021-09-22 14:25:36,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2021-09-22 14:25:36,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-09-22 14:25:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-09-22 14:25:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 55 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2021-09-22 14:25:36,623 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 13 [2021-09-22 14:25:36,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:36,624 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2021-09-22 14:25:36,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2021-09-22 14:25:36,624 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2021-09-22 14:25:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-09-22 14:25:36,624 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:36,625 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:36,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:36,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:36,841 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:36,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:36,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1743618811, now seen corresponding path program 6 times [2021-09-22 14:25:36,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:36,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087973384] [2021-09-22 14:25:36,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:36,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:36,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:36,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087973384] [2021-09-22 14:25:36,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087973384] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:36,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122784770] [2021-09-22 14:25:36,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-09-22 14:25:36,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:36,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:36,929 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) [2021-09-22 14:25:36,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-09-22 14:25:36,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-09-22 14:25:36,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:36,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjunts are in the unsatisfiable core [2021-09-22 14:25:36,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:37,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122784770] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:37,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:37,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-09-22 14:25:37,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325938767] [2021-09-22 14:25:37,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-09-22 14:25:37,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:37,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-09-22 14:25:37,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-09-22 14:25:37,047 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2021-09-22 14:25:37,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:37,202 INFO L93 Difference]: Finished difference Result 77 states and 187 transitions. [2021-09-22 14:25:37,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-09-22 14:25:37,202 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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 13 [2021-09-22 14:25:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:37,204 INFO L225 Difference]: With dead ends: 77 [2021-09-22 14:25:37,204 INFO L226 Difference]: Without dead ends: 62 [2021-09-22 14:25:37,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-09-22 14:25:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-09-22 14:25:37,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2021-09-22 14:25:37,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 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) [2021-09-22 14:25:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2021-09-22 14:25:37,211 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 13 [2021-09-22 14:25:37,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:37,211 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2021-09-22 14:25:37,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 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) [2021-09-22 14:25:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2021-09-22 14:25:37,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-09-22 14:25:37,212 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:37,212 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:37,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:37,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:37,429 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:37,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:37,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1782402707, now seen corresponding path program 7 times [2021-09-22 14:25:37,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:37,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081652150] [2021-09-22 14:25:37,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:37,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:37,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:37,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081652150] [2021-09-22 14:25:37,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081652150] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:37,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240796760] [2021-09-22 14:25:37,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-09-22 14:25:37,498 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:37,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:37,499 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) [2021-09-22 14:25:37,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-09-22 14:25:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:37,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 12 conjunts are in the unsatisfiable core [2021-09-22 14:25:37,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:37,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240796760] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:37,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:37,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-09-22 14:25:37,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059454754] [2021-09-22 14:25:37,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-09-22 14:25:37,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:37,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-09-22 14:25:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-09-22 14:25:37,620 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2021-09-22 14:25:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:37,837 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2021-09-22 14:25:37,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-09-22 14:25:37,837 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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 14 [2021-09-22 14:25:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:37,838 INFO L225 Difference]: With dead ends: 90 [2021-09-22 14:25:37,838 INFO L226 Difference]: Without dead ends: 76 [2021-09-22 14:25:37,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-09-22 14:25:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-09-22 14:25:37,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-09-22 14:25:37,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.547169811320755) internal successors, (135), 53 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:37,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 135 transitions. [2021-09-22 14:25:37,847 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 135 transitions. Word has length 14 [2021-09-22 14:25:37,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:37,847 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 135 transitions. [2021-09-22 14:25:37,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 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) [2021-09-22 14:25:37,847 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 135 transitions. [2021-09-22 14:25:37,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-09-22 14:25:37,849 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:37,849 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:37,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:38,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:38,065 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:38,066 INFO L82 PathProgramCache]: Analyzing trace with hash 490568153, now seen corresponding path program 8 times [2021-09-22 14:25:38,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:38,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216732559] [2021-09-22 14:25:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:38,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:38,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:38,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:38,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216732559] [2021-09-22 14:25:38,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216732559] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:38,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649842783] [2021-09-22 14:25:38,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-09-22 14:25:38,121 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:38,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:38,122 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) [2021-09-22 14:25:38,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-09-22 14:25:38,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-09-22 14:25:38,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:38,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 13 conjunts are in the unsatisfiable core [2021-09-22 14:25:38,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:38,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649842783] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:38,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:38,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-09-22 14:25:38,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539239068] [2021-09-22 14:25:38,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-09-22 14:25:38,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:38,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-09-22 14:25:38,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-09-22 14:25:38,243 INFO L87 Difference]: Start difference. First operand 54 states and 135 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2021-09-22 14:25:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:38,483 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2021-09-22 14:25:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-09-22 14:25:38,483 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 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 15 [2021-09-22 14:25:38,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:38,484 INFO L225 Difference]: With dead ends: 92 [2021-09-22 14:25:38,484 INFO L226 Difference]: Without dead ends: 78 [2021-09-22 14:25:38,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2021-09-22 14:25:38,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-09-22 14:25:38,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 48. [2021-09-22 14:25:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.4468085106382977) internal successors, (115), 47 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 115 transitions. [2021-09-22 14:25:38,486 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 115 transitions. Word has length 15 [2021-09-22 14:25:38,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:38,486 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 115 transitions. [2021-09-22 14:25:38,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2021-09-22 14:25:38,487 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 115 transitions. [2021-09-22 14:25:38,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-09-22 14:25:38,487 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:38,487 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:38,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:38,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:38,704 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:38,704 INFO L82 PathProgramCache]: Analyzing trace with hash -802659181, now seen corresponding path program 9 times [2021-09-22 14:25:38,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:38,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823115036] [2021-09-22 14:25:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:38,704 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:38,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:38,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823115036] [2021-09-22 14:25:38,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823115036] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:38,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211895273] [2021-09-22 14:25:38,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-09-22 14:25:38,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:38,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:38,779 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) [2021-09-22 14:25:38,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-09-22 14:25:38,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-09-22 14:25:38,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:38,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2021-09-22 14:25:38,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:38,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211895273] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:38,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:38,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-09-22 14:25:38,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779799643] [2021-09-22 14:25:38,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-09-22 14:25:38,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:38,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-09-22 14:25:38,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-09-22 14:25:38,907 INFO L87 Difference]: Start difference. First operand 48 states and 115 transitions. Second operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) [2021-09-22 14:25:39,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:39,108 INFO L93 Difference]: Finished difference Result 78 states and 189 transitions. [2021-09-22 14:25:39,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-09-22 14:25:39,109 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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 16 [2021-09-22 14:25:39,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:39,109 INFO L225 Difference]: With dead ends: 78 [2021-09-22 14:25:39,110 INFO L226 Difference]: Without dead ends: 72 [2021-09-22 14:25:39,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 187.6ms TimeCoverageRelationStatistics Valid=221, Invalid=481, Unknown=0, NotChecked=0, Total=702 [2021-09-22 14:25:39,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-09-22 14:25:39,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2021-09-22 14:25:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.5535714285714284) internal successors, (143), 56 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 143 transitions. [2021-09-22 14:25:39,112 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 143 transitions. Word has length 16 [2021-09-22 14:25:39,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:39,112 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 143 transitions. [2021-09-22 14:25:39,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) [2021-09-22 14:25:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 143 transitions. [2021-09-22 14:25:39,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-09-22 14:25:39,113 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:39,113 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:39,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:39,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:39,330 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:39,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:39,330 INFO L82 PathProgramCache]: Analyzing trace with hash -802657259, now seen corresponding path program 10 times [2021-09-22 14:25:39,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:39,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957098797] [2021-09-22 14:25:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:39,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:39,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:39,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957098797] [2021-09-22 14:25:39,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957098797] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:39,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58279423] [2021-09-22 14:25:39,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-09-22 14:25:39,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:39,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:39,413 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) [2021-09-22 14:25:39,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-09-22 14:25:39,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-09-22 14:25:39,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:39,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjunts are in the unsatisfiable core [2021-09-22 14:25:39,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:39,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:39,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58279423] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:39,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:39,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-09-22 14:25:39,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817235335] [2021-09-22 14:25:39,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-09-22 14:25:39,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:39,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-09-22 14:25:39,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-09-22 14:25:39,615 INFO L87 Difference]: Start difference. First operand 57 states and 143 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2021-09-22 14:25:39,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:39,869 INFO L93 Difference]: Finished difference Result 84 states and 205 transitions. [2021-09-22 14:25:39,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-09-22 14:25:39,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 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 16 [2021-09-22 14:25:39,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:39,870 INFO L225 Difference]: With dead ends: 84 [2021-09-22 14:25:39,870 INFO L226 Difference]: Without dead ends: 70 [2021-09-22 14:25:39,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-09-22 14:25:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-09-22 14:25:39,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 46. [2021-09-22 14:25:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2021-09-22 14:25:39,872 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 16 [2021-09-22 14:25:39,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:39,872 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2021-09-22 14:25:39,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 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) [2021-09-22 14:25:39,872 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2021-09-22 14:25:39,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-09-22 14:25:39,873 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:39,873 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:39,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:40,073 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,SelfDestructingSolverStorable11 [2021-09-22 14:25:40,073 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:40,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:40,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1010115109, now seen corresponding path program 11 times [2021-09-22 14:25:40,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:40,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784266789] [2021-09-22 14:25:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:40,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:40,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:40,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784266789] [2021-09-22 14:25:40,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784266789] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:40,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909452543] [2021-09-22 14:25:40,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-09-22 14:25:40,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:40,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:40,156 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) [2021-09-22 14:25:40,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-09-22 14:25:40,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-09-22 14:25:40,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:40,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-09-22 14:25:40,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:40,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909452543] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:40,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:40,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-09-22 14:25:40,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484324520] [2021-09-22 14:25:40,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-09-22 14:25:40,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:40,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-09-22 14:25:40,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-09-22 14:25:40,311 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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) [2021-09-22 14:25:40,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:40,616 INFO L93 Difference]: Finished difference Result 98 states and 236 transitions. [2021-09-22 14:25:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-09-22 14:25:40,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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 17 [2021-09-22 14:25:40,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:40,618 INFO L225 Difference]: With dead ends: 98 [2021-09-22 14:25:40,618 INFO L226 Difference]: Without dead ends: 84 [2021-09-22 14:25:40,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 282.8ms TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2021-09-22 14:25:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-09-22 14:25:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2021-09-22 14:25:40,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.564516129032258) internal successors, (159), 62 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 159 transitions. [2021-09-22 14:25:40,620 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 159 transitions. Word has length 17 [2021-09-22 14:25:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:40,620 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 159 transitions. [2021-09-22 14:25:40,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 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) [2021-09-22 14:25:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 159 transitions. [2021-09-22 14:25:40,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-09-22 14:25:40,621 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:40,621 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:40,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:40,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-09-22 14:25:40,833 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:40,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:40,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1740779799, now seen corresponding path program 12 times [2021-09-22 14:25:40,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:40,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385819404] [2021-09-22 14:25:40,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:40,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:40,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:40,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385819404] [2021-09-22 14:25:40,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385819404] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:40,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807010824] [2021-09-22 14:25:40,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-09-22 14:25:40,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:40,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:40,933 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) [2021-09-22 14:25:40,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-09-22 14:25:41,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-09-22 14:25:41,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:41,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2021-09-22 14:25:41,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:41,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:41,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807010824] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:41,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:41,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-09-22 14:25:41,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664288253] [2021-09-22 14:25:41,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-09-22 14:25:41,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:41,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-09-22 14:25:41,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-09-22 14:25:41,129 INFO L87 Difference]: Start difference. First operand 63 states and 159 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 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) [2021-09-22 14:25:41,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:41,445 INFO L93 Difference]: Finished difference Result 104 states and 249 transitions. [2021-09-22 14:25:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-09-22 14:25:41,445 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 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 18 [2021-09-22 14:25:41,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:41,446 INFO L225 Difference]: With dead ends: 104 [2021-09-22 14:25:41,446 INFO L226 Difference]: Without dead ends: 90 [2021-09-22 14:25:41,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=447, Invalid=1035, Unknown=0, NotChecked=0, Total=1482 [2021-09-22 14:25:41,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-09-22 14:25:41,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 52. [2021-09-22 14:25:41,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.4705882352941178) internal successors, (126), 51 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:41,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 126 transitions. [2021-09-22 14:25:41,448 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 126 transitions. Word has length 18 [2021-09-22 14:25:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:41,448 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 126 transitions. [2021-09-22 14:25:41,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 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) [2021-09-22 14:25:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 126 transitions. [2021-09-22 14:25:41,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-09-22 14:25:41,448 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:41,449 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:41,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:41,656 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,SelfDestructingSolverStorable13 [2021-09-22 14:25:41,657 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:41,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:41,657 INFO L82 PathProgramCache]: Analyzing trace with hash -57720357, now seen corresponding path program 13 times [2021-09-22 14:25:41,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:41,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729147633] [2021-09-22 14:25:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:41,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:41,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:41,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729147633] [2021-09-22 14:25:41,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729147633] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:41,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977190063] [2021-09-22 14:25:41,751 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-09-22 14:25:41,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:41,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:41,752 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) [2021-09-22 14:25:41,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-09-22 14:25:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:41,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 16 conjunts are in the unsatisfiable core [2021-09-22 14:25:41,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:41,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977190063] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:41,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:41,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-09-22 14:25:41,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553017905] [2021-09-22 14:25:41,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-09-22 14:25:41,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:41,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-09-22 14:25:41,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-09-22 14:25:41,935 INFO L87 Difference]: Start difference. First operand 52 states and 126 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 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) [2021-09-22 14:25:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:42,189 INFO L93 Difference]: Finished difference Result 90 states and 219 transitions. [2021-09-22 14:25:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-09-22 14:25:42,189 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 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 19 [2021-09-22 14:25:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:42,190 INFO L225 Difference]: With dead ends: 90 [2021-09-22 14:25:42,190 INFO L226 Difference]: Without dead ends: 84 [2021-09-22 14:25:42,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2021-09-22 14:25:42,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-09-22 14:25:42,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2021-09-22 14:25:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5692307692307694) internal successors, (167), 65 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 167 transitions. [2021-09-22 14:25:42,192 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 167 transitions. Word has length 19 [2021-09-22 14:25:42,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:42,192 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 167 transitions. [2021-09-22 14:25:42,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 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) [2021-09-22 14:25:42,192 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 167 transitions. [2021-09-22 14:25:42,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-09-22 14:25:42,192 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:42,192 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:42,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:42,393 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,SelfDestructingSolverStorable14 [2021-09-22 14:25:42,393 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:42,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:42,393 INFO L82 PathProgramCache]: Analyzing trace with hash -57718435, now seen corresponding path program 14 times [2021-09-22 14:25:42,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:42,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176267224] [2021-09-22 14:25:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:42,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:42,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:42,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176267224] [2021-09-22 14:25:42,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176267224] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:42,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571193349] [2021-09-22 14:25:42,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-09-22 14:25:42,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:42,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:42,511 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) [2021-09-22 14:25:42,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-09-22 14:25:42,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-09-22 14:25:42,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:42,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjunts are in the unsatisfiable core [2021-09-22 14:25:42,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:42,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571193349] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:42,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:42,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-09-22 14:25:42,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135923591] [2021-09-22 14:25:42,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-09-22 14:25:42,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:42,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-09-22 14:25:42,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-09-22 14:25:42,711 INFO L87 Difference]: Start difference. First operand 66 states and 167 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 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) [2021-09-22 14:25:43,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:43,050 INFO L93 Difference]: Finished difference Result 108 states and 260 transitions. [2021-09-22 14:25:43,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-09-22 14:25:43,051 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 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 19 [2021-09-22 14:25:43,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:43,051 INFO L225 Difference]: With dead ends: 108 [2021-09-22 14:25:43,051 INFO L226 Difference]: Without dead ends: 94 [2021-09-22 14:25:43,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=517, Invalid=1205, Unknown=0, NotChecked=0, Total=1722 [2021-09-22 14:25:43,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-09-22 14:25:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 56. [2021-09-22 14:25:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 55 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 135 transitions. [2021-09-22 14:25:43,053 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 135 transitions. Word has length 19 [2021-09-22 14:25:43,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:43,054 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 135 transitions. [2021-09-22 14:25:43,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 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) [2021-09-22 14:25:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 135 transitions. [2021-09-22 14:25:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-09-22 14:25:43,054 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:43,054 INFO L512 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:43,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:43,264 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,SelfDestructingSolverStorable15 [2021-09-22 14:25:43,265 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:43,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:43,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2147399191, now seen corresponding path program 15 times [2021-09-22 14:25:43,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:43,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693268108] [2021-09-22 14:25:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:43,265 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:43,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:43,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693268108] [2021-09-22 14:25:43,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693268108] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:43,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649016149] [2021-09-22 14:25:43,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-09-22 14:25:43,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:43,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:43,373 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) [2021-09-22 14:25:43,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-09-22 14:25:43,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-09-22 14:25:43,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:43,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2021-09-22 14:25:43,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:43,575 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:43,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649016149] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:43,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:43,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-09-22 14:25:43,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910933558] [2021-09-22 14:25:43,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-09-22 14:25:43,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:43,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-09-22 14:25:43,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-09-22 14:25:43,578 INFO L87 Difference]: Start difference. First operand 56 states and 135 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:43,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:43,876 INFO L93 Difference]: Finished difference Result 94 states and 229 transitions. [2021-09-22 14:25:43,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-09-22 14:25:43,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-09-22 14:25:43,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:43,877 INFO L225 Difference]: With dead ends: 94 [2021-09-22 14:25:43,877 INFO L226 Difference]: Without dead ends: 88 [2021-09-22 14:25:43,877 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=442, Invalid=1040, Unknown=0, NotChecked=0, Total=1482 [2021-09-22 14:25:43,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-09-22 14:25:43,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2021-09-22 14:25:43,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.573529411764706) internal successors, (175), 68 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:43,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 175 transitions. [2021-09-22 14:25:43,879 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 175 transitions. Word has length 20 [2021-09-22 14:25:43,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:43,879 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 175 transitions. [2021-09-22 14:25:43,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:43,879 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 175 transitions. [2021-09-22 14:25:43,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-09-22 14:25:43,879 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:43,879 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:43,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:44,080 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,SelfDestructingSolverStorable16 [2021-09-22 14:25:44,080 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:44,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:44,080 INFO L82 PathProgramCache]: Analyzing trace with hash 2147401113, now seen corresponding path program 16 times [2021-09-22 14:25:44,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:44,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755117661] [2021-09-22 14:25:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:44,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:44,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:44,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:44,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755117661] [2021-09-22 14:25:44,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755117661] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:44,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700503837] [2021-09-22 14:25:44,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-09-22 14:25:44,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:44,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:44,193 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) [2021-09-22 14:25:44,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-09-22 14:25:44,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-09-22 14:25:44,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:44,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjunts are in the unsatisfiable core [2021-09-22 14:25:44,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:44,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700503837] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:44,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:44,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-09-22 14:25:44,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793621270] [2021-09-22 14:25:44,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-09-22 14:25:44,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:44,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-09-22 14:25:44,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-09-22 14:25:44,390 INFO L87 Difference]: Start difference. First operand 69 states and 175 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 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) [2021-09-22 14:25:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:44,760 INFO L93 Difference]: Finished difference Result 100 states and 245 transitions. [2021-09-22 14:25:44,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-09-22 14:25:44,760 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 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 20 [2021-09-22 14:25:44,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:44,761 INFO L225 Difference]: With dead ends: 100 [2021-09-22 14:25:44,761 INFO L226 Difference]: Without dead ends: 86 [2021-09-22 14:25:44,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 346.4ms TimeCoverageRelationStatistics Valid=561, Invalid=1245, Unknown=0, NotChecked=0, Total=1806 [2021-09-22 14:25:44,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-09-22 14:25:44,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 54. [2021-09-22 14:25:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.490566037735849) internal successors, (132), 53 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:44,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2021-09-22 14:25:44,763 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 20 [2021-09-22 14:25:44,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:44,763 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2021-09-22 14:25:44,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 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) [2021-09-22 14:25:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2021-09-22 14:25:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-09-22 14:25:44,763 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:44,763 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:44,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:44,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:44,964 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:44,964 INFO L82 PathProgramCache]: Analyzing trace with hash 367451231, now seen corresponding path program 17 times [2021-09-22 14:25:44,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:44,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416763957] [2021-09-22 14:25:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:44,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:44,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:45,080 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:45,080 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:45,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416763957] [2021-09-22 14:25:45,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416763957] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:45,080 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12635683] [2021-09-22 14:25:45,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-09-22 14:25:45,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:45,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:45,082 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) [2021-09-22 14:25:45,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-09-22 14:25:45,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-09-22 14:25:45,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:45,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 19 conjunts are in the unsatisfiable core [2021-09-22 14:25:45,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:45,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:45,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12635683] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:45,310 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:45,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-09-22 14:25:45,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116867175] [2021-09-22 14:25:45,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-09-22 14:25:45,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:45,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-09-22 14:25:45,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-09-22 14:25:45,311 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-09-22 14:25:45,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:45,731 INFO L93 Difference]: Finished difference Result 114 states and 276 transitions. [2021-09-22 14:25:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-09-22 14:25:45,731 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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 21 [2021-09-22 14:25:45,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:45,732 INFO L225 Difference]: With dead ends: 114 [2021-09-22 14:25:45,732 INFO L226 Difference]: Without dead ends: 100 [2021-09-22 14:25:45,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 408.4ms TimeCoverageRelationStatistics Valid=677, Invalid=1579, Unknown=0, NotChecked=0, Total=2256 [2021-09-22 14:25:45,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-09-22 14:25:45,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 75. [2021-09-22 14:25:45,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.581081081081081) internal successors, (191), 74 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 191 transitions. [2021-09-22 14:25:45,734 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 191 transitions. Word has length 21 [2021-09-22 14:25:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:45,734 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 191 transitions. [2021-09-22 14:25:45,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2021-09-22 14:25:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 191 transitions. [2021-09-22 14:25:45,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-09-22 14:25:45,734 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:45,735 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:45,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:45,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:45,945 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:45,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2068459931, now seen corresponding path program 18 times [2021-09-22 14:25:45,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:45,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252319952] [2021-09-22 14:25:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:45,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:46,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:46,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252319952] [2021-09-22 14:25:46,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252319952] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:46,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806046524] [2021-09-22 14:25:46,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-09-22 14:25:46,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:46,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:46,081 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) [2021-09-22 14:25:46,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-09-22 14:25:46,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-09-22 14:25:46,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:46,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-09-22 14:25:46,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:46,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806046524] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:46,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:46,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-09-22 14:25:46,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474144300] [2021-09-22 14:25:46,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-09-22 14:25:46,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:46,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-09-22 14:25:46,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-09-22 14:25:46,314 INFO L87 Difference]: Start difference. First operand 75 states and 191 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2021-09-22 14:25:46,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:46,790 INFO L93 Difference]: Finished difference Result 120 states and 289 transitions. [2021-09-22 14:25:46,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-09-22 14:25:46,790 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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 22 [2021-09-22 14:25:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:46,791 INFO L225 Difference]: With dead ends: 120 [2021-09-22 14:25:46,791 INFO L226 Difference]: Without dead ends: 106 [2021-09-22 14:25:46,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 457.5ms TimeCoverageRelationStatistics Valid=767, Invalid=1783, Unknown=0, NotChecked=0, Total=2550 [2021-09-22 14:25:46,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-09-22 14:25:46,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 60. [2021-09-22 14:25:46,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.4745762711864407) internal successors, (146), 59 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:46,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 146 transitions. [2021-09-22 14:25:46,793 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 146 transitions. Word has length 22 [2021-09-22 14:25:46,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:46,793 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 146 transitions. [2021-09-22 14:25:46,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2021-09-22 14:25:46,793 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 146 transitions. [2021-09-22 14:25:46,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-09-22 14:25:46,794 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:46,794 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:46,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:47,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:47,002 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:47,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:47,002 INFO L82 PathProgramCache]: Analyzing trace with hash 933605215, now seen corresponding path program 19 times [2021-09-22 14:25:47,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:47,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951472426] [2021-09-22 14:25:47,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:47,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:47,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:47,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:47,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951472426] [2021-09-22 14:25:47,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951472426] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:47,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540523746] [2021-09-22 14:25:47,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-09-22 14:25:47,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:47,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:47,153 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) [2021-09-22 14:25:47,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-09-22 14:25:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:47,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjunts are in the unsatisfiable core [2021-09-22 14:25:47,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:47,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540523746] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:47,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:47,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-09-22 14:25:47,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498748127] [2021-09-22 14:25:47,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-09-22 14:25:47,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-09-22 14:25:47,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2021-09-22 14:25:47,417 INFO L87 Difference]: Start difference. First operand 60 states and 146 transitions. Second operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-09-22 14:25:47,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:47,914 INFO L93 Difference]: Finished difference Result 106 states and 259 transitions. [2021-09-22 14:25:47,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-09-22 14:25:47,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 23 [2021-09-22 14:25:47,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:47,916 INFO L225 Difference]: With dead ends: 106 [2021-09-22 14:25:47,916 INFO L226 Difference]: Without dead ends: 100 [2021-09-22 14:25:47,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2021-09-22 14:25:47,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-09-22 14:25:47,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2021-09-22 14:25:47,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.5844155844155843) internal successors, (199), 77 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 199 transitions. [2021-09-22 14:25:47,920 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 199 transitions. Word has length 23 [2021-09-22 14:25:47,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:47,921 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 199 transitions. [2021-09-22 14:25:47,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-09-22 14:25:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 199 transitions. [2021-09-22 14:25:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-09-22 14:25:47,922 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:47,922 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:47,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:48,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:48,139 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:48,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:48,139 INFO L82 PathProgramCache]: Analyzing trace with hash 933607137, now seen corresponding path program 20 times [2021-09-22 14:25:48,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:48,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941044803] [2021-09-22 14:25:48,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:48,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:48,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:48,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941044803] [2021-09-22 14:25:48,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941044803] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:48,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795649785] [2021-09-22 14:25:48,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-09-22 14:25:48,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:48,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:48,301 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) [2021-09-22 14:25:48,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-09-22 14:25:48,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-09-22 14:25:48,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:48,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2021-09-22 14:25:48,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:48,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795649785] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:48,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:48,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-09-22 14:25:48,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881896945] [2021-09-22 14:25:48,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-09-22 14:25:48,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:48,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-09-22 14:25:48,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-09-22 14:25:48,543 INFO L87 Difference]: Start difference. First operand 78 states and 199 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2021-09-22 14:25:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:49,124 INFO L93 Difference]: Finished difference Result 112 states and 275 transitions. [2021-09-22 14:25:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-09-22 14:25:49,124 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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 23 [2021-09-22 14:25:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:49,125 INFO L225 Difference]: With dead ends: 112 [2021-09-22 14:25:49,125 INFO L226 Difference]: Without dead ends: 100 [2021-09-22 14:25:49,125 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 592.2ms TimeCoverageRelationStatistics Valid=818, Invalid=1834, Unknown=0, NotChecked=0, Total=2652 [2021-09-22 14:25:49,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-09-22 14:25:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-09-22 14:25:49,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.5875) internal successors, (207), 80 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 207 transitions. [2021-09-22 14:25:49,127 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 207 transitions. Word has length 23 [2021-09-22 14:25:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:49,127 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 207 transitions. [2021-09-22 14:25:49,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 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) [2021-09-22 14:25:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 207 transitions. [2021-09-22 14:25:49,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-09-22 14:25:49,128 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:49,128 INFO L512 BasicCegarLoop]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:49,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:49,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:49,328 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:49,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:49,329 INFO L82 PathProgramCache]: Analyzing trace with hash -779573861, now seen corresponding path program 21 times [2021-09-22 14:25:49,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:49,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849325354] [2021-09-22 14:25:49,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:49,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:49,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:49,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849325354] [2021-09-22 14:25:49,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849325354] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:49,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110470204] [2021-09-22 14:25:49,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-09-22 14:25:49,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:49,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:49,461 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) [2021-09-22 14:25:49,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-09-22 14:25:49,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-09-22 14:25:49,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:49,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2021-09-22 14:25:49,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:25:49,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110470204] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:49,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:49,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-09-22 14:25:49,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92471557] [2021-09-22 14:25:49,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-09-22 14:25:49,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:49,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-09-22 14:25:49,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-09-22 14:25:49,728 INFO L87 Difference]: Start difference. First operand 81 states and 207 transitions. Second operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-09-22 14:25:50,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:50,178 INFO L93 Difference]: Finished difference Result 108 states and 265 transitions. [2021-09-22 14:25:50,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-09-22 14:25:50,178 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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 24 [2021-09-22 14:25:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:50,179 INFO L225 Difference]: With dead ends: 108 [2021-09-22 14:25:50,179 INFO L226 Difference]: Without dead ends: 102 [2021-09-22 14:25:50,179 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 437.7ms TimeCoverageRelationStatistics Valid=739, Invalid=1811, Unknown=0, NotChecked=0, Total=2550 [2021-09-22 14:25:50,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-09-22 14:25:50,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2021-09-22 14:25:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 61 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:50,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2021-09-22 14:25:50,181 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 24 [2021-09-22 14:25:50,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:50,181 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2021-09-22 14:25:50,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-09-22 14:25:50,181 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2021-09-22 14:25:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-09-22 14:25:50,182 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:50,182 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:50,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:50,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:50,382 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:50,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:50,382 INFO L82 PathProgramCache]: Analyzing trace with hash -779571939, now seen corresponding path program 22 times [2021-09-22 14:25:50,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:50,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262855328] [2021-09-22 14:25:50,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:50,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:50,522 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:50,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:50,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262855328] [2021-09-22 14:25:50,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262855328] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:50,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539467113] [2021-09-22 14:25:50,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-09-22 14:25:50,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:50,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:50,523 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) [2021-09-22 14:25:50,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-09-22 14:25:50,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-09-22 14:25:50,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:50,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2021-09-22 14:25:50,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:50,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539467113] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:50,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:50,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-09-22 14:25:50,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795014318] [2021-09-22 14:25:50,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-09-22 14:25:50,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:50,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-09-22 14:25:50,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-09-22 14:25:50,792 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2021-09-22 14:25:51,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:51,336 INFO L93 Difference]: Finished difference Result 114 states and 281 transitions. [2021-09-22 14:25:51,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-09-22 14:25:51,337 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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 24 [2021-09-22 14:25:51,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:51,337 INFO L225 Difference]: With dead ends: 114 [2021-09-22 14:25:51,337 INFO L226 Difference]: Without dead ends: 102 [2021-09-22 14:25:51,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 534.0ms TimeCoverageRelationStatistics Valid=917, Invalid=2053, Unknown=0, NotChecked=0, Total=2970 [2021-09-22 14:25:51,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-09-22 14:25:51,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 62. [2021-09-22 14:25:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4918032786885247) internal successors, (152), 61 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2021-09-22 14:25:51,340 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 24 [2021-09-22 14:25:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:51,340 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2021-09-22 14:25:51,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 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) [2021-09-22 14:25:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2021-09-22 14:25:51,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-09-22 14:25:51,340 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:51,340 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:51,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:51,548 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,SelfDestructingSolverStorable23 [2021-09-22 14:25:51,549 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:51,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:51,549 INFO L82 PathProgramCache]: Analyzing trace with hash -451413789, now seen corresponding path program 23 times [2021-09-22 14:25:51,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:51,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439758649] [2021-09-22 14:25:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:51,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:51,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:51,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439758649] [2021-09-22 14:25:51,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439758649] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:51,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724021472] [2021-09-22 14:25:51,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-09-22 14:25:51,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:51,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:51,703 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) [2021-09-22 14:25:51,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-09-22 14:25:51,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-09-22 14:25:51,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:51,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjunts are in the unsatisfiable core [2021-09-22 14:25:51,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:51,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724021472] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:51,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:51,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-09-22 14:25:51,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86448875] [2021-09-22 14:25:51,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-09-22 14:25:51,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:51,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-09-22 14:25:51,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-09-22 14:25:51,984 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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) [2021-09-22 14:25:52,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:52,551 INFO L93 Difference]: Finished difference Result 118 states and 291 transitions. [2021-09-22 14:25:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-09-22 14:25:52,552 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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 25 [2021-09-22 14:25:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:52,552 INFO L225 Difference]: With dead ends: 118 [2021-09-22 14:25:52,552 INFO L226 Difference]: Without dead ends: 106 [2021-09-22 14:25:52,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 562.5ms TimeCoverageRelationStatistics Valid=1018, Invalid=2288, Unknown=0, NotChecked=0, Total=3306 [2021-09-22 14:25:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-09-22 14:25:52,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 66. [2021-09-22 14:25:52,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.476923076923077) internal successors, (161), 65 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2021-09-22 14:25:52,555 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 25 [2021-09-22 14:25:52,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:52,555 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2021-09-22 14:25:52,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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) [2021-09-22 14:25:52,555 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2021-09-22 14:25:52,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-09-22 14:25:52,555 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:52,555 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:52,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:52,755 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,SelfDestructingSolverStorable24 [2021-09-22 14:25:52,756 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:52,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1844031457, now seen corresponding path program 24 times [2021-09-22 14:25:52,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:52,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454668802] [2021-09-22 14:25:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:52,756 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:52,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:52,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454668802] [2021-09-22 14:25:52,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454668802] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:52,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488416696] [2021-09-22 14:25:52,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-09-22 14:25:52,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:52,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:52,918 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) [2021-09-22 14:25:52,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-09-22 14:25:53,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-09-22 14:25:53,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:53,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 24 conjunts are in the unsatisfiable core [2021-09-22 14:25:53,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:53,247 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:53,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488416696] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:53,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:53,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-09-22 14:25:53,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866283055] [2021-09-22 14:25:53,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-09-22 14:25:53,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:53,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-09-22 14:25:53,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2021-09-22 14:25:53,249 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 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) [2021-09-22 14:25:53,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:53,892 INFO L93 Difference]: Finished difference Result 122 states and 301 transitions. [2021-09-22 14:25:53,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-09-22 14:25:53,893 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 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 26 [2021-09-22 14:25:53,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:53,893 INFO L225 Difference]: With dead ends: 122 [2021-09-22 14:25:53,893 INFO L226 Difference]: Without dead ends: 110 [2021-09-22 14:25:53,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 629.3ms TimeCoverageRelationStatistics Valid=1128, Invalid=2532, Unknown=0, NotChecked=0, Total=3660 [2021-09-22 14:25:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-09-22 14:25:53,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2021-09-22 14:25:53,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.4923076923076923) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:53,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2021-09-22 14:25:53,896 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 26 [2021-09-22 14:25:53,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:53,896 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2021-09-22 14:25:53,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 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) [2021-09-22 14:25:53,896 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2021-09-22 14:25:53,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-09-22 14:25:53,896 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:53,896 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:53,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:54,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-09-22 14:25:54,097 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:54,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:54,098 INFO L82 PathProgramCache]: Analyzing trace with hash -16661915, now seen corresponding path program 25 times [2021-09-22 14:25:54,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:54,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315027194] [2021-09-22 14:25:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:54,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:54,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:54,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315027194] [2021-09-22 14:25:54,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315027194] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:54,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616154070] [2021-09-22 14:25:54,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-09-22 14:25:54,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:54,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:54,264 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) [2021-09-22 14:25:54,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-09-22 14:25:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:54,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjunts are in the unsatisfiable core [2021-09-22 14:25:54,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:54,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616154070] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:54,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:54,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-09-22 14:25:54,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271694791] [2021-09-22 14:25:54,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-09-22 14:25:54,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:54,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-09-22 14:25:54,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2021-09-22 14:25:54,575 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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) [2021-09-22 14:25:55,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:55,220 INFO L93 Difference]: Finished difference Result 126 states and 311 transitions. [2021-09-22 14:25:55,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-09-22 14:25:55,220 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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 27 [2021-09-22 14:25:55,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:55,221 INFO L225 Difference]: With dead ends: 126 [2021-09-22 14:25:55,221 INFO L226 Difference]: Without dead ends: 114 [2021-09-22 14:25:55,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 650.4ms TimeCoverageRelationStatistics Valid=1240, Invalid=2792, Unknown=0, NotChecked=0, Total=4032 [2021-09-22 14:25:55,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-09-22 14:25:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 70. [2021-09-22 14:25:55,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.4782608695652173) internal successors, (171), 69 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:55,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2021-09-22 14:25:55,224 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 27 [2021-09-22 14:25:55,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:55,224 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2021-09-22 14:25:55,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 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) [2021-09-22 14:25:55,224 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2021-09-22 14:25:55,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-09-22 14:25:55,224 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:55,224 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:55,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-09-22 14:25:55,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:55,425 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:55,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1707555489, now seen corresponding path program 26 times [2021-09-22 14:25:55,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:55,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808838948] [2021-09-22 14:25:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:55,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:55,616 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:55,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:55,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808838948] [2021-09-22 14:25:55,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808838948] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:55,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870220205] [2021-09-22 14:25:55,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-09-22 14:25:55,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:55,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:55,618 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) [2021-09-22 14:25:55,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-09-22 14:25:55,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-09-22 14:25:55,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:55,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2021-09-22 14:25:55,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:55,940 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:55,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870220205] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:55,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:55,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-09-22 14:25:55,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517596358] [2021-09-22 14:25:55,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-09-22 14:25:55,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:55,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-09-22 14:25:55,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-09-22 14:25:55,943 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 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) [2021-09-22 14:25:56,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:56,670 INFO L93 Difference]: Finished difference Result 130 states and 321 transitions. [2021-09-22 14:25:56,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-09-22 14:25:56,670 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 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 28 [2021-09-22 14:25:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:56,671 INFO L225 Difference]: With dead ends: 130 [2021-09-22 14:25:56,671 INFO L226 Difference]: Without dead ends: 118 [2021-09-22 14:25:56,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 736.0ms TimeCoverageRelationStatistics Valid=1361, Invalid=3061, Unknown=0, NotChecked=0, Total=4422 [2021-09-22 14:25:56,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-09-22 14:25:56,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 70. [2021-09-22 14:25:56,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.4927536231884058) internal successors, (172), 69 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:56,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2021-09-22 14:25:56,673 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 28 [2021-09-22 14:25:56,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:56,673 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2021-09-22 14:25:56,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 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) [2021-09-22 14:25:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2021-09-22 14:25:56,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-09-22 14:25:56,674 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:56,674 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:56,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:56,880 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,SelfDestructingSolverStorable27 [2021-09-22 14:25:56,881 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:56,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:56,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1168061287, now seen corresponding path program 27 times [2021-09-22 14:25:56,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:56,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837523944] [2021-09-22 14:25:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:56,881 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:56,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:57,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:57,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837523944] [2021-09-22 14:25:57,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837523944] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:57,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73649867] [2021-09-22 14:25:57,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-09-22 14:25:57,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:57,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:57,069 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) [2021-09-22 14:25:57,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-09-22 14:25:57,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-09-22 14:25:57,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:57,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 27 conjunts are in the unsatisfiable core [2021-09-22 14:25:57,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:57,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73649867] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:57,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:57,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-09-22 14:25:57,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847040519] [2021-09-22 14:25:57,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-09-22 14:25:57,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:57,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-09-22 14:25:57,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2021-09-22 14:25:57,414 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2021-09-22 14:25:58,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:58,167 INFO L93 Difference]: Finished difference Result 134 states and 331 transitions. [2021-09-22 14:25:58,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-09-22 14:25:58,168 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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 29 [2021-09-22 14:25:58,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:58,168 INFO L225 Difference]: With dead ends: 134 [2021-09-22 14:25:58,168 INFO L226 Difference]: Without dead ends: 122 [2021-09-22 14:25:58,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 752.7ms TimeCoverageRelationStatistics Valid=1484, Invalid=3346, Unknown=0, NotChecked=0, Total=4830 [2021-09-22 14:25:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-09-22 14:25:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 74. [2021-09-22 14:25:58,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.4794520547945207) internal successors, (181), 73 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:58,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2021-09-22 14:25:58,171 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 29 [2021-09-22 14:25:58,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:58,171 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2021-09-22 14:25:58,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2021-09-22 14:25:58,171 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2021-09-22 14:25:58,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-09-22 14:25:58,172 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:58,172 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:58,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-09-22 14:25:58,380 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,SelfDestructingSolverStorable28 [2021-09-22 14:25:58,381 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:25:58,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:25:58,381 INFO L82 PathProgramCache]: Analyzing trace with hash 283610275, now seen corresponding path program 28 times [2021-09-22 14:25:58,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:25:58,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649526817] [2021-09-22 14:25:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:25:58,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:25:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:25:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:58,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:25:58,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649526817] [2021-09-22 14:25:58,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649526817] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:58,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573546290] [2021-09-22 14:25:58,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-09-22 14:25:58,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:25:58,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:25:58,602 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) [2021-09-22 14:25:58,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-09-22 14:25:58,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-09-22 14:25:58,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:25:58,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 28 conjunts are in the unsatisfiable core [2021-09-22 14:25:58,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:25:58,953 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:25:58,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573546290] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:25:58,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:25:58,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-09-22 14:25:58,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461301792] [2021-09-22 14:25:58,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-09-22 14:25:58,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:25:58,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-09-22 14:25:58,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2021-09-22 14:25:58,955 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) [2021-09-22 14:25:59,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:25:59,787 INFO L93 Difference]: Finished difference Result 138 states and 341 transitions. [2021-09-22 14:25:59,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-09-22 14:25:59,787 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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 30 [2021-09-22 14:25:59,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:25:59,788 INFO L225 Difference]: With dead ends: 138 [2021-09-22 14:25:59,788 INFO L226 Difference]: Without dead ends: 126 [2021-09-22 14:25:59,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1382 ImplicationChecksByTransitivity, 846.4ms TimeCoverageRelationStatistics Valid=1616, Invalid=3640, Unknown=0, NotChecked=0, Total=5256 [2021-09-22 14:25:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-09-22 14:25:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 74. [2021-09-22 14:25:59,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.493150684931507) internal successors, (182), 73 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:25:59,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2021-09-22 14:25:59,791 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 30 [2021-09-22 14:25:59,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:25:59,791 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2021-09-22 14:25:59,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 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) [2021-09-22 14:25:59,791 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2021-09-22 14:25:59,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-09-22 14:25:59,791 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:25:59,791 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:25:59,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:00,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:00,001 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:00,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1520724969, now seen corresponding path program 29 times [2021-09-22 14:26:00,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:00,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227463381] [2021-09-22 14:26:00,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:00,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:00,212 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:00,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:00,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227463381] [2021-09-22 14:26:00,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227463381] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:00,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512688489] [2021-09-22 14:26:00,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-09-22 14:26:00,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:00,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:00,213 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) [2021-09-22 14:26:00,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-09-22 14:26:00,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-09-22 14:26:00,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:00,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 29 conjunts are in the unsatisfiable core [2021-09-22 14:26:00,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:00,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512688489] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:00,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:00,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 27 [2021-09-22 14:26:00,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293367282] [2021-09-22 14:26:00,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-09-22 14:26:00,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:00,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-09-22 14:26:00,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2021-09-22 14:26:00,602 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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) [2021-09-22 14:26:01,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:01,494 INFO L93 Difference]: Finished difference Result 154 states and 376 transitions. [2021-09-22 14:26:01,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-09-22 14:26:01,494 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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 31 [2021-09-22 14:26:01,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:01,495 INFO L225 Difference]: With dead ends: 154 [2021-09-22 14:26:01,495 INFO L226 Difference]: Without dead ends: 140 [2021-09-22 14:26:01,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 901.8ms TimeCoverageRelationStatistics Valid=1807, Invalid=4199, Unknown=0, NotChecked=0, Total=6006 [2021-09-22 14:26:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-09-22 14:26:01,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2021-09-22 14:26:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.605769230769231) internal successors, (271), 104 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 271 transitions. [2021-09-22 14:26:01,498 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 271 transitions. Word has length 31 [2021-09-22 14:26:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:01,498 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 271 transitions. [2021-09-22 14:26:01,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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) [2021-09-22 14:26:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 271 transitions. [2021-09-22 14:26:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-09-22 14:26:01,498 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:01,498 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:01,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:01,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:01,709 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:01,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:01,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1966827045, now seen corresponding path program 30 times [2021-09-22 14:26:01,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:01,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101332676] [2021-09-22 14:26:01,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:01,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:01,909 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:01,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:01,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101332676] [2021-09-22 14:26:01,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101332676] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:01,909 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192189685] [2021-09-22 14:26:01,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-09-22 14:26:01,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:01,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:01,910 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) [2021-09-22 14:26:01,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-09-22 14:26:02,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-09-22 14:26:02,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 30 conjunts are in the unsatisfiable core [2021-09-22 14:26:02,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:02,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192189685] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:02,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:02,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-09-22 14:26:02,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863869278] [2021-09-22 14:26:02,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-09-22 14:26:02,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:02,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-09-22 14:26:02,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2021-09-22 14:26:02,281 INFO L87 Difference]: Start difference. First operand 105 states and 271 transitions. Second operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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) [2021-09-22 14:26:03,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:03,013 INFO L93 Difference]: Finished difference Result 148 states and 365 transitions. [2021-09-22 14:26:03,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-09-22 14:26:03,014 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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 32 [2021-09-22 14:26:03,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:03,015 INFO L225 Difference]: With dead ends: 148 [2021-09-22 14:26:03,015 INFO L226 Difference]: Without dead ends: 134 [2021-09-22 14:26:03,015 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 743.1ms TimeCoverageRelationStatistics Valid=1893, Invalid=4269, Unknown=0, NotChecked=0, Total=6162 [2021-09-22 14:26:03,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-09-22 14:26:03,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 78. [2021-09-22 14:26:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.4935064935064934) internal successors, (192), 77 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2021-09-22 14:26:03,018 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 32 [2021-09-22 14:26:03,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:03,018 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2021-09-22 14:26:03,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 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) [2021-09-22 14:26:03,018 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2021-09-22 14:26:03,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-09-22 14:26:03,018 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:03,018 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:03,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:03,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:03,235 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:03,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:03,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1128106987, now seen corresponding path program 31 times [2021-09-22 14:26:03,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:03,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157810282] [2021-09-22 14:26:03,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:03,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:03,443 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:03,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:03,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157810282] [2021-09-22 14:26:03,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157810282] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:03,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742065729] [2021-09-22 14:26:03,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-09-22 14:26:03,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:03,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:03,445 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) [2021-09-22 14:26:03,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-09-22 14:26:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:03,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 31 conjunts are in the unsatisfiable core [2021-09-22 14:26:03,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:03,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742065729] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:03,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:03,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-09-22 14:26:03,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532050637] [2021-09-22 14:26:03,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-09-22 14:26:03,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:03,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-09-22 14:26:03,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2021-09-22 14:26:03,860 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2021-09-22 14:26:04,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:04,895 INFO L93 Difference]: Finished difference Result 150 states and 371 transitions. [2021-09-22 14:26:04,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-09-22 14:26:04,895 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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 33 [2021-09-22 14:26:04,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:04,896 INFO L225 Difference]: With dead ends: 150 [2021-09-22 14:26:04,896 INFO L226 Difference]: Without dead ends: 138 [2021-09-22 14:26:04,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 1027.3ms TimeCoverageRelationStatistics Valid=2038, Invalid=4604, Unknown=0, NotChecked=0, Total=6642 [2021-09-22 14:26:04,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-09-22 14:26:04,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2021-09-22 14:26:04,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.4814814814814814) internal successors, (201), 81 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:04,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2021-09-22 14:26:04,900 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 33 [2021-09-22 14:26:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:04,900 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2021-09-22 14:26:04,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2021-09-22 14:26:04,900 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2021-09-22 14:26:04,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-09-22 14:26:04,901 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:04,901 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:04,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:05,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:05,101 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:05,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:05,102 INFO L82 PathProgramCache]: Analyzing trace with hash 335472423, now seen corresponding path program 32 times [2021-09-22 14:26:05,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:05,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818815146] [2021-09-22 14:26:05,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:05,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:05,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:05,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818815146] [2021-09-22 14:26:05,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818815146] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:05,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731359549] [2021-09-22 14:26:05,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-09-22 14:26:05,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:05,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:05,375 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) [2021-09-22 14:26:05,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-09-22 14:26:05,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-09-22 14:26:05,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:05,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 32 conjunts are in the unsatisfiable core [2021-09-22 14:26:05,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:05,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731359549] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:05,810 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:05,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-09-22 14:26:05,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654980849] [2021-09-22 14:26:05,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-09-22 14:26:05,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:05,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-09-22 14:26:05,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=713, Unknown=0, NotChecked=0, Total=930 [2021-09-22 14:26:05,812 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-09-22 14:26:06,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:06,963 INFO L93 Difference]: Finished difference Result 154 states and 381 transitions. [2021-09-22 14:26:06,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-09-22 14:26:06,964 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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 34 [2021-09-22 14:26:06,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:06,964 INFO L225 Difference]: With dead ends: 154 [2021-09-22 14:26:06,964 INFO L226 Difference]: Without dead ends: 142 [2021-09-22 14:26:06,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1920 ImplicationChecksByTransitivity, 1153.0ms TimeCoverageRelationStatistics Valid=2192, Invalid=4948, Unknown=0, NotChecked=0, Total=7140 [2021-09-22 14:26:06,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-09-22 14:26:06,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 82. [2021-09-22 14:26:06,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.493827160493827) internal successors, (202), 81 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:06,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 202 transitions. [2021-09-22 14:26:06,967 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 202 transitions. Word has length 34 [2021-09-22 14:26:06,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:06,967 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 202 transitions. [2021-09-22 14:26:06,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2021-09-22 14:26:06,967 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 202 transitions. [2021-09-22 14:26:06,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-09-22 14:26:06,967 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:06,967 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:06,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:07,168 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,SelfDestructingSolverStorable33 [2021-09-22 14:26:07,168 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:07,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:07,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1779348333, now seen corresponding path program 33 times [2021-09-22 14:26:07,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:07,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588335589] [2021-09-22 14:26:07,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:07,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:07,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:07,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588335589] [2021-09-22 14:26:07,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588335589] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:07,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943241879] [2021-09-22 14:26:07,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-09-22 14:26:07,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:07,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:07,453 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) [2021-09-22 14:26:07,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-09-22 14:26:07,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-09-22 14:26:07,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:07,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 33 conjunts are in the unsatisfiable core [2021-09-22 14:26:07,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:07,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943241879] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:07,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:07,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 31 [2021-09-22 14:26:07,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338754160] [2021-09-22 14:26:07,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-09-22 14:26:07,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:07,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-09-22 14:26:07,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=821, Unknown=0, NotChecked=0, Total=1056 [2021-09-22 14:26:07,933 INFO L87 Difference]: Start difference. First operand 82 states and 202 transitions. Second operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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) [2021-09-22 14:26:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:09,028 INFO L93 Difference]: Finished difference Result 170 states and 416 transitions. [2021-09-22 14:26:09,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-09-22 14:26:09,028 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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 35 [2021-09-22 14:26:09,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:09,029 INFO L225 Difference]: With dead ends: 170 [2021-09-22 14:26:09,029 INFO L226 Difference]: Without dead ends: 156 [2021-09-22 14:26:09,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2256 ImplicationChecksByTransitivity, 1147.3ms TimeCoverageRelationStatistics Valid=2413, Invalid=5597, Unknown=0, NotChecked=0, Total=8010 [2021-09-22 14:26:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-09-22 14:26:09,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2021-09-22 14:26:09,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.6120689655172415) internal successors, (303), 116 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:09,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 303 transitions. [2021-09-22 14:26:09,032 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 303 transitions. Word has length 35 [2021-09-22 14:26:09,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:09,032 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 303 transitions. [2021-09-22 14:26:09,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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) [2021-09-22 14:26:09,033 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 303 transitions. [2021-09-22 14:26:09,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-09-22 14:26:09,033 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:09,033 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:09,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:09,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:09,250 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:09,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:09,250 INFO L82 PathProgramCache]: Analyzing trace with hash 266743721, now seen corresponding path program 34 times [2021-09-22 14:26:09,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:09,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990692917] [2021-09-22 14:26:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:09,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:09,492 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:09,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:09,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990692917] [2021-09-22 14:26:09,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990692917] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:09,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357779196] [2021-09-22 14:26:09,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-09-22 14:26:09,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:09,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:09,494 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) [2021-09-22 14:26:09,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-09-22 14:26:09,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-09-22 14:26:09,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:09,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 34 conjunts are in the unsatisfiable core [2021-09-22 14:26:09,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:09,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357779196] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:09,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:09,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-09-22 14:26:09,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521073447] [2021-09-22 14:26:09,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-09-22 14:26:09,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:09,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-09-22 14:26:09,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-09-22 14:26:09,885 INFO L87 Difference]: Start difference. First operand 117 states and 303 transitions. Second operand has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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) [2021-09-22 14:26:10,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:10,674 INFO L93 Difference]: Finished difference Result 164 states and 405 transitions. [2021-09-22 14:26:10,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-09-22 14:26:10,675 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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 36 [2021-09-22 14:26:10,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:10,675 INFO L225 Difference]: With dead ends: 164 [2021-09-22 14:26:10,675 INFO L226 Difference]: Without dead ends: 150 [2021-09-22 14:26:10,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2222 ImplicationChecksByTransitivity, 837.0ms TimeCoverageRelationStatistics Valid=2513, Invalid=5677, Unknown=0, NotChecked=0, Total=8190 [2021-09-22 14:26:10,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-09-22 14:26:10,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 86. [2021-09-22 14:26:10,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.4941176470588236) internal successors, (212), 85 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 212 transitions. [2021-09-22 14:26:10,678 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 212 transitions. Word has length 36 [2021-09-22 14:26:10,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:10,678 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 212 transitions. [2021-09-22 14:26:10,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.1875) internal successors, (38), 32 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) [2021-09-22 14:26:10,678 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 212 transitions. [2021-09-22 14:26:10,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-09-22 14:26:10,679 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:10,679 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:10,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-09-22 14:26:10,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:10,896 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:10,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:10,896 INFO L82 PathProgramCache]: Analyzing trace with hash 557056623, now seen corresponding path program 35 times [2021-09-22 14:26:10,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:10,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664919925] [2021-09-22 14:26:10,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:10,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:11,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:11,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664919925] [2021-09-22 14:26:11,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664919925] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:11,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006325100] [2021-09-22 14:26:11,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-09-22 14:26:11,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:11,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:11,102 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) [2021-09-22 14:26:11,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-09-22 14:26:11,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-09-22 14:26:11,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:11,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 35 conjunts are in the unsatisfiable core [2021-09-22 14:26:11,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:11,549 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:11,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006325100] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:11,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:11,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-09-22 14:26:11,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047755518] [2021-09-22 14:26:11,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-09-22 14:26:11,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:11,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-09-22 14:26:11,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2021-09-22 14:26:11,551 INFO L87 Difference]: Start difference. First operand 86 states and 212 transitions. Second operand has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 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) [2021-09-22 14:26:12,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:12,344 INFO L93 Difference]: Finished difference Result 166 states and 411 transitions. [2021-09-22 14:26:12,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-09-22 14:26:12,345 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 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 37 [2021-09-22 14:26:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:12,345 INFO L225 Difference]: With dead ends: 166 [2021-09-22 14:26:12,345 INFO L226 Difference]: Without dead ends: 154 [2021-09-22 14:26:12,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 821.2ms TimeCoverageRelationStatistics Valid=2680, Invalid=6062, Unknown=0, NotChecked=0, Total=8742 [2021-09-22 14:26:12,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-09-22 14:26:12,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 90. [2021-09-22 14:26:12,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.4831460674157304) internal successors, (221), 89 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 221 transitions. [2021-09-22 14:26:12,348 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 221 transitions. Word has length 37 [2021-09-22 14:26:12,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:12,350 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 221 transitions. [2021-09-22 14:26:12,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 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) [2021-09-22 14:26:12,350 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 221 transitions. [2021-09-22 14:26:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-09-22 14:26:12,350 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:12,350 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:12,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:12,567 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,SelfDestructingSolverStorable36 [2021-09-22 14:26:12,568 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:12,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1357029461, now seen corresponding path program 36 times [2021-09-22 14:26:12,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:12,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557247425] [2021-09-22 14:26:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:12,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:12,945 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:12,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:12,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557247425] [2021-09-22 14:26:12,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557247425] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:12,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824366658] [2021-09-22 14:26:12,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-09-22 14:26:12,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:12,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:12,947 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) [2021-09-22 14:26:12,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-09-22 14:26:13,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-09-22 14:26:13,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:13,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 36 conjunts are in the unsatisfiable core [2021-09-22 14:26:13,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:13,477 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:13,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824366658] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:13,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:13,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-09-22 14:26:13,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546131507] [2021-09-22 14:26:13,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-09-22 14:26:13,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:13,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-09-22 14:26:13,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2021-09-22 14:26:13,479 INFO L87 Difference]: Start difference. First operand 90 states and 221 transitions. Second operand has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 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) [2021-09-22 14:26:14,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:14,716 INFO L93 Difference]: Finished difference Result 170 states and 421 transitions. [2021-09-22 14:26:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-09-22 14:26:14,717 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 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 38 [2021-09-22 14:26:14,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:14,717 INFO L225 Difference]: With dead ends: 170 [2021-09-22 14:26:14,717 INFO L226 Difference]: Without dead ends: 158 [2021-09-22 14:26:14,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2546 ImplicationChecksByTransitivity, 1349.2ms TimeCoverageRelationStatistics Valid=2856, Invalid=6456, Unknown=0, NotChecked=0, Total=9312 [2021-09-22 14:26:14,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-09-22 14:26:14,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2021-09-22 14:26:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.49438202247191) internal successors, (222), 89 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 222 transitions. [2021-09-22 14:26:14,720 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 222 transitions. Word has length 38 [2021-09-22 14:26:14,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:14,720 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 222 transitions. [2021-09-22 14:26:14,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 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) [2021-09-22 14:26:14,720 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 222 transitions. [2021-09-22 14:26:14,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-09-22 14:26:14,721 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:14,721 INFO L512 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:14,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:14,935 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,SelfDestructingSolverStorable37 [2021-09-22 14:26:14,935 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:14,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:14,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1539204879, now seen corresponding path program 37 times [2021-09-22 14:26:14,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:14,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818423330] [2021-09-22 14:26:14,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:14,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:15,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:15,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818423330] [2021-09-22 14:26:15,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818423330] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:15,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61498551] [2021-09-22 14:26:15,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-09-22 14:26:15,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:15,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:15,181 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) [2021-09-22 14:26:15,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-09-22 14:26:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:15,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 37 conjunts are in the unsatisfiable core [2021-09-22 14:26:15,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:15,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61498551] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:15,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:15,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 35 [2021-09-22 14:26:15,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512575430] [2021-09-22 14:26:15,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-09-22 14:26:15,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:15,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-09-22 14:26:15,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1033, Unknown=0, NotChecked=0, Total=1332 [2021-09-22 14:26:15,687 INFO L87 Difference]: Start difference. First operand 90 states and 222 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-09-22 14:26:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:16,576 INFO L93 Difference]: Finished difference Result 186 states and 456 transitions. [2021-09-22 14:26:16,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-09-22 14:26:16,576 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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 39 [2021-09-22 14:26:16,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:16,577 INFO L225 Difference]: With dead ends: 186 [2021-09-22 14:26:16,577 INFO L226 Difference]: Without dead ends: 172 [2021-09-22 14:26:16,578 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 935.5ms TimeCoverageRelationStatistics Valid=3107, Invalid=7195, Unknown=0, NotChecked=0, Total=10302 [2021-09-22 14:26:16,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-09-22 14:26:16,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 129. [2021-09-22 14:26:16,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.6171875) internal successors, (335), 128 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:16,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 335 transitions. [2021-09-22 14:26:16,581 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 335 transitions. Word has length 39 [2021-09-22 14:26:16,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:16,581 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 335 transitions. [2021-09-22 14:26:16,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-09-22 14:26:16,581 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 335 transitions. [2021-09-22 14:26:16,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-09-22 14:26:16,581 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:16,582 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:16,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:16,798 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,SelfDestructingSolverStorable38 [2021-09-22 14:26:16,799 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:16,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1565038381, now seen corresponding path program 38 times [2021-09-22 14:26:16,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:16,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541246305] [2021-09-22 14:26:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:16,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:17,165 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:17,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:17,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541246305] [2021-09-22 14:26:17,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541246305] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:17,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270744838] [2021-09-22 14:26:17,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-09-22 14:26:17,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:17,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:17,167 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) [2021-09-22 14:26:17,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-09-22 14:26:17,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-09-22 14:26:17,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:17,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 38 conjunts are in the unsatisfiable core [2021-09-22 14:26:17,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:17,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270744838] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:17,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:17,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-09-22 14:26:17,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679451877] [2021-09-22 14:26:17,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-09-22 14:26:17,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:17,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-09-22 14:26:17,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1019, Unknown=0, NotChecked=0, Total=1332 [2021-09-22 14:26:17,674 INFO L87 Difference]: Start difference. First operand 129 states and 335 transitions. Second operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-09-22 14:26:18,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:18,655 INFO L93 Difference]: Finished difference Result 180 states and 445 transitions. [2021-09-22 14:26:18,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-09-22 14:26:18,656 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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 40 [2021-09-22 14:26:18,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:18,656 INFO L225 Difference]: With dead ends: 180 [2021-09-22 14:26:18,656 INFO L226 Difference]: Without dead ends: 166 [2021-09-22 14:26:18,657 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2892 ImplicationChecksByTransitivity, 1094.5ms TimeCoverageRelationStatistics Valid=3221, Invalid=7285, Unknown=0, NotChecked=0, Total=10506 [2021-09-22 14:26:18,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-09-22 14:26:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 94. [2021-09-22 14:26:18,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.4946236559139785) internal successors, (232), 93 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:18,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2021-09-22 14:26:18,659 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 40 [2021-09-22 14:26:18,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:18,659 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2021-09-22 14:26:18,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 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) [2021-09-22 14:26:18,660 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2021-09-22 14:26:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-09-22 14:26:18,660 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:18,660 INFO L512 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:18,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:18,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-09-22 14:26:18,877 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:18,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:18,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1706846477, now seen corresponding path program 39 times [2021-09-22 14:26:18,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:18,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707599034] [2021-09-22 14:26:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:18,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:19,260 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:19,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:19,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707599034] [2021-09-22 14:26:19,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707599034] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:19,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187020400] [2021-09-22 14:26:19,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-09-22 14:26:19,261 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:19,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:19,261 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) [2021-09-22 14:26:19,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-09-22 14:26:19,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-09-22 14:26:19,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:19,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 39 conjunts are in the unsatisfiable core [2021-09-22 14:26:19,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:19,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187020400] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:19,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:19,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-09-22 14:26:19,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899067950] [2021-09-22 14:26:19,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-09-22 14:26:19,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:19,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-09-22 14:26:19,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1075, Unknown=0, NotChecked=0, Total=1406 [2021-09-22 14:26:19,786 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 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) [2021-09-22 14:26:20,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:20,709 INFO L93 Difference]: Finished difference Result 182 states and 451 transitions. [2021-09-22 14:26:20,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-09-22 14:26:20,709 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 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 41 [2021-09-22 14:26:20,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:20,710 INFO L225 Difference]: With dead ends: 182 [2021-09-22 14:26:20,710 INFO L226 Difference]: Without dead ends: 170 [2021-09-22 14:26:20,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3173 ImplicationChecksByTransitivity, 1090.3ms TimeCoverageRelationStatistics Valid=3410, Invalid=7720, Unknown=0, NotChecked=0, Total=11130 [2021-09-22 14:26:20,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-09-22 14:26:20,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 98. [2021-09-22 14:26:20,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.484536082474227) internal successors, (241), 97 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2021-09-22 14:26:20,713 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 41 [2021-09-22 14:26:20,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:20,713 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2021-09-22 14:26:20,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 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) [2021-09-22 14:26:20,713 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2021-09-22 14:26:20,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-09-22 14:26:20,714 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:20,714 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:20,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-09-22 14:26:20,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:20,929 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:20,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:20,929 INFO L82 PathProgramCache]: Analyzing trace with hash 763622959, now seen corresponding path program 40 times [2021-09-22 14:26:20,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:20,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354009243] [2021-09-22 14:26:20,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:20,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:21,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:21,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354009243] [2021-09-22 14:26:21,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354009243] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:21,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873199605] [2021-09-22 14:26:21,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-09-22 14:26:21,294 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:21,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:21,295 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) [2021-09-22 14:26:21,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-09-22 14:26:21,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-09-22 14:26:21,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:21,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 40 conjunts are in the unsatisfiable core [2021-09-22 14:26:21,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:21,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873199605] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:21,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:21,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-09-22 14:26:21,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620862922] [2021-09-22 14:26:21,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-09-22 14:26:21,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:21,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-09-22 14:26:21,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2021-09-22 14:26:21,839 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 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) [2021-09-22 14:26:23,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:23,248 INFO L93 Difference]: Finished difference Result 186 states and 461 transitions. [2021-09-22 14:26:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-09-22 14:26:23,249 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 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 42 [2021-09-22 14:26:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:23,249 INFO L225 Difference]: With dead ends: 186 [2021-09-22 14:26:23,250 INFO L226 Difference]: Without dead ends: 174 [2021-09-22 14:26:23,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3260 ImplicationChecksByTransitivity, 1493.5ms TimeCoverageRelationStatistics Valid=3608, Invalid=8164, Unknown=0, NotChecked=0, Total=11772 [2021-09-22 14:26:23,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-09-22 14:26:23,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 98. [2021-09-22 14:26:23,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.4948453608247423) internal successors, (242), 97 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:23,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 242 transitions. [2021-09-22 14:26:23,253 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 242 transitions. Word has length 42 [2021-09-22 14:26:23,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:23,253 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 242 transitions. [2021-09-22 14:26:23,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 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) [2021-09-22 14:26:23,253 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 242 transitions. [2021-09-22 14:26:23,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-09-22 14:26:23,253 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:23,253 INFO L512 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:23,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:23,470 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,SelfDestructingSolverStorable41 [2021-09-22 14:26:23,471 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:23,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash 398335093, now seen corresponding path program 41 times [2021-09-22 14:26:23,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:23,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752139463] [2021-09-22 14:26:23,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:23,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:23,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:23,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752139463] [2021-09-22 14:26:23,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752139463] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:23,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663330199] [2021-09-22 14:26:23,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-09-22 14:26:23,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:23,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:23,875 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) [2021-09-22 14:26:23,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-09-22 14:26:24,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-09-22 14:26:24,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:24,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 41 conjunts are in the unsatisfiable core [2021-09-22 14:26:24,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:24,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663330199] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:24,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:24,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-09-22 14:26:24,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988631968] [2021-09-22 14:26:24,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-09-22 14:26:24,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:24,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-09-22 14:26:24,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=1192, Unknown=0, NotChecked=0, Total=1560 [2021-09-22 14:26:24,487 INFO L87 Difference]: Start difference. First operand 98 states and 242 transitions. Second operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 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) [2021-09-22 14:26:26,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:26,108 INFO L93 Difference]: Finished difference Result 190 states and 471 transitions. [2021-09-22 14:26:26,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-09-22 14:26:26,108 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 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 43 [2021-09-22 14:26:26,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:26,115 INFO L225 Difference]: With dead ends: 190 [2021-09-22 14:26:26,115 INFO L226 Difference]: Without dead ends: 178 [2021-09-22 14:26:26,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3560 ImplicationChecksByTransitivity, 1723.1ms TimeCoverageRelationStatistics Valid=3808, Invalid=8624, Unknown=0, NotChecked=0, Total=12432 [2021-09-22 14:26:26,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-09-22 14:26:26,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 102. [2021-09-22 14:26:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.485148514851485) internal successors, (251), 101 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 251 transitions. [2021-09-22 14:26:26,118 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 251 transitions. Word has length 43 [2021-09-22 14:26:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:26,118 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 251 transitions. [2021-09-22 14:26:26,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 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) [2021-09-22 14:26:26,118 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 251 transitions. [2021-09-22 14:26:26,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-09-22 14:26:26,119 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:26,119 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:26,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:26,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-09-22 14:26:26,329 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:26,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:26,329 INFO L82 PathProgramCache]: Analyzing trace with hash -597451599, now seen corresponding path program 42 times [2021-09-22 14:26:26,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:26,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432598924] [2021-09-22 14:26:26,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:26,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:26,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:26,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432598924] [2021-09-22 14:26:26,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432598924] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:26,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023406692] [2021-09-22 14:26:26,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-09-22 14:26:26,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:26,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:26,746 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) [2021-09-22 14:26:26,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-09-22 14:26:27,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-09-22 14:26:27,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:27,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 42 conjunts are in the unsatisfiable core [2021-09-22 14:26:27,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:27,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023406692] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:27,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:27,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 40 [2021-09-22 14:26:27,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160527055] [2021-09-22 14:26:27,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-09-22 14:26:27,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:27,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-09-22 14:26:27,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=1332, Unknown=0, NotChecked=0, Total=1722 [2021-09-22 14:26:27,417 INFO L87 Difference]: Start difference. First operand 102 states and 251 transitions. Second operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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) [2021-09-22 14:26:29,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:29,211 INFO L93 Difference]: Finished difference Result 210 states and 515 transitions. [2021-09-22 14:26:29,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-09-22 14:26:29,212 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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 44 [2021-09-22 14:26:29,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:29,212 INFO L225 Difference]: With dead ends: 210 [2021-09-22 14:26:29,212 INFO L226 Difference]: Without dead ends: 196 [2021-09-22 14:26:29,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3796 ImplicationChecksByTransitivity, 1905.3ms TimeCoverageRelationStatistics Valid=4100, Invalid=9472, Unknown=0, NotChecked=0, Total=13572 [2021-09-22 14:26:29,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-09-22 14:26:29,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2021-09-22 14:26:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.6223776223776225) internal successors, (375), 143 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 375 transitions. [2021-09-22 14:26:29,216 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 375 transitions. Word has length 44 [2021-09-22 14:26:29,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:29,216 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 375 transitions. [2021-09-22 14:26:29,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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) [2021-09-22 14:26:29,216 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 375 transitions. [2021-09-22 14:26:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-09-22 14:26:29,216 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:29,216 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:29,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:29,424 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,SelfDestructingSolverStorable43 [2021-09-22 14:26:29,425 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:29,425 INFO L82 PathProgramCache]: Analyzing trace with hash 548227447, now seen corresponding path program 43 times [2021-09-22 14:26:29,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:29,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087756447] [2021-09-22 14:26:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:29,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:29,874 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:29,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:29,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087756447] [2021-09-22 14:26:29,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087756447] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:29,875 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377047744] [2021-09-22 14:26:29,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-09-22 14:26:29,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:29,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:29,876 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) [2021-09-22 14:26:29,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-09-22 14:26:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:30,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 43 conjunts are in the unsatisfiable core [2021-09-22 14:26:30,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:30,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377047744] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:30,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:30,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-09-22 14:26:30,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947601088] [2021-09-22 14:26:30,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-09-22 14:26:30,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:30,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-09-22 14:26:30,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1315, Unknown=0, NotChecked=0, Total=1722 [2021-09-22 14:26:30,537 INFO L87 Difference]: Start difference. First operand 144 states and 375 transitions. Second operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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) [2021-09-22 14:26:32,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:32,331 INFO L93 Difference]: Finished difference Result 200 states and 495 transitions. [2021-09-22 14:26:32,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-09-22 14:26:32,331 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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 45 [2021-09-22 14:26:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:32,332 INFO L225 Difference]: With dead ends: 200 [2021-09-22 14:26:32,332 INFO L226 Difference]: Without dead ends: 188 [2021-09-22 14:26:32,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3969 ImplicationChecksByTransitivity, 1921.1ms TimeCoverageRelationStatistics Valid=4228, Invalid=9578, Unknown=0, NotChecked=0, Total=13806 [2021-09-22 14:26:32,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-09-22 14:26:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 147. [2021-09-22 14:26:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.6232876712328768) internal successors, (383), 146 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 383 transitions. [2021-09-22 14:26:32,335 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 383 transitions. Word has length 45 [2021-09-22 14:26:32,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:32,335 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 383 transitions. [2021-09-22 14:26:32,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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) [2021-09-22 14:26:32,335 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 383 transitions. [2021-09-22 14:26:32,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-09-22 14:26:32,336 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:32,336 INFO L512 BasicCegarLoop]: trace histogram [20, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:32,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:32,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:32,545 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:32,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:32,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1374921521, now seen corresponding path program 44 times [2021-09-22 14:26:32,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:32,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652089247] [2021-09-22 14:26:32,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:32,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:32,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:26:33,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:33,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652089247] [2021-09-22 14:26:33,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652089247] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:33,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129714666] [2021-09-22 14:26:33,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-09-22 14:26:33,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:33,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:33,021 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) [2021-09-22 14:26:33,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-09-22 14:26:33,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-09-22 14:26:33,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:33,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 43 conjunts are in the unsatisfiable core [2021-09-22 14:26:33,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-09-22 14:26:33,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129714666] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:33,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:33,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 41 [2021-09-22 14:26:33,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139760509] [2021-09-22 14:26:33,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-09-22 14:26:33,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:33,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-09-22 14:26:33,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2021-09-22 14:26:33,686 INFO L87 Difference]: Start difference. First operand 147 states and 383 transitions. Second operand has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 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) [2021-09-22 14:26:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:34,842 INFO L93 Difference]: Finished difference Result 212 states and 522 transitions. [2021-09-22 14:26:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-09-22 14:26:34,842 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 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 46 [2021-09-22 14:26:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:34,843 INFO L225 Difference]: With dead ends: 212 [2021-09-22 14:26:34,843 INFO L226 Difference]: Without dead ends: 201 [2021-09-22 14:26:34,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3747 ImplicationChecksByTransitivity, 1413.6ms TimeCoverageRelationStatistics Valid=4185, Invalid=9387, Unknown=0, NotChecked=0, Total=13572 [2021-09-22 14:26:34,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-09-22 14:26:34,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 188. [2021-09-22 14:26:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.4973262032085564) internal successors, (467), 187 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 467 transitions. [2021-09-22 14:26:34,847 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 467 transitions. Word has length 46 [2021-09-22 14:26:34,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:34,847 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 467 transitions. [2021-09-22 14:26:34,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 42 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) [2021-09-22 14:26:34,847 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 467 transitions. [2021-09-22 14:26:34,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-09-22 14:26:34,848 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:34,848 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:34,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:35,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:35,065 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:35,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:35,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1434108423, now seen corresponding path program 45 times [2021-09-22 14:26:35,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:35,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008125388] [2021-09-22 14:26:35,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:35,066 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:35,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:35,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008125388] [2021-09-22 14:26:35,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008125388] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:35,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871341909] [2021-09-22 14:26:35,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-09-22 14:26:35,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:35,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:35,400 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) [2021-09-22 14:26:35,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-09-22 14:26:35,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2021-09-22 14:26:35,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:35,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 45 conjunts are in the unsatisfiable core [2021-09-22 14:26:35,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:36,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871341909] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:36,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:36,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-09-22 14:26:36,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108838743] [2021-09-22 14:26:36,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-09-22 14:26:36,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:36,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-09-22 14:26:36,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=1444, Unknown=0, NotChecked=0, Total=1892 [2021-09-22 14:26:36,107 INFO L87 Difference]: Start difference. First operand 188 states and 467 transitions. Second operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 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) [2021-09-22 14:26:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:37,344 INFO L93 Difference]: Finished difference Result 207 states and 513 transitions. [2021-09-22 14:26:37,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-09-22 14:26:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 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 47 [2021-09-22 14:26:37,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:37,345 INFO L225 Difference]: With dead ends: 207 [2021-09-22 14:26:37,345 INFO L226 Difference]: Without dead ends: 195 [2021-09-22 14:26:37,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4400 ImplicationChecksByTransitivity, 1314.3ms TimeCoverageRelationStatistics Valid=4670, Invalid=10582, Unknown=0, NotChecked=0, Total=15252 [2021-09-22 14:26:37,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-09-22 14:26:37,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2021-09-22 14:26:37,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.4973821989528795) internal successors, (477), 191 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:37,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 477 transitions. [2021-09-22 14:26:37,349 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 477 transitions. Word has length 47 [2021-09-22 14:26:37,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:37,349 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 477 transitions. [2021-09-22 14:26:37,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 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) [2021-09-22 14:26:37,349 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 477 transitions. [2021-09-22 14:26:37,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-09-22 14:26:37,350 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:37,350 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:37,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-09-22 14:26:37,568 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,SelfDestructingSolverStorable46 [2021-09-22 14:26:37,568 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:37,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:37,569 INFO L82 PathProgramCache]: Analyzing trace with hash -327037149, now seen corresponding path program 46 times [2021-09-22 14:26:37,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:37,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850251890] [2021-09-22 14:26:37,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:37,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-09-22 14:26:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:38,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-09-22 14:26:38,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850251890] [2021-09-22 14:26:38,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850251890] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:38,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401340692] [2021-09-22 14:26:38,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-09-22 14:26:38,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-09-22 14:26:38,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-09-22 14:26:38,080 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) [2021-09-22 14:26:38,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-09-22 14:26:38,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-09-22 14:26:38,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-09-22 14:26:38,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 45 conjunts are in the unsatisfiable core [2021-09-22 14:26:38,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-09-22 14:26:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-09-22 14:26:38,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401340692] provided 0 perfect and 1 imperfect interpolant sequences [2021-09-22 14:26:38,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-09-22 14:26:38,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 43 [2021-09-22 14:26:38,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564042673] [2021-09-22 14:26:38,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-09-22 14:26:38,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-09-22 14:26:38,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-09-22 14:26:38,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1528, Unknown=0, NotChecked=0, Total=1980 [2021-09-22 14:26:38,791 INFO L87 Difference]: Start difference. First operand 192 states and 477 transitions. Second operand has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 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) [2021-09-22 14:26:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-09-22 14:26:40,078 INFO L93 Difference]: Finished difference Result 213 states and 527 transitions. [2021-09-22 14:26:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-09-22 14:26:40,078 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 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 47 [2021-09-22 14:26:40,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-09-22 14:26:40,079 INFO L225 Difference]: With dead ends: 213 [2021-09-22 14:26:40,079 INFO L226 Difference]: Without dead ends: 198 [2021-09-22 14:26:40,080 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4085 ImplicationChecksByTransitivity, 1564.8ms TimeCoverageRelationStatistics Valid=4582, Invalid=10180, Unknown=0, NotChecked=0, Total=14762 [2021-09-22 14:26:40,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-09-22 14:26:40,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 110. [2021-09-22 14:26:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.4862385321100917) internal successors, (271), 109 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-09-22 14:26:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 271 transitions. [2021-09-22 14:26:40,082 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 271 transitions. Word has length 47 [2021-09-22 14:26:40,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-09-22 14:26:40,083 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 271 transitions. [2021-09-22 14:26:40,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 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) [2021-09-22 14:26:40,083 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 271 transitions. [2021-09-22 14:26:40,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-09-22 14:26:40,083 INFO L504 BasicCegarLoop]: Found error trace [2021-09-22 14:26:40,083 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2021-09-22 14:26:40,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-09-22 14:26:40,301 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,SelfDestructingSolverStorable47 [2021-09-22 14:26:40,301 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-09-22 14:26:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-09-22 14:26:40,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1548206027, now seen corresponding path program 47 times [2021-09-22 14:26:40,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-09-22 14:26:40,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288526770] [2021-09-22 14:26:40,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-09-22 14:26:40,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-09-22 14:26:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-09-22 14:26:40,314 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-09-22 14:26:40,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-09-22 14:26:40,349 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-09-22 14:26:40,349 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-09-22 14:26:40,350 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-09-22 14:26:40,351 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION [2021-09-22 14:26:40,351 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION [2021-09-22 14:26:40,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-09-22 14:26:40,355 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-09-22 14:26:40,355 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-09-22 14:26:40,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.09 02:26:40 BasicIcfg [2021-09-22 14:26:40,427 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-09-22 14:26:40,427 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-09-22 14:26:40,427 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-09-22 14:26:40,427 INFO L275 PluginConnector]: Witness Printer initialized [2021-09-22 14:26:40,427 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.09 02:25:32" (3/4) ... [2021-09-22 14:26:40,429 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-09-22 14:26:40,510 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-09-22 14:26:40,511 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-09-22 14:26:40,512 INFO L168 Benchmark]: Toolchain (without parser) took 69193.65 ms. Allocated memory was 56.6 MB in the beginning and 343.9 MB in the end (delta: 287.3 MB). Free memory was 34.2 MB in the beginning and 134.9 MB in the end (delta: -100.7 MB). Peak memory consumption was 186.4 MB. Max. memory is 16.1 GB. [2021-09-22 14:26:40,512 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 56.6 MB. Free memory was 38.7 MB in the beginning and 38.7 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-09-22 14:26:40,513 INFO L168 Benchmark]: CACSL2BoogieTranslator took 389.36 ms. Allocated memory is still 56.6 MB. Free memory was 34.0 MB in the beginning and 31.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-09-22 14:26:40,513 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.39 ms. Allocated memory is still 56.6 MB. Free memory was 31.1 MB in the beginning and 29.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-09-22 14:26:40,513 INFO L168 Benchmark]: Boogie Preprocessor took 31.98 ms. Allocated memory is still 56.6 MB. Free memory was 29.4 MB in the beginning and 28.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-09-22 14:26:40,513 INFO L168 Benchmark]: RCFGBuilder took 241.71 ms. Allocated memory was 56.6 MB in the beginning and 77.6 MB in the end (delta: 21.0 MB). Free memory was 27.9 MB in the beginning and 52.6 MB in the end (delta: -24.7 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2021-09-22 14:26:40,514 INFO L168 Benchmark]: TraceAbstraction took 68402.75 ms. Allocated memory was 77.6 MB in the beginning and 343.9 MB in the end (delta: 266.3 MB). Free memory was 52.3 MB in the beginning and 149.5 MB in the end (delta: -97.2 MB). Peak memory consumption was 168.7 MB. Max. memory is 16.1 GB. [2021-09-22 14:26:40,514 INFO L168 Benchmark]: Witness Printer took 83.69 ms. Allocated memory is still 343.9 MB. Free memory was 149.5 MB in the beginning and 134.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-09-22 14:26:40,515 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 56.6 MB. Free memory was 38.7 MB in the beginning and 38.7 MB in the end (delta: 73.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 389.36 ms. Allocated memory is still 56.6 MB. Free memory was 34.0 MB in the beginning and 31.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.39 ms. Allocated memory is still 56.6 MB. Free memory was 31.1 MB in the beginning and 29.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.98 ms. Allocated memory is still 56.6 MB. Free memory was 29.4 MB in the beginning and 28.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 241.71 ms. Allocated memory was 56.6 MB in the beginning and 77.6 MB in the end (delta: 21.0 MB). Free memory was 27.9 MB in the beginning and 52.6 MB in the end (delta: -24.7 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 68402.75 ms. Allocated memory was 77.6 MB in the beginning and 343.9 MB in the end (delta: 266.3 MB). Free memory was 52.3 MB in the beginning and 149.5 MB in the end (delta: -97.2 MB). Peak memory consumption was 168.7 MB. Max. memory is 16.1 GB. * Witness Printer took 83.69 ms. Allocated memory is still 343.9 MB. Free memory was 149.5 MB in the beginning and 134.9 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2014.9ms, 68 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 15 TransitionsAfterwards, 1078 CoEnabledTransitionPairs, 6 FixpointIterations, 18 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 3 ChoiceCompositions, 58 TotalNumberOfCompositions, 1010 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 867, positive: 842, positive conditional: 0, positive unconditional: 842, negative: 25, negative conditional: 0, negative unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 710, positive: 695, positive conditional: 0, positive unconditional: 695, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 710, positive: 695, positive conditional: 0, positive unconditional: 695, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 15, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 15, negative conditional: 0, negative unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 20, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 867, positive: 147, positive conditional: 0, positive unconditional: 147, negative: 10, negative conditional: 0, negative unconditional: 10, unknown: 710, unknown conditional: 0, unknown unconditional: 710] , Statistics on independence cache: Total cache size (in pairs): 16, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3 - 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 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=10] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=26, k=11, k=10] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=27, j=28, k=11, k=11] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=28, k=12, k=11] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=29, j=30, k=12, k=12] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=30, k=12, k=13] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=31, j=32, k=13, k=13] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=32, k=13, k=14] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=33, j=34, k=14, k=14] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=34, k=15, k=14] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=35, j=36, k=15, k=15] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=36, k=16, k=15] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=37, j=38, k=16, k=16] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=38, k=16, k=17] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=39, j=40, k=17, k=17] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=40, k=18, k=17] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=41, j=42, k=18, k=18] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=42, k=19, k=18] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=43, j=44, k=19, k=19] [L696] COND TRUE 1 k < 20 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=44, k=19, k=20] [L704] COND TRUE 2 k < 20 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] [L716] 0 int condI = i >= (2*20 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] [L719] 0 int condJ = j >= (2*20 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=45, j=46, k=20, k=20] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 68246.5ms, OverallIterations: 49, TraceHistogramMax: 20, EmptinessCheckTime: 35.5ms, AutomataDifference: 31738.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 2049.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 871 SDtfs, 7781 SDslu, 3074 SDs, 0 SdLazy, 6410 SolverSat, 7254 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4314.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4018 GetRequests, 1132 SyntacticMatches, 0 SemanticMatches, 2886 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65834 ImplicationChecksByTransitivity, 32885.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=192occurred in iteration=47, InterpolantAutomatonStates: 2045, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 135.5ms AutomataMinimizationTime, 48 MinimizatonAttempts, 1772 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 405.7ms SsaConstructionTime, 1275.1ms SatisfiabilityAnalysisTime, 12857.3ms InterpolantComputationTime, 2550 NumberOfCodeBlocks, 2550 NumberOfCodeBlocksAsserted, 306 NumberOfCheckSat, 2410 ConstructedInterpolants, 0 QuantifiedInterpolants, 8066 SizeOfPredicates, 876 NumberOfNonLiveVariables, 8546 ConjunctsInSsa, 1144 ConjunctsInUnsatCore, 92 InterpolantComputations, 4 PerfectInterpolantSequences, 12/10580 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 RESULT: Ultimate proved your program to be incorrect! [2021-09-22 14:26:40,560 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...