./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/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 a230fcca2a1790e38cbbdd02b860d4cd522e1a51 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-08 14:43:30,348 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-08 14:43:30,352 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-08 14:43:30,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-08 14:43:30,408 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-08 14:43:30,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-08 14:43:30,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-08 14:43:30,420 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-08 14:43:30,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-08 14:43:30,429 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-08 14:43:30,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-08 14:43:30,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-08 14:43:30,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-08 14:43:30,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-08 14:43:30,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-08 14:43:30,450 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-08 14:43:30,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-08 14:43:30,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-08 14:43:30,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-08 14:43:30,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-08 14:43:30,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-08 14:43:30,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-08 14:43:30,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-08 14:43:30,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-08 14:43:30,477 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-08 14:43:30,477 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-08 14:43:30,477 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-08 14:43:30,478 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-08 14:43:30,479 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-08 14:43:30,481 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-08 14:43:30,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-08 14:43:30,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-08 14:43:30,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-08 14:43:30,487 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-08 14:43:30,489 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-08 14:43:30,489 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-08 14:43:30,490 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-08 14:43:30,490 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-08 14:43:30,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-08 14:43:30,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-08 14:43:30,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-08 14:43:30,500 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-08 14:43:30,547 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-08 14:43:30,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-08 14:43:30,548 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-08 14:43:30,549 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-08 14:43:30,551 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-08 14:43:30,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-08 14:43:30,551 INFO L138 SettingsManager]: * Use SBE=true [2021-10-08 14:43:30,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-08 14:43:30,552 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-08 14:43:30,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-08 14:43:30,553 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-08 14:43:30,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-08 14:43:30,553 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-08 14:43:30,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-08 14:43:30,554 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-08 14:43:30,554 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-08 14:43:30,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-08 14:43:30,555 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-08 14:43:30,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-08 14:43:30,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-08 14:43:30,555 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-08 14:43:30,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-08 14:43:30,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 14:43:30,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-08 14:43:30,556 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-08 14:43:30,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-08 14:43:30,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-08 14:43:30,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-08 14:43:30,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-08 14:43:30,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-08 14:43:30,558 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a230fcca2a1790e38cbbdd02b860d4cd522e1a51 [2021-10-08 14:43:31,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-08 14:43:31,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-08 14:43:31,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-08 14:43:31,047 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-08 14:43:31,048 INFO L275 PluginConnector]: CDTParser initialized [2021-10-08 14:43:31,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2021-10-08 14:43:31,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76502f1cb/99b51859960040449feafb9b1a6c5a49/FLAGe0522972e [2021-10-08 14:43:31,744 INFO L306 CDTParser]: Found 1 translation units. [2021-10-08 14:43:31,745 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2021-10-08 14:43:31,757 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76502f1cb/99b51859960040449feafb9b1a6c5a49/FLAGe0522972e [2021-10-08 14:43:32,127 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76502f1cb/99b51859960040449feafb9b1a6c5a49 [2021-10-08 14:43:32,131 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-08 14:43:32,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-08 14:43:32,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-08 14:43:32,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-08 14:43:32,152 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-08 14:43:32,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 02:43:32" (1/1) ... [2021-10-08 14:43:32,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74c6edf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:43:32, skipping insertion in model container [2021-10-08 14:43:32,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.10 02:43:32" (1/1) ... [2021-10-08 14:43:32,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-08 14:43:32,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-08 14:43:32,501 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5146,5159] [2021-10-08 14:43:32,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 14:43:32,519 INFO L203 MainTranslator]: Completed pre-run [2021-10-08 14:43:32,553 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c[5146,5159] [2021-10-08 14:43:32,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-08 14:43:32,575 INFO L208 MainTranslator]: Completed translation [2021-10-08 14:43:32,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:43:32 WrapperNode [2021-10-08 14:43:32,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-08 14:43:32,577 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-08 14:43:32,577 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-08 14:43:32,577 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-08 14:43:32,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:43:32" (1/1) ... [2021-10-08 14:43:32,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:43:32" (1/1) ... [2021-10-08 14:43:32,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-08 14:43:32,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-08 14:43:32,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-08 14:43:32,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-08 14:43:32,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:43:32" (1/1) ... [2021-10-08 14:43:32,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:43:32" (1/1) ... [2021-10-08 14:43:32,678 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:43:32" (1/1) ... [2021-10-08 14:43:32,679 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:43:32" (1/1) ... [2021-10-08 14:43:32,706 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:43:32" (1/1) ... [2021-10-08 14:43:32,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:43:32" (1/1) ... [2021-10-08 14:43:32,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:43:32" (1/1) ... [2021-10-08 14:43:32,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-08 14:43:32,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-08 14:43:32,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-08 14:43:32,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-08 14:43:32,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:43:32" (1/1) ... [2021-10-08 14:43:32,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-08 14:43:32,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:43:32,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-08 14:43:32,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-08 14:43:32,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-08 14:43:32,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-08 14:43:32,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-08 14:43:32,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-08 14:43:32,851 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-08 14:43:32,851 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-08 14:43:32,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-08 14:43:32,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-08 14:43:32,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-08 14:43:32,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-08 14:43:32,852 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-08 14:43:32,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-08 14:43:32,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-08 14:43:32,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-08 14:43:32,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-08 14:43:32,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-08 14:43:32,856 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-08 14:43:34,019 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-08 14:43:34,020 INFO L299 CfgBuilder]: Removed 54 assume(true) statements. [2021-10-08 14:43:34,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 02:43:34 BoogieIcfgContainer [2021-10-08 14:43:34,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-08 14:43:34,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-08 14:43:34,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-08 14:43:34,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-08 14:43:34,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.10 02:43:32" (1/3) ... [2021-10-08 14:43:34,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b15314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 02:43:34, skipping insertion in model container [2021-10-08 14:43:34,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.10 02:43:32" (2/3) ... [2021-10-08 14:43:34,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69b15314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.10 02:43:34, skipping insertion in model container [2021-10-08 14:43:34,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 02:43:34" (3/3) ... [2021-10-08 14:43:34,032 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2021-10-08 14:43:34,038 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-08 14:43:34,038 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-08 14:43:34,038 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-08 14:43:34,039 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-08 14:43:34,081 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,081 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,082 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,082 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,082 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,082 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,083 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,083 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,083 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,083 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,084 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,084 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,085 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,085 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,086 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,086 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,086 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,087 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,087 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,087 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,088 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,089 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,089 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,089 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,090 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,091 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,091 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,091 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,092 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,092 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,092 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,092 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,093 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,093 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,093 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,093 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,094 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,094 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,095 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,095 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,095 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,095 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,096 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,096 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,098 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,099 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,099 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,099 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,099 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,100 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,100 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,100 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,101 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,101 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,101 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,102 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,102 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,102 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,102 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,103 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,103 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,104 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,104 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,104 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,105 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,106 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,106 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,106 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,107 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,108 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,108 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,108 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,112 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,112 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,113 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,113 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,113 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,113 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,114 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,114 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,114 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,115 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,115 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,115 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,116 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,116 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,117 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,120 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,121 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,121 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,121 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,122 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,123 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,123 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,124 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,124 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,132 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,132 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,133 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,133 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,139 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,140 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,140 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~nondet12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,145 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,145 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,145 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,146 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,146 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,146 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~mem15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,149 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~nondet17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,149 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,149 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,149 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem20| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,150 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,150 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,150 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,150 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,151 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork1_#t~post21| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,152 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,153 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,153 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,153 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,154 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,154 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,154 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,154 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,155 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,155 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~nondet3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,155 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,155 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,155 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork2_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-08 14:43:34,164 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-08 14:43:34,221 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-08 14:43:34,232 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 [2021-10-08 14:43:34,232 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-08 14:43:34,258 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-08 14:43:34,268 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 249 transitions, 522 flow [2021-10-08 14:43:34,271 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 249 transitions, 522 flow [2021-10-08 14:43:34,273 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 232 places, 249 transitions, 522 flow [2021-10-08 14:43:34,397 INFO L129 PetriNetUnfolder]: 27/246 cut-off events. [2021-10-08 14:43:34,398 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-08 14:43:34,407 INFO L84 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 246 events. 27/246 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 162 event pairs, 0 based on Foata normal form. 0/218 useless extension candidates. Maximal degree in co-relation 208. Up to 6 conditions per place. [2021-10-08 14:43:34,414 INFO L116 LiptonReduction]: Number of co-enabled transitions 2442 [2021-10-08 14:43:46,186 INFO L131 LiptonReduction]: Checked pairs total: 2302 [2021-10-08 14:43:46,186 INFO L133 LiptonReduction]: Total number of compositions: 265 [2021-10-08 14:43:46,195 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 29 transitions, 82 flow [2021-10-08 14:43:46,210 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:46,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:46,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-08 14:43:46,219 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:46,220 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:46,220 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:46,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:46,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1145847820, now seen corresponding path program 1 times [2021-10-08 14:43:46,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:46,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098651526] [2021-10-08 14:43:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:46,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:43:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:43:46,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:43:46,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098651526] [2021-10-08 14:43:46,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098651526] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 14:43:46,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 14:43:46,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-08 14:43:46,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453912686] [2021-10-08 14:43:46,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 14:43:46,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:43:46,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 14:43:46,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 14:43:46,741 INFO L87 Difference]: Start difference. First operand has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 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 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:46,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:43:46,777 INFO L93 Difference]: Finished difference Result 88 states and 251 transitions. [2021-10-08 14:43:46,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 14:43:46,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-08 14:43:46,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:43:46,790 INFO L225 Difference]: With dead ends: 88 [2021-10-08 14:43:46,790 INFO L226 Difference]: Without dead ends: 81 [2021-10-08 14:43:46,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 14:43:46,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-08 14:43:46,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-08 14:43:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.9125) internal successors, (233), 80 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 233 transitions. [2021-10-08 14:43:46,834 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 233 transitions. Word has length 19 [2021-10-08 14:43:46,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:43:46,835 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 233 transitions. [2021-10-08 14:43:46,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:46,835 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 233 transitions. [2021-10-08 14:43:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-08 14:43:46,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:46,837 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:46,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-08 14:43:46,838 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:46,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:46,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1404070991, now seen corresponding path program 1 times [2021-10-08 14:43:46,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:46,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856280357] [2021-10-08 14:43:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:46,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:43:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:43:47,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:43:47,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856280357] [2021-10-08 14:43:47,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856280357] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 14:43:47,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 14:43:47,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-08 14:43:47,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690837851] [2021-10-08 14:43:47,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-08 14:43:47,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:43:47,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-08 14:43:47,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 14:43:47,092 INFO L87 Difference]: Start difference. First operand 81 states and 233 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 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) [2021-10-08 14:43:47,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:43:47,109 INFO L93 Difference]: Finished difference Result 77 states and 211 transitions. [2021-10-08 14:43:47,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-08 14:43:47,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-08 14:43:47,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:43:47,112 INFO L225 Difference]: With dead ends: 77 [2021-10-08 14:43:47,112 INFO L226 Difference]: Without dead ends: 75 [2021-10-08 14:43:47,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-08 14:43:47,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-08 14:43:47,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-08 14:43:47,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.7837837837837838) internal successors, (206), 74 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:47,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 206 transitions. [2021-10-08 14:43:47,125 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 206 transitions. Word has length 20 [2021-10-08 14:43:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:43:47,125 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 206 transitions. [2021-10-08 14:43:47,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 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) [2021-10-08 14:43:47,125 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 206 transitions. [2021-10-08 14:43:47,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-08 14:43:47,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:47,127 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:47,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-08 14:43:47,128 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:47,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:47,128 INFO L82 PathProgramCache]: Analyzing trace with hash -155149306, now seen corresponding path program 1 times [2021-10-08 14:43:47,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:47,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244527376] [2021-10-08 14:43:47,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:47,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:43:47,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:47,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:43:47,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:43:47,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244527376] [2021-10-08 14:43:47,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244527376] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 14:43:47,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 14:43:47,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-08 14:43:47,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925805366] [2021-10-08 14:43:47,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 14:43:47,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:43:47,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 14:43:47,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 14:43:47,319 INFO L87 Difference]: Start difference. First operand 75 states and 206 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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) [2021-10-08 14:43:47,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:43:47,343 INFO L93 Difference]: Finished difference Result 127 states and 334 transitions. [2021-10-08 14:43:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 14:43:47,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-08 14:43:47,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:43:47,346 INFO L225 Difference]: With dead ends: 127 [2021-10-08 14:43:47,346 INFO L226 Difference]: Without dead ends: 121 [2021-10-08 14:43:47,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 14:43:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-08 14:43:47,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 73. [2021-10-08 14:43:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.6944444444444446) internal successors, (194), 72 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 194 transitions. [2021-10-08 14:43:47,358 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 194 transitions. Word has length 20 [2021-10-08 14:43:47,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:43:47,359 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 194 transitions. [2021-10-08 14:43:47,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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) [2021-10-08 14:43:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 194 transitions. [2021-10-08 14:43:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-08 14:43:47,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:47,361 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:47,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-08 14:43:47,361 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:47,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:47,362 INFO L82 PathProgramCache]: Analyzing trace with hash 747917546, now seen corresponding path program 1 times [2021-10-08 14:43:47,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:47,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046167211] [2021-10-08 14:43:47,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:47,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:43:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:43:47,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:43:47,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046167211] [2021-10-08 14:43:47,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046167211] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 14:43:47,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 14:43:47,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-08 14:43:47,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776686976] [2021-10-08 14:43:47,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 14:43:47,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:43:47,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 14:43:47,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 14:43:47,456 INFO L87 Difference]: Start difference. First operand 73 states and 194 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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) [2021-10-08 14:43:47,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:43:47,490 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2021-10-08 14:43:47,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 14:43:47,491 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-08 14:43:47,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:43:47,492 INFO L225 Difference]: With dead ends: 103 [2021-10-08 14:43:47,492 INFO L226 Difference]: Without dead ends: 74 [2021-10-08 14:43:47,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-08 14:43:47,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-08 14:43:47,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-08 14:43:47,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.671232876712329) internal successors, (195), 73 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:47,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 195 transitions. [2021-10-08 14:43:47,502 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 195 transitions. Word has length 20 [2021-10-08 14:43:47,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:43:47,502 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 195 transitions. [2021-10-08 14:43:47,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 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) [2021-10-08 14:43:47,503 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 195 transitions. [2021-10-08 14:43:47,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-08 14:43:47,504 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:47,504 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:47,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-08 14:43:47,505 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:47,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:47,505 INFO L82 PathProgramCache]: Analyzing trace with hash 944252316, now seen corresponding path program 1 times [2021-10-08 14:43:47,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:47,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550141398] [2021-10-08 14:43:47,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:47,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:43:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:43:47,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:43:47,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550141398] [2021-10-08 14:43:47,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550141398] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:47,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91386550] [2021-10-08 14:43:47,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:47,617 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:43:47,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:43:47,623 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:43:47,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-08 14:43:47,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:47,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-08 14:43:47,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:43:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:43:48,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91386550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:48,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:43:48,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2021-10-08 14:43:48,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297381241] [2021-10-08 14:43:48,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-08 14:43:48,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:43:48,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-08 14:43:48,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 14:43:48,147 INFO L87 Difference]: Start difference. First operand 74 states and 195 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-10-08 14:43:48,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:43:48,173 INFO L93 Difference]: Finished difference Result 103 states and 272 transitions. [2021-10-08 14:43:48,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 14:43:48,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-08 14:43:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:43:48,177 INFO L225 Difference]: With dead ends: 103 [2021-10-08 14:43:48,181 INFO L226 Difference]: Without dead ends: 92 [2021-10-08 14:43:48,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-08 14:43:48,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-08 14:43:48,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-08 14:43:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.6923076923076925) internal successors, (245), 91 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:48,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 245 transitions. [2021-10-08 14:43:48,203 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 245 transitions. Word has length 21 [2021-10-08 14:43:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:43:48,205 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 245 transitions. [2021-10-08 14:43:48,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-10-08 14:43:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 245 transitions. [2021-10-08 14:43:48,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-08 14:43:48,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:48,210 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:48,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-08 14:43:48,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:43:48,412 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:48,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:48,413 INFO L82 PathProgramCache]: Analyzing trace with hash -781952542, now seen corresponding path program 2 times [2021-10-08 14:43:48,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:48,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529549781] [2021-10-08 14:43:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:48,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:43:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:43:48,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:43:48,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529549781] [2021-10-08 14:43:48,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529549781] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:48,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069799769] [2021-10-08 14:43:48,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 14:43:48,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:43:48,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:43:48,536 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:43:48,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-08 14:43:48,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 14:43:48,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:43:48,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 14:43:48,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:43:49,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:43:49,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069799769] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:49,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:43:49,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-10-08 14:43:49,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624803289] [2021-10-08 14:43:49,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 14:43:49,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:43:49,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 14:43:49,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-08 14:43:49,148 INFO L87 Difference]: Start difference. First operand 92 states and 245 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-10-08 14:43:49,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:43:49,314 INFO L93 Difference]: Finished difference Result 215 states and 499 transitions. [2021-10-08 14:43:49,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 14:43:49,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 22 [2021-10-08 14:43:49,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:43:49,317 INFO L225 Difference]: With dead ends: 215 [2021-10-08 14:43:49,317 INFO L226 Difference]: Without dead ends: 147 [2021-10-08 14:43:49,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-08 14:43:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-08 14:43:49,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 89. [2021-10-08 14:43:49,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.6136363636363638) internal successors, (230), 88 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:49,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 230 transitions. [2021-10-08 14:43:49,326 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 230 transitions. Word has length 22 [2021-10-08 14:43:49,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:43:49,327 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 230 transitions. [2021-10-08 14:43:49,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2021-10-08 14:43:49,327 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 230 transitions. [2021-10-08 14:43:49,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-08 14:43:49,329 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:49,329 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:49,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-08 14:43:49,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-08 14:43:49,543 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:49,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:49,544 INFO L82 PathProgramCache]: Analyzing trace with hash -692057369, now seen corresponding path program 1 times [2021-10-08 14:43:49,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:49,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116934229] [2021-10-08 14:43:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:49,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:43:49,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:49,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:43:49,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:43:49,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116934229] [2021-10-08 14:43:49,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116934229] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:49,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623915449] [2021-10-08 14:43:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:49,933 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:43:49,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:43:49,934 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:43:49,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-08 14:43:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:50,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-08 14:43:50,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:43:50,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:43:50,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 363 treesize of output 347 [2021-10-08 14:43:50,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-08 14:43:50,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-08 14:43:50,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-08 14:43:50,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-08 14:43:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:43:50,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623915449] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:50,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:43:50,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-10-08 14:43:50,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706562871] [2021-10-08 14:43:50,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 14:43:50,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:43:50,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 14:43:50,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-10-08 14:43:50,832 INFO L87 Difference]: Start difference. First operand 89 states and 230 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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) [2021-10-08 14:43:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:43:51,125 INFO L93 Difference]: Finished difference Result 171 states and 439 transitions. [2021-10-08 14:43:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 14:43:51,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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 22 [2021-10-08 14:43:51,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:43:51,127 INFO L225 Difference]: With dead ends: 171 [2021-10-08 14:43:51,127 INFO L226 Difference]: Without dead ends: 158 [2021-10-08 14:43:51,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 373.3ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-10-08 14:43:51,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-08 14:43:51,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2021-10-08 14:43:51,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.588235294117647) internal successors, (396), 153 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:51,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 396 transitions. [2021-10-08 14:43:51,138 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 396 transitions. Word has length 22 [2021-10-08 14:43:51,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:43:51,138 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 396 transitions. [2021-10-08 14:43:51,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 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) [2021-10-08 14:43:51,139 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 396 transitions. [2021-10-08 14:43:51,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-08 14:43:51,143 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:51,144 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:51,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-08 14:43:51,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:43:51,360 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1708294212, now seen corresponding path program 2 times [2021-10-08 14:43:51,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:51,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061851629] [2021-10-08 14:43:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:51,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:43:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 14:43:51,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:43:51,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061851629] [2021-10-08 14:43:51,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061851629] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:51,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911242729] [2021-10-08 14:43:51,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 14:43:51,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:43:51,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:43:51,464 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:43:51,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-08 14:43:51,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 14:43:51,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:43:51,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 14:43:51,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:43:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 14:43:51,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911242729] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:51,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:43:51,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-08 14:43:51,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591007584] [2021-10-08 14:43:51,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-08 14:43:51,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:43:51,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-08 14:43:51,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-08 14:43:51,952 INFO L87 Difference]: Start difference. First operand 154 states and 396 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 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) [2021-10-08 14:43:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:43:52,033 INFO L93 Difference]: Finished difference Result 338 states and 848 transitions. [2021-10-08 14:43:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 14:43:52,034 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 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 23 [2021-10-08 14:43:52,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:43:52,037 INFO L225 Difference]: With dead ends: 338 [2021-10-08 14:43:52,038 INFO L226 Difference]: Without dead ends: 326 [2021-10-08 14:43:52,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-08 14:43:52,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-10-08 14:43:52,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 238. [2021-10-08 14:43:52,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.459915611814346) internal successors, (583), 237 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:52,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 583 transitions. [2021-10-08 14:43:52,059 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 583 transitions. Word has length 23 [2021-10-08 14:43:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:43:52,060 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 583 transitions. [2021-10-08 14:43:52,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 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) [2021-10-08 14:43:52,060 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 583 transitions. [2021-10-08 14:43:52,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-08 14:43:52,063 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:52,063 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:52,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-08 14:43:52,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:43:52,278 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:52,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:52,279 INFO L82 PathProgramCache]: Analyzing trace with hash 769214971, now seen corresponding path program 1 times [2021-10-08 14:43:52,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:52,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215567209] [2021-10-08 14:43:52,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:52,280 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:43:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 14:43:52,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:43:52,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215567209] [2021-10-08 14:43:52,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215567209] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 14:43:52,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 14:43:52,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-08 14:43:52,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232086053] [2021-10-08 14:43:52,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-08 14:43:52,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:43:52,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-08 14:43:52,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-08 14:43:52,419 INFO L87 Difference]: Start difference. First operand 238 states and 583 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:43:52,459 INFO L93 Difference]: Finished difference Result 292 states and 683 transitions. [2021-10-08 14:43:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 14:43:52,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-08 14:43:52,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:43:52,462 INFO L225 Difference]: With dead ends: 292 [2021-10-08 14:43:52,462 INFO L226 Difference]: Without dead ends: 269 [2021-10-08 14:43:52,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-08 14:43:52,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-10-08 14:43:52,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 239. [2021-10-08 14:43:52,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.46218487394958) internal successors, (586), 238 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:52,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 586 transitions. [2021-10-08 14:43:52,473 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 586 transitions. Word has length 23 [2021-10-08 14:43:52,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:43:52,473 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 586 transitions. [2021-10-08 14:43:52,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:52,473 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 586 transitions. [2021-10-08 14:43:52,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-08 14:43:52,474 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:52,475 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:52,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-08 14:43:52,475 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:52,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:52,475 INFO L82 PathProgramCache]: Analyzing trace with hash -992904423, now seen corresponding path program 3 times [2021-10-08 14:43:52,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:52,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090972300] [2021-10-08 14:43:52,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:52,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:43:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:43:53,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:43:53,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090972300] [2021-10-08 14:43:53,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090972300] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:53,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244796077] [2021-10-08 14:43:53,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 14:43:53,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:43:53,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:43:53,287 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:43:53,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-08 14:43:53,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-08 14:43:53,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:43:53,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-08 14:43:53,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:43:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:43:53,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244796077] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:53,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:43:53,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 10 [2021-10-08 14:43:53,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873672251] [2021-10-08 14:43:53,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-08 14:43:53,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:43:53,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-08 14:43:53,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-10-08 14:43:53,807 INFO L87 Difference]: Start difference. First operand 239 states and 586 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-10-08 14:43:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:43:54,334 INFO L93 Difference]: Finished difference Result 377 states and 919 transitions. [2021-10-08 14:43:54,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-08 14:43:54,334 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 23 [2021-10-08 14:43:54,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:43:54,337 INFO L225 Difference]: With dead ends: 377 [2021-10-08 14:43:54,337 INFO L226 Difference]: Without dead ends: 310 [2021-10-08 14:43:54,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 538.7ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-10-08 14:43:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-10-08 14:43:54,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 160. [2021-10-08 14:43:54,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.6729559748427674) internal successors, (425), 159 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 425 transitions. [2021-10-08 14:43:54,345 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 425 transitions. Word has length 23 [2021-10-08 14:43:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:43:54,346 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 425 transitions. [2021-10-08 14:43:54,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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) [2021-10-08 14:43:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 425 transitions. [2021-10-08 14:43:54,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-08 14:43:54,347 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:54,347 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:54,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-08 14:43:54,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:43:54,562 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:54,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:54,563 INFO L82 PathProgramCache]: Analyzing trace with hash -584019001, now seen corresponding path program 1 times [2021-10-08 14:43:54,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:54,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639875046] [2021-10-08 14:43:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:54,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:43:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:43:54,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:43:54,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639875046] [2021-10-08 14:43:54,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639875046] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:54,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249768572] [2021-10-08 14:43:54,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:54,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:43:54,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:43:54,835 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:43:54,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-08 14:43:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:54,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 14:43:55,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:43:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 14:43:55,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249768572] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:55,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:43:55,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-10-08 14:43:55,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385220560] [2021-10-08 14:43:55,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-08 14:43:55,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:43:55,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-08 14:43:55,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-10-08 14:43:55,753 INFO L87 Difference]: Start difference. First operand 160 states and 425 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-10-08 14:43:56,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:43:56,128 INFO L93 Difference]: Finished difference Result 286 states and 698 transitions. [2021-10-08 14:43:56,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-08 14:43:56,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 24 [2021-10-08 14:43:56,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:43:56,131 INFO L225 Difference]: With dead ends: 286 [2021-10-08 14:43:56,131 INFO L226 Difference]: Without dead ends: 228 [2021-10-08 14:43:56,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 336.1ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-10-08 14:43:56,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-10-08 14:43:56,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 133. [2021-10-08 14:43:56,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.6893939393939394) internal successors, (355), 132 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 355 transitions. [2021-10-08 14:43:56,138 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 355 transitions. Word has length 24 [2021-10-08 14:43:56,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:43:56,139 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 355 transitions. [2021-10-08 14:43:56,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-10-08 14:43:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 355 transitions. [2021-10-08 14:43:56,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-08 14:43:56,140 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:56,140 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:56,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-08 14:43:56,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-08 14:43:56,355 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:56,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:56,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1995511470, now seen corresponding path program 1 times [2021-10-08 14:43:56,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:56,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102044049] [2021-10-08 14:43:56,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:56,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:43:56,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:43:56,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:43:56,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102044049] [2021-10-08 14:43:56,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102044049] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:56,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172570013] [2021-10-08 14:43:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:56,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:43:56,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:43:56,789 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:43:56,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-08 14:43:57,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:57,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-08 14:43:57,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:43:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:43:57,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172570013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:57,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:43:57,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2021-10-08 14:43:57,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236249048] [2021-10-08 14:43:57,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-08 14:43:57,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:43:57,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-08 14:43:57,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-10-08 14:43:57,482 INFO L87 Difference]: Start difference. First operand 133 states and 355 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:57,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:43:57,842 INFO L93 Difference]: Finished difference Result 226 states and 602 transitions. [2021-10-08 14:43:57,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 14:43:57,842 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-08 14:43:57,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:43:57,844 INFO L225 Difference]: With dead ends: 226 [2021-10-08 14:43:57,845 INFO L226 Difference]: Without dead ends: 213 [2021-10-08 14:43:57,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 379.5ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-10-08 14:43:57,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-10-08 14:43:57,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 183. [2021-10-08 14:43:57,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.71978021978022) internal successors, (495), 182 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 495 transitions. [2021-10-08 14:43:57,853 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 495 transitions. Word has length 24 [2021-10-08 14:43:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:43:57,853 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 495 transitions. [2021-10-08 14:43:57,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:57,853 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 495 transitions. [2021-10-08 14:43:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-08 14:43:57,854 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:57,854 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:57,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-08 14:43:58,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:43:58,056 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:58,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:58,057 INFO L82 PathProgramCache]: Analyzing trace with hash 481997713, now seen corresponding path program 1 times [2021-10-08 14:43:58,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:58,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633488765] [2021-10-08 14:43:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:58,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:43:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 14:43:58,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:43:58,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633488765] [2021-10-08 14:43:58,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633488765] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-08 14:43:58,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-08 14:43:58,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-08 14:43:58,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284714683] [2021-10-08 14:43:58,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-08 14:43:58,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:43:58,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-08 14:43:58,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-08 14:43:58,229 INFO L87 Difference]: Start difference. First operand 183 states and 495 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2021-10-08 14:43:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:43:58,245 INFO L93 Difference]: Finished difference Result 201 states and 514 transitions. [2021-10-08 14:43:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-08 14:43:58,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-08 14:43:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:43:58,252 INFO L225 Difference]: With dead ends: 201 [2021-10-08 14:43:58,252 INFO L226 Difference]: Without dead ends: 189 [2021-10-08 14:43:58,253 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-08 14:43:58,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-10-08 14:43:58,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 181. [2021-10-08 14:43:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.6055555555555556) internal successors, (469), 180 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 469 transitions. [2021-10-08 14:43:58,260 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 469 transitions. Word has length 24 [2021-10-08 14:43:58,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:43:58,261 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 469 transitions. [2021-10-08 14:43:58,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2021-10-08 14:43:58,261 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 469 transitions. [2021-10-08 14:43:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-08 14:43:58,262 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:58,262 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:58,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-10-08 14:43:58,263 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:58,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:58,263 INFO L82 PathProgramCache]: Analyzing trace with hash 834301617, now seen corresponding path program 2 times [2021-10-08 14:43:58,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:58,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728233251] [2021-10-08 14:43:58,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:58,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:43:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:43:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:43:58,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:43:58,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728233251] [2021-10-08 14:43:58,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728233251] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:58,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993042306] [2021-10-08 14:43:58,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 14:43:58,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:43:58,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:43:58,524 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:43:58,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-08 14:43:58,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 14:43:58,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:43:58,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 14:43:58,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:43:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 14:43:59,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993042306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:43:59,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:43:59,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-10-08 14:43:59,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361091451] [2021-10-08 14:43:59,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-08 14:43:59,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:43:59,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-08 14:43:59,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-10-08 14:43:59,341 INFO L87 Difference]: Start difference. First operand 181 states and 469 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-10-08 14:43:59,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:43:59,670 INFO L93 Difference]: Finished difference Result 305 states and 749 transitions. [2021-10-08 14:43:59,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-08 14:43:59,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 25 [2021-10-08 14:43:59,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:43:59,674 INFO L225 Difference]: With dead ends: 305 [2021-10-08 14:43:59,674 INFO L226 Difference]: Without dead ends: 244 [2021-10-08 14:43:59,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 330.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-10-08 14:43:59,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-10-08 14:43:59,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2021-10-08 14:43:59,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.4539877300613497) internal successors, (400), 163 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:43:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 400 transitions. [2021-10-08 14:43:59,682 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 400 transitions. Word has length 25 [2021-10-08 14:43:59,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:43:59,682 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 400 transitions. [2021-10-08 14:43:59,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2021-10-08 14:43:59,683 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 400 transitions. [2021-10-08 14:43:59,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-08 14:43:59,683 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:43:59,684 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:43:59,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-08 14:43:59,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-08 14:43:59,899 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:43:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:43:59,900 INFO L82 PathProgramCache]: Analyzing trace with hash -670334634, now seen corresponding path program 2 times [2021-10-08 14:43:59,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:43:59,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841698064] [2021-10-08 14:43:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:43:59,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 14:44:00,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:00,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841698064] [2021-10-08 14:44:00,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841698064] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:00,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580090226] [2021-10-08 14:44:00,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 14:44:00,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:00,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:00,344 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:00,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-08 14:44:00,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 14:44:00,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:44:00,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-08 14:44:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:00,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-08 14:44:00,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-08 14:44:00,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-08 14:44:01,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-08 14:44:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 14:44:01,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580090226] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:01,531 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:01,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2021-10-08 14:44:01,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434653573] [2021-10-08 14:44:01,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-08 14:44:01,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:01,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-08 14:44:01,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-10-08 14:44:01,534 INFO L87 Difference]: Start difference. First operand 164 states and 400 transitions. Second operand has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 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) [2021-10-08 14:44:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:02,405 INFO L93 Difference]: Finished difference Result 345 states and 871 transitions. [2021-10-08 14:44:02,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-08 14:44:02,406 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 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 25 [2021-10-08 14:44:02,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:02,408 INFO L225 Difference]: With dead ends: 345 [2021-10-08 14:44:02,408 INFO L226 Difference]: Without dead ends: 328 [2021-10-08 14:44:02,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 860.7ms TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2021-10-08 14:44:02,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-10-08 14:44:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 272. [2021-10-08 14:44:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.5719557195571956) internal successors, (697), 271 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:02,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 697 transitions. [2021-10-08 14:44:02,419 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 697 transitions. Word has length 25 [2021-10-08 14:44:02,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:02,419 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 697 transitions. [2021-10-08 14:44:02,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 18 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) [2021-10-08 14:44:02,420 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 697 transitions. [2021-10-08 14:44:02,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-08 14:44:02,421 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:02,421 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:02,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:02,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:02,636 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:02,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:02,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1808212628, now seen corresponding path program 3 times [2021-10-08 14:44:02,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:02,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134475193] [2021-10-08 14:44:02,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:02,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:44:03,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:03,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134475193] [2021-10-08 14:44:03,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134475193] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:03,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801700849] [2021-10-08 14:44:03,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 14:44:03,386 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:03,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:03,387 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:03,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-08 14:44:03,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-08 14:44:03,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:44:03,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-08 14:44:03,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 14:44:04,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801700849] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:04,229 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:04,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2021-10-08 14:44:04,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386137863] [2021-10-08 14:44:04,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-08 14:44:04,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:04,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-08 14:44:04,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-10-08 14:44:04,231 INFO L87 Difference]: Start difference. First operand 272 states and 697 transitions. Second operand has 17 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:04,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:04,935 INFO L93 Difference]: Finished difference Result 475 states and 1228 transitions. [2021-10-08 14:44:04,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-08 14:44:04,937 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-08 14:44:04,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:04,944 INFO L225 Difference]: With dead ends: 475 [2021-10-08 14:44:04,944 INFO L226 Difference]: Without dead ends: 458 [2021-10-08 14:44:04,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 695.7ms TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-10-08 14:44:04,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-10-08 14:44:04,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 227. [2021-10-08 14:44:04,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.774336283185841) internal successors, (627), 226 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 627 transitions. [2021-10-08 14:44:04,955 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 627 transitions. Word has length 26 [2021-10-08 14:44:04,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:04,956 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 627 transitions. [2021-10-08 14:44:04,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 627 transitions. [2021-10-08 14:44:04,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-08 14:44:04,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:04,957 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:04,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:05,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-08 14:44:05,171 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:05,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:05,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1700857572, now seen corresponding path program 4 times [2021-10-08 14:44:05,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:05,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361875152] [2021-10-08 14:44:05,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:05,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 14:44:05,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:05,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361875152] [2021-10-08 14:44:05,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361875152] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:05,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890091068] [2021-10-08 14:44:05,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 14:44:05,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:05,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:05,307 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:05,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-08 14:44:05,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 14:44:05,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:44:05,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-08 14:44:05,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:06,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 14:44:06,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890091068] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:06,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:06,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-08 14:44:06,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750765493] [2021-10-08 14:44:06,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-08 14:44:06,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:06,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-08 14:44:06,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-08 14:44:06,036 INFO L87 Difference]: Start difference. First operand 227 states and 627 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:06,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:06,188 INFO L93 Difference]: Finished difference Result 426 states and 1158 transitions. [2021-10-08 14:44:06,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-08 14:44:06,189 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-08 14:44:06,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:06,193 INFO L225 Difference]: With dead ends: 426 [2021-10-08 14:44:06,193 INFO L226 Difference]: Without dead ends: 385 [2021-10-08 14:44:06,193 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-08 14:44:06,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-10-08 14:44:06,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 283. [2021-10-08 14:44:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.9645390070921986) internal successors, (836), 282 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:06,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 836 transitions. [2021-10-08 14:44:06,208 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 836 transitions. Word has length 26 [2021-10-08 14:44:06,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:06,209 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 836 transitions. [2021-10-08 14:44:06,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:06,209 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 836 transitions. [2021-10-08 14:44:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-08 14:44:06,210 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:06,211 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:06,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:06,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:06,426 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:06,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:06,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1128128910, now seen corresponding path program 1 times [2021-10-08 14:44:06,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:06,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488468030] [2021-10-08 14:44:06,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:06,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:06,596 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-08 14:44:06,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:06,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488468030] [2021-10-08 14:44:06,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488468030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:06,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906227977] [2021-10-08 14:44:06,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:06,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:06,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:06,600 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:06,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-08 14:44:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:06,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 14:44:06,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-08 14:44:07,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906227977] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:07,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:07,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-08 14:44:07,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100980795] [2021-10-08 14:44:07,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-08 14:44:07,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:07,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-08 14:44:07,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-08 14:44:07,909 INFO L87 Difference]: Start difference. First operand 283 states and 836 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:08,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:08,015 INFO L93 Difference]: Finished difference Result 293 states and 737 transitions. [2021-10-08 14:44:08,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-08 14:44:08,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-08 14:44:08,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:08,017 INFO L225 Difference]: With dead ends: 293 [2021-10-08 14:44:08,018 INFO L226 Difference]: Without dead ends: 259 [2021-10-08 14:44:08,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 179.4ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-10-08 14:44:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-10-08 14:44:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 161. [2021-10-08 14:44:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.5125) internal successors, (402), 160 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 402 transitions. [2021-10-08 14:44:08,025 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 402 transitions. Word has length 27 [2021-10-08 14:44:08,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:08,026 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 402 transitions. [2021-10-08 14:44:08,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:08,026 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 402 transitions. [2021-10-08 14:44:08,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-08 14:44:08,027 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:08,027 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:08,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:08,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-08 14:44:08,241 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:08,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:08,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1238909075, now seen corresponding path program 1 times [2021-10-08 14:44:08,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:08,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38530814] [2021-10-08 14:44:08,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:08,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:08,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:08,473 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 14:44:08,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:08,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38530814] [2021-10-08 14:44:08,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38530814] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:08,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48791015] [2021-10-08 14:44:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:08,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:08,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:08,477 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:08,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-08 14:44:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:08,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-08 14:44:08,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 14:44:09,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48791015] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:09,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:09,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-10-08 14:44:09,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484431546] [2021-10-08 14:44:09,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-08 14:44:09,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:09,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-08 14:44:09,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-08 14:44:09,926 INFO L87 Difference]: Start difference. First operand 161 states and 402 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-10-08 14:44:10,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:10,338 INFO L93 Difference]: Finished difference Result 145 states and 323 transitions. [2021-10-08 14:44:10,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-08 14:44:10,338 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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 27 [2021-10-08 14:44:10,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:10,339 INFO L225 Difference]: With dead ends: 145 [2021-10-08 14:44:10,339 INFO L226 Difference]: Without dead ends: 90 [2021-10-08 14:44:10,340 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-10-08 14:44:10,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-08 14:44:10,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-10-08 14:44:10,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.561797752808989) internal successors, (228), 89 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 228 transitions. [2021-10-08 14:44:10,343 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 228 transitions. Word has length 27 [2021-10-08 14:44:10,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:10,344 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 228 transitions. [2021-10-08 14:44:10,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 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) [2021-10-08 14:44:10,344 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 228 transitions. [2021-10-08 14:44:10,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-08 14:44:10,345 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:10,345 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:10,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:10,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:10,559 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:10,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:10,560 INFO L82 PathProgramCache]: Analyzing trace with hash 268111382, now seen corresponding path program 5 times [2021-10-08 14:44:10,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:10,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338358263] [2021-10-08 14:44:10,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:10,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:10,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:44:11,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:11,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338358263] [2021-10-08 14:44:11,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338358263] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:11,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116938695] [2021-10-08 14:44:11,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 14:44:11,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:11,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:11,313 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:11,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-08 14:44:11,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-08 14:44:11,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:44:11,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-08 14:44:11,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 14:44:12,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116938695] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:12,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:12,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 20 [2021-10-08 14:44:12,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841282249] [2021-10-08 14:44:12,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-08 14:44:12,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:12,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-08 14:44:12,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-10-08 14:44:12,664 INFO L87 Difference]: Start difference. First operand 90 states and 228 transitions. Second operand has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:13,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:13,646 INFO L93 Difference]: Finished difference Result 190 states and 438 transitions. [2021-10-08 14:44:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-08 14:44:13,647 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-08 14:44:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:13,652 INFO L225 Difference]: With dead ends: 190 [2021-10-08 14:44:13,652 INFO L226 Difference]: Without dead ends: 177 [2021-10-08 14:44:13,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1227.1ms TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2021-10-08 14:44:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-10-08 14:44:13,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2021-10-08 14:44:13,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.511627906976744) internal successors, (324), 129 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:13,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 324 transitions. [2021-10-08 14:44:13,658 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 324 transitions. Word has length 27 [2021-10-08 14:44:13,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:13,658 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 324 transitions. [2021-10-08 14:44:13,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 324 transitions. [2021-10-08 14:44:13,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-08 14:44:13,660 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:13,660 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:13,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:13,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:13,876 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:13,877 INFO L82 PathProgramCache]: Analyzing trace with hash -679080804, now seen corresponding path program 6 times [2021-10-08 14:44:13,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:13,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502913026] [2021-10-08 14:44:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:13,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 14:44:14,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:14,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502913026] [2021-10-08 14:44:14,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502913026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:14,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163871728] [2021-10-08 14:44:14,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 14:44:14,575 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:14,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:14,577 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:14,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-08 14:44:15,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-08 14:44:15,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:44:15,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-08 14:44:15,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-08 14:44:15,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163871728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:15,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:15,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-10-08 14:44:15,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123655441] [2021-10-08 14:44:15,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-08 14:44:15,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:15,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-08 14:44:15,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-10-08 14:44:15,877 INFO L87 Difference]: Start difference. First operand 130 states and 324 transitions. Second operand has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:16,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:16,921 INFO L93 Difference]: Finished difference Result 216 states and 523 transitions. [2021-10-08 14:44:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-08 14:44:16,922 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-08 14:44:16,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:16,923 INFO L225 Difference]: With dead ends: 216 [2021-10-08 14:44:16,923 INFO L226 Difference]: Without dead ends: 203 [2021-10-08 14:44:16,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1021.9ms TimeCoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2021-10-08 14:44:16,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-10-08 14:44:16,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 106. [2021-10-08 14:44:16,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.6095238095238096) internal successors, (274), 105 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 274 transitions. [2021-10-08 14:44:16,929 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 274 transitions. Word has length 28 [2021-10-08 14:44:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:16,929 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 274 transitions. [2021-10-08 14:44:16,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.1875) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:16,930 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 274 transitions. [2021-10-08 14:44:16,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-08 14:44:16,930 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:16,930 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:16,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:17,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:17,145 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:17,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:17,146 INFO L82 PathProgramCache]: Analyzing trace with hash -2007834003, now seen corresponding path program 7 times [2021-10-08 14:44:17,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:17,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126810193] [2021-10-08 14:44:17,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:17,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:44:17,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:17,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126810193] [2021-10-08 14:44:17,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126810193] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:17,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092847639] [2021-10-08 14:44:17,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-08 14:44:17,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:17,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:17,951 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:17,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-08 14:44:18,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:18,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-08 14:44:18,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:18,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:18,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:18,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:18,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:18,602 INFO L354 Elim1Store]: treesize reduction 330, result has 13.2 percent of original size [2021-10-08 14:44:18,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 125 treesize of output 147 [2021-10-08 14:44:19,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-08 14:44:20,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:20,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:20,440 INFO L354 Elim1Store]: treesize reduction 270, result has 19.2 percent of original size [2021-10-08 14:44:20,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 74 treesize of output 120 [2021-10-08 14:44:22,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:22,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:23,103 INFO L354 Elim1Store]: treesize reduction 180, result has 32.1 percent of original size [2021-10-08 14:44:23,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 100 treesize of output 166 [2021-10-08 14:44:23,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-10-08 14:44:23,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-08 14:44:23,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-08 14:44:23,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-08 14:44:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:44:24,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092847639] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:24,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:24,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 25 [2021-10-08 14:44:24,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011742764] [2021-10-08 14:44:24,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-08 14:44:24,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:24,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-08 14:44:24,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-10-08 14:44:24,977 INFO L87 Difference]: Start difference. First operand 106 states and 274 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:26,576 INFO L93 Difference]: Finished difference Result 224 states and 564 transitions. [2021-10-08 14:44:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-08 14:44:26,577 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-08 14:44:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:26,579 INFO L225 Difference]: With dead ends: 224 [2021-10-08 14:44:26,579 INFO L226 Difference]: Without dead ends: 217 [2021-10-08 14:44:26,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 2090.3ms TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-10-08 14:44:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-10-08 14:44:26,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 195. [2021-10-08 14:44:26,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.6237113402061856) internal successors, (509), 194 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:26,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 509 transitions. [2021-10-08 14:44:26,586 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 509 transitions. Word has length 28 [2021-10-08 14:44:26,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:26,587 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 509 transitions. [2021-10-08 14:44:26,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:26,587 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 509 transitions. [2021-10-08 14:44:26,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-08 14:44:26,588 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:26,588 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:26,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:26,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-10-08 14:44:26,802 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:26,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:26,803 INFO L82 PathProgramCache]: Analyzing trace with hash 727912996, now seen corresponding path program 8 times [2021-10-08 14:44:26,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:26,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041590242] [2021-10-08 14:44:26,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:26,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:26,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 14:44:27,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:27,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041590242] [2021-10-08 14:44:27,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041590242] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:27,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449418520] [2021-10-08 14:44:27,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 14:44:27,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:27,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:27,070 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:27,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-08 14:44:27,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 14:44:27,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:44:27,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-08 14:44:27,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:28,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-08 14:44:28,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449418520] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:28,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:28,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-10-08 14:44:28,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616548452] [2021-10-08 14:44:28,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-08 14:44:28,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:28,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-08 14:44:28,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-10-08 14:44:28,190 INFO L87 Difference]: Start difference. First operand 195 states and 509 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:28,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:28,784 INFO L93 Difference]: Finished difference Result 667 states and 1733 transitions. [2021-10-08 14:44:28,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-08 14:44:28,784 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-08 14:44:28,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:28,809 INFO L225 Difference]: With dead ends: 667 [2021-10-08 14:44:28,809 INFO L226 Difference]: Without dead ends: 567 [2021-10-08 14:44:28,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 518.1ms TimeCoverageRelationStatistics Valid=207, Invalid=605, Unknown=0, NotChecked=0, Total=812 [2021-10-08 14:44:28,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-10-08 14:44:28,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 263. [2021-10-08 14:44:28,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.946564885496183) internal successors, (772), 262 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:28,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 772 transitions. [2021-10-08 14:44:28,822 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 772 transitions. Word has length 28 [2021-10-08 14:44:28,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:28,823 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 772 transitions. [2021-10-08 14:44:28,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:28,823 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 772 transitions. [2021-10-08 14:44:28,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-08 14:44:28,824 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:28,824 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:28,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:29,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:29,040 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:29,041 INFO L82 PathProgramCache]: Analyzing trace with hash 452303094, now seen corresponding path program 9 times [2021-10-08 14:44:29,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:29,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421662149] [2021-10-08 14:44:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:29,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-08 14:44:29,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:29,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421662149] [2021-10-08 14:44:29,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421662149] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:29,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137329809] [2021-10-08 14:44:29,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 14:44:29,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:29,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:29,281 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:29,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-08 14:44:29,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-08 14:44:29,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:44:29,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-08 14:44:29,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-08 14:44:30,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137329809] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:30,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:30,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-10-08 14:44:30,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363286552] [2021-10-08 14:44:30,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-08 14:44:30,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:30,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-08 14:44:30,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-10-08 14:44:30,664 INFO L87 Difference]: Start difference. First operand 263 states and 772 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:30,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:30,876 INFO L93 Difference]: Finished difference Result 501 states and 1332 transitions. [2021-10-08 14:44:30,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-08 14:44:30,877 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-08 14:44:30,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:30,881 INFO L225 Difference]: With dead ends: 501 [2021-10-08 14:44:30,881 INFO L226 Difference]: Without dead ends: 485 [2021-10-08 14:44:30,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-10-08 14:44:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-10-08 14:44:30,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 399. [2021-10-08 14:44:30,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.6733668341708543) internal successors, (1064), 398 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:30,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1064 transitions. [2021-10-08 14:44:30,897 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1064 transitions. Word has length 29 [2021-10-08 14:44:30,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:30,897 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1064 transitions. [2021-10-08 14:44:30,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1064 transitions. [2021-10-08 14:44:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-08 14:44:30,899 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:30,900 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:30,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:31,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:31,116 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:31,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:31,116 INFO L82 PathProgramCache]: Analyzing trace with hash -338297847, now seen corresponding path program 10 times [2021-10-08 14:44:31,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:31,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470642766] [2021-10-08 14:44:31,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:31,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-08 14:44:31,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:31,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470642766] [2021-10-08 14:44:31,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470642766] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:31,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329782245] [2021-10-08 14:44:31,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 14:44:31,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:31,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:31,445 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:31,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-08 14:44:32,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 14:44:32,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:44:32,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-08 14:44:32,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:32,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-08 14:44:32,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329782245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:32,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:32,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12 [2021-10-08 14:44:32,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227261050] [2021-10-08 14:44:32,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-08 14:44:32,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:32,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-08 14:44:32,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-08 14:44:32,621 INFO L87 Difference]: Start difference. First operand 399 states and 1064 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2021-10-08 14:44:32,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:32,885 INFO L93 Difference]: Finished difference Result 515 states and 1327 transitions. [2021-10-08 14:44:32,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-08 14:44:32,885 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 29 [2021-10-08 14:44:32,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:32,888 INFO L225 Difference]: With dead ends: 515 [2021-10-08 14:44:32,889 INFO L226 Difference]: Without dead ends: 472 [2021-10-08 14:44:32,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-10-08 14:44:32,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-10-08 14:44:32,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 394. [2021-10-08 14:44:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 393 states have (on average 2.717557251908397) internal successors, (1068), 393 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 1068 transitions. [2021-10-08 14:44:32,904 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 1068 transitions. Word has length 29 [2021-10-08 14:44:32,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:32,905 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 1068 transitions. [2021-10-08 14:44:32,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2021-10-08 14:44:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 1068 transitions. [2021-10-08 14:44:32,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-08 14:44:32,907 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:32,907 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:32,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:33,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-08 14:44:33,121 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:33,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:33,121 INFO L82 PathProgramCache]: Analyzing trace with hash -192420577, now seen corresponding path program 11 times [2021-10-08 14:44:33,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:33,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854463719] [2021-10-08 14:44:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:33,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:44:33,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:33,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854463719] [2021-10-08 14:44:33,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854463719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:33,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430759586] [2021-10-08 14:44:33,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 14:44:33,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:33,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:33,991 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:33,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-08 14:44:34,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-08 14:44:34,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:44:34,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-08 14:44:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 14:44:36,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430759586] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:36,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:36,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 21 [2021-10-08 14:44:36,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819461518] [2021-10-08 14:44:36,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-08 14:44:36,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:36,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-08 14:44:36,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-10-08 14:44:36,042 INFO L87 Difference]: Start difference. First operand 394 states and 1068 transitions. Second operand has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:37,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:37,398 INFO L93 Difference]: Finished difference Result 565 states and 1411 transitions. [2021-10-08 14:44:37,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-08 14:44:37,399 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-08 14:44:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:37,402 INFO L225 Difference]: With dead ends: 565 [2021-10-08 14:44:37,402 INFO L226 Difference]: Without dead ends: 474 [2021-10-08 14:44:37,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1523.5ms TimeCoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2021-10-08 14:44:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-10-08 14:44:37,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 259. [2021-10-08 14:44:37,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.0232558139534884) internal successors, (780), 258 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:37,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 780 transitions. [2021-10-08 14:44:37,417 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 780 transitions. Word has length 29 [2021-10-08 14:44:37,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:37,419 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 780 transitions. [2021-10-08 14:44:37,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.6363636363636362) internal successors, (58), 22 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:37,420 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 780 transitions. [2021-10-08 14:44:37,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-08 14:44:37,422 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:37,422 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:37,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:37,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-08 14:44:37,636 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:37,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1937862216, now seen corresponding path program 2 times [2021-10-08 14:44:37,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:37,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734051645] [2021-10-08 14:44:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:37,638 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:44:38,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:38,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734051645] [2021-10-08 14:44:38,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734051645] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:38,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425218739] [2021-10-08 14:44:38,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 14:44:38,822 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:38,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:38,826 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:38,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-08 14:44:39,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 14:44:39,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:44:39,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-08 14:44:39,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:39,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:39,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:39,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:39,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:39,787 INFO L354 Elim1Store]: treesize reduction 330, result has 13.2 percent of original size [2021-10-08 14:44:39,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 184 treesize of output 198 [2021-10-08 14:44:41,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-08 14:44:41,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:41,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:41,865 INFO L354 Elim1Store]: treesize reduction 270, result has 19.2 percent of original size [2021-10-08 14:44:41,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 32 case distinctions, treesize of input 74 treesize of output 120 [2021-10-08 14:44:42,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 86 [2021-10-08 14:44:44,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:44,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-08 14:44:44,863 INFO L354 Elim1Store]: treesize reduction 180, result has 32.1 percent of original size [2021-10-08 14:44:44,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 33 case distinctions, treesize of input 100 treesize of output 166 [2021-10-08 14:44:45,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-10-08 14:44:45,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-08 14:44:45,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-08 14:44:45,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-08 14:44:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:44:46,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425218739] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:46,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:46,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 29 [2021-10-08 14:44:46,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579968781] [2021-10-08 14:44:46,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-08 14:44:46,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:46,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-08 14:44:46,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-10-08 14:44:46,611 INFO L87 Difference]: Start difference. First operand 259 states and 780 transitions. Second operand has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:48,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:48,695 INFO L93 Difference]: Finished difference Result 426 states and 1182 transitions. [2021-10-08 14:44:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-08 14:44:48,697 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-08 14:44:48,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:48,700 INFO L225 Difference]: With dead ends: 426 [2021-10-08 14:44:48,700 INFO L226 Difference]: Without dead ends: 419 [2021-10-08 14:44:48,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 2874.8ms TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2021-10-08 14:44:48,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-10-08 14:44:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 361. [2021-10-08 14:44:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.9138888888888888) internal successors, (1049), 360 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:48,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 1049 transitions. [2021-10-08 14:44:48,713 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 1049 transitions. Word has length 30 [2021-10-08 14:44:48,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:48,714 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 1049 transitions. [2021-10-08 14:44:48,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:48,714 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 1049 transitions. [2021-10-08 14:44:48,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-08 14:44:48,715 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:48,716 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:48,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:48,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-08 14:44:48,930 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:48,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:48,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1355519447, now seen corresponding path program 12 times [2021-10-08 14:44:48,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:48,931 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394300250] [2021-10-08 14:44:48,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:48,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:49,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-08 14:44:49,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:49,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394300250] [2021-10-08 14:44:49,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394300250] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:49,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087054050] [2021-10-08 14:44:49,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 14:44:49,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:49,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:49,144 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:49,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-08 14:44:50,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-08 14:44:50,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:44:50,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 14:44:50,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-08 14:44:51,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087054050] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:51,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:51,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-08 14:44:51,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781527990] [2021-10-08 14:44:51,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-08 14:44:51,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:51,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-08 14:44:51,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-08 14:44:51,235 INFO L87 Difference]: Start difference. First operand 361 states and 1049 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:51,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:51,475 INFO L93 Difference]: Finished difference Result 343 states and 856 transitions. [2021-10-08 14:44:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-08 14:44:51,475 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-08 14:44:51,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:51,478 INFO L225 Difference]: With dead ends: 343 [2021-10-08 14:44:51,478 INFO L226 Difference]: Without dead ends: 293 [2021-10-08 14:44:51,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 399.1ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-08 14:44:51,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-10-08 14:44:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 247. [2021-10-08 14:44:51,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.605691056910569) internal successors, (641), 246 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:51,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 641 transitions. [2021-10-08 14:44:51,488 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 641 transitions. Word has length 30 [2021-10-08 14:44:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:51,488 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 641 transitions. [2021-10-08 14:44:51,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 641 transitions. [2021-10-08 14:44:51,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-08 14:44:51,490 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:51,490 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:51,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:51,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-08 14:44:51,706 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:51,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:51,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1673538805, now seen corresponding path program 3 times [2021-10-08 14:44:51,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:51,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64549157] [2021-10-08 14:44:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:51,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-08 14:44:52,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:52,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64549157] [2021-10-08 14:44:52,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64549157] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:52,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142698523] [2021-10-08 14:44:52,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 14:44:52,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:52,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:52,043 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:52,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-08 14:44:53,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-08 14:44:53,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:44:53,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-08 14:44:53,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 14:44:54,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142698523] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:54,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:54,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 21 [2021-10-08 14:44:54,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154569503] [2021-10-08 14:44:54,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-08 14:44:54,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:54,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-08 14:44:54,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2021-10-08 14:44:54,993 INFO L87 Difference]: Start difference. First operand 247 states and 641 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:55,375 INFO L93 Difference]: Finished difference Result 285 states and 719 transitions. [2021-10-08 14:44:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-08 14:44:55,376 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-08 14:44:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:55,378 INFO L225 Difference]: With dead ends: 285 [2021-10-08 14:44:55,379 INFO L226 Difference]: Without dead ends: 251 [2021-10-08 14:44:55,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 764.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-10-08 14:44:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-10-08 14:44:55,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 203. [2021-10-08 14:44:55,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.618811881188119) internal successors, (529), 202 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:55,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 529 transitions. [2021-10-08 14:44:55,388 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 529 transitions. Word has length 31 [2021-10-08 14:44:55,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:55,388 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 529 transitions. [2021-10-08 14:44:55,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 529 transitions. [2021-10-08 14:44:55,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-08 14:44:55,390 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:55,390 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:55,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:55,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-08 14:44:55,605 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:55,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1312040838, now seen corresponding path program 4 times [2021-10-08 14:44:55,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:55,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17258850] [2021-10-08 14:44:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:55,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-08 14:44:55,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:55,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17258850] [2021-10-08 14:44:55,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17258850] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:55,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444041395] [2021-10-08 14:44:55,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 14:44:55,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:55,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:55,921 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:55,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-08 14:44:56,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 14:44:56,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:44:56,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-08 14:44:56,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:44:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-08 14:44:57,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444041395] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:57,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:44:57,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-10-08 14:44:57,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930630891] [2021-10-08 14:44:57,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-08 14:44:57,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:44:57,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-08 14:44:57,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-10-08 14:44:57,369 INFO L87 Difference]: Start difference. First operand 203 states and 529 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2021-10-08 14:44:57,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:44:57,587 INFO L93 Difference]: Finished difference Result 391 states and 975 transitions. [2021-10-08 14:44:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-08 14:44:57,587 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 31 [2021-10-08 14:44:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:44:57,590 INFO L225 Difference]: With dead ends: 391 [2021-10-08 14:44:57,590 INFO L226 Difference]: Without dead ends: 352 [2021-10-08 14:44:57,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-10-08 14:44:57,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-10-08 14:44:57,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 286. [2021-10-08 14:44:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.6842105263157894) internal successors, (765), 285 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:44:57,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 765 transitions. [2021-10-08 14:44:57,600 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 765 transitions. Word has length 31 [2021-10-08 14:44:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:44:57,600 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 765 transitions. [2021-10-08 14:44:57,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2021-10-08 14:44:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 765 transitions. [2021-10-08 14:44:57,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-08 14:44:57,602 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:44:57,602 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:44:57,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-08 14:44:57,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:57,811 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:44:57,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:44:57,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1082282006, now seen corresponding path program 5 times [2021-10-08 14:44:57,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:44:57,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008024736] [2021-10-08 14:44:57,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:44:57,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:44:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:44:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:44:59,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:44:59,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008024736] [2021-10-08 14:44:59,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008024736] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:44:59,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519295555] [2021-10-08 14:44:59,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 14:44:59,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:44:59,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:44:59,048 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:44:59,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-08 14:45:00,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-08 14:45:00,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:45:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-08 14:45:00,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:45:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-08 14:45:01,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519295555] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:01,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:45:01,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 28 [2021-10-08 14:45:01,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490502763] [2021-10-08 14:45:01,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-08 14:45:01,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:45:01,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-08 14:45:01,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-10-08 14:45:01,778 INFO L87 Difference]: Start difference. First operand 286 states and 765 transitions. Second operand has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:03,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:45:03,722 INFO L93 Difference]: Finished difference Result 453 states and 1111 transitions. [2021-10-08 14:45:03,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-08 14:45:03,723 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-08 14:45:03,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:45:03,727 INFO L225 Difference]: With dead ends: 453 [2021-10-08 14:45:03,727 INFO L226 Difference]: Without dead ends: 432 [2021-10-08 14:45:03,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 2447.8ms TimeCoverageRelationStatistics Valid=318, Invalid=2334, Unknown=0, NotChecked=0, Total=2652 [2021-10-08 14:45:03,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-10-08 14:45:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 302. [2021-10-08 14:45:03,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.707641196013289) internal successors, (815), 301 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:03,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 815 transitions. [2021-10-08 14:45:03,738 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 815 transitions. Word has length 31 [2021-10-08 14:45:03,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:45:03,738 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 815 transitions. [2021-10-08 14:45:03,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:03,739 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 815 transitions. [2021-10-08 14:45:03,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-08 14:45:03,740 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:45:03,741 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:45:03,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-08 14:45:03,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:45:03,954 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:45:03,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:45:03,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2124286008, now seen corresponding path program 6 times [2021-10-08 14:45:03,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:45:03,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799153017] [2021-10-08 14:45:03,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:45:03,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:45:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:45:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-08 14:45:04,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:45:04,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799153017] [2021-10-08 14:45:04,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799153017] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:04,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24756993] [2021-10-08 14:45:04,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 14:45:04,805 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:45:04,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:45:04,807 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:45:04,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-08 14:45:05,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-08 14:45:05,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:45:05,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-08 14:45:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:45:09,754 INFO L354 Elim1Store]: treesize reduction 39, result has 38.1 percent of original size [2021-10-08 14:45:09,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 76 [2021-10-08 14:45:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 14:45:09,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24756993] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:09,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:45:09,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 27 [2021-10-08 14:45:09,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975111833] [2021-10-08 14:45:09,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-08 14:45:09,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:45:09,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-08 14:45:09,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2021-10-08 14:45:09,803 INFO L87 Difference]: Start difference. First operand 302 states and 815 transitions. Second operand has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:45:12,472 INFO L93 Difference]: Finished difference Result 1155 states and 3547 transitions. [2021-10-08 14:45:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-08 14:45:12,473 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-08 14:45:12,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:45:12,481 INFO L225 Difference]: With dead ends: 1155 [2021-10-08 14:45:12,481 INFO L226 Difference]: Without dead ends: 1114 [2021-10-08 14:45:12,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 2884.5ms TimeCoverageRelationStatistics Valid=331, Invalid=2425, Unknown=0, NotChecked=0, Total=2756 [2021-10-08 14:45:12,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-10-08 14:45:12,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 484. [2021-10-08 14:45:12,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.0683229813664594) internal successors, (1482), 483 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:12,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1482 transitions. [2021-10-08 14:45:12,509 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1482 transitions. Word has length 32 [2021-10-08 14:45:12,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:45:12,509 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1482 transitions. [2021-10-08 14:45:12,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:12,510 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1482 transitions. [2021-10-08 14:45:12,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-08 14:45:12,512 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:45:12,512 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:45:12,554 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-08 14:45:12,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:45:12,728 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:45:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:45:12,729 INFO L82 PathProgramCache]: Analyzing trace with hash 406181256, now seen corresponding path program 7 times [2021-10-08 14:45:12,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:45:12,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715121014] [2021-10-08 14:45:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:45:12,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:45:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:45:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 14:45:13,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:45:13,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715121014] [2021-10-08 14:45:13,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715121014] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:13,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937495400] [2021-10-08 14:45:13,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-08 14:45:13,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:45:13,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:45:13,601 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:45:13,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-08 14:45:14,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:45:14,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 14:45:14,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:45:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 14:45:16,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937495400] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:16,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:45:16,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 21 [2021-10-08 14:45:16,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228096235] [2021-10-08 14:45:16,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-08 14:45:16,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:45:16,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-08 14:45:16,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-10-08 14:45:16,047 INFO L87 Difference]: Start difference. First operand 484 states and 1482 transitions. Second operand has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:45:17,261 INFO L93 Difference]: Finished difference Result 715 states and 2004 transitions. [2021-10-08 14:45:17,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-08 14:45:17,262 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-08 14:45:17,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:45:17,267 INFO L225 Difference]: With dead ends: 715 [2021-10-08 14:45:17,268 INFO L226 Difference]: Without dead ends: 694 [2021-10-08 14:45:17,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1472.8ms TimeCoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2021-10-08 14:45:17,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-10-08 14:45:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 484. [2021-10-08 14:45:17,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 3.0766045548654244) internal successors, (1486), 483 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1486 transitions. [2021-10-08 14:45:17,285 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1486 transitions. Word has length 32 [2021-10-08 14:45:17,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:45:17,285 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1486 transitions. [2021-10-08 14:45:17,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.727272727272727) internal successors, (60), 22 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:17,286 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1486 transitions. [2021-10-08 14:45:17,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-08 14:45:17,287 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:45:17,288 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:45:17,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-08 14:45:17,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-08 14:45:17,504 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:45:17,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:45:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash -920356071, now seen corresponding path program 8 times [2021-10-08 14:45:17,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:45:17,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922691683] [2021-10-08 14:45:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:45:17,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:45:17,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:45:17,985 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-08 14:45:17,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:45:17,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922691683] [2021-10-08 14:45:17,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922691683] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:17,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832061937] [2021-10-08 14:45:17,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 14:45:17,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:45:17,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:45:17,986 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:45:17,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-08 14:45:19,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 14:45:19,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:45:19,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 14:45:19,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:45:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-08 14:45:20,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832061937] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:20,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:45:20,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2021-10-08 14:45:20,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025659191] [2021-10-08 14:45:20,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-08 14:45:20,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:45:20,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-08 14:45:20,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-10-08 14:45:20,570 INFO L87 Difference]: Start difference. First operand 484 states and 1486 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:21,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:45:21,362 INFO L93 Difference]: Finished difference Result 498 states and 1444 transitions. [2021-10-08 14:45:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-08 14:45:21,363 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-08 14:45:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:45:21,365 INFO L225 Difference]: With dead ends: 498 [2021-10-08 14:45:21,365 INFO L226 Difference]: Without dead ends: 409 [2021-10-08 14:45:21,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 977.3ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-10-08 14:45:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-10-08 14:45:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 373. [2021-10-08 14:45:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 3.0725806451612905) internal successors, (1143), 372 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1143 transitions. [2021-10-08 14:45:21,376 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1143 transitions. Word has length 32 [2021-10-08 14:45:21,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:45:21,377 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1143 transitions. [2021-10-08 14:45:21,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 20 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:21,377 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1143 transitions. [2021-10-08 14:45:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-08 14:45:21,379 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:45:21,379 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:45:21,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-08 14:45:21,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-08 14:45:21,593 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:45:21,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:45:21,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1276235834, now seen corresponding path program 9 times [2021-10-08 14:45:21,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:45:21,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872541223] [2021-10-08 14:45:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:45:21,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:45:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:45:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-08 14:45:23,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:45:23,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872541223] [2021-10-08 14:45:23,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872541223] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:23,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561373513] [2021-10-08 14:45:23,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 14:45:23,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:45:23,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:45:23,669 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:45:23,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-08 14:45:25,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-08 14:45:25,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:45:25,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-08 14:45:25,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:45:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-08 14:45:28,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561373513] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:28,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:45:28,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 25 [2021-10-08 14:45:28,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013156961] [2021-10-08 14:45:28,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-08 14:45:28,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:45:28,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-08 14:45:28,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2021-10-08 14:45:28,853 INFO L87 Difference]: Start difference. First operand 373 states and 1143 transitions. Second operand has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:31,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:45:31,600 INFO L93 Difference]: Finished difference Result 555 states and 1522 transitions. [2021-10-08 14:45:31,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-08 14:45:31,601 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-08 14:45:31,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:45:31,604 INFO L225 Difference]: With dead ends: 555 [2021-10-08 14:45:31,604 INFO L226 Difference]: Without dead ends: 540 [2021-10-08 14:45:31,605 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 3272.7ms TimeCoverageRelationStatistics Valid=235, Invalid=1835, Unknown=0, NotChecked=0, Total=2070 [2021-10-08 14:45:31,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-10-08 14:45:31,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 455. [2021-10-08 14:45:31,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.845814977973568) internal successors, (1292), 454 states have internal predecessors, (1292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:31,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1292 transitions. [2021-10-08 14:45:31,616 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1292 transitions. Word has length 33 [2021-10-08 14:45:31,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:45:31,616 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1292 transitions. [2021-10-08 14:45:31,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:31,617 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1292 transitions. [2021-10-08 14:45:31,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-08 14:45:31,618 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:45:31,618 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:45:31,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-08 14:45:31,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:45:31,819 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:45:31,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:45:31,820 INFO L82 PathProgramCache]: Analyzing trace with hash -756484216, now seen corresponding path program 10 times [2021-10-08 14:45:31,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:45:31,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291027938] [2021-10-08 14:45:31,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:45:31,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:45:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:45:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-08 14:45:33,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:45:33,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291027938] [2021-10-08 14:45:33,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291027938] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:33,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684732522] [2021-10-08 14:45:33,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 14:45:33,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:45:33,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:45:33,981 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:45:33,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-08 14:45:35,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 14:45:35,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:45:35,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-08 14:45:35,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:45:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 14:45:38,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684732522] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:38,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:45:38,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 27 [2021-10-08 14:45:38,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720420156] [2021-10-08 14:45:38,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-08 14:45:38,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:45:38,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-08 14:45:38,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2021-10-08 14:45:38,246 INFO L87 Difference]: Start difference. First operand 455 states and 1292 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:40,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:45:40,772 INFO L93 Difference]: Finished difference Result 630 states and 1690 transitions. [2021-10-08 14:45:40,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-08 14:45:40,772 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-08 14:45:40,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:45:40,775 INFO L225 Difference]: With dead ends: 630 [2021-10-08 14:45:40,776 INFO L226 Difference]: Without dead ends: 615 [2021-10-08 14:45:40,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 3169.1ms TimeCoverageRelationStatistics Valid=326, Invalid=2536, Unknown=0, NotChecked=0, Total=2862 [2021-10-08 14:45:40,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-10-08 14:45:40,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 377. [2021-10-08 14:45:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 3.0824468085106385) internal successors, (1159), 376 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 1159 transitions. [2021-10-08 14:45:40,788 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 1159 transitions. Word has length 34 [2021-10-08 14:45:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:45:40,789 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 1159 transitions. [2021-10-08 14:45:40,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 1159 transitions. [2021-10-08 14:45:40,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-08 14:45:40,791 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:45:40,791 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:45:40,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-08 14:45:41,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-08 14:45:41,004 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:45:41,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:45:41,005 INFO L82 PathProgramCache]: Analyzing trace with hash -897608456, now seen corresponding path program 11 times [2021-10-08 14:45:41,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:45:41,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969868631] [2021-10-08 14:45:41,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:45:41,005 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:45:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:45:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 14:45:41,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:45:41,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969868631] [2021-10-08 14:45:41,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969868631] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:41,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831122216] [2021-10-08 14:45:41,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 14:45:41,287 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:45:41,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:45:41,288 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:45:41,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-08 14:45:43,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-08 14:45:43,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:45:43,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 14:45:43,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:45:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 14:45:44,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831122216] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:44,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:45:44,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-10-08 14:45:44,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914030387] [2021-10-08 14:45:44,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-08 14:45:44,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:45:44,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-08 14:45:44,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-10-08 14:45:44,331 INFO L87 Difference]: Start difference. First operand 377 states and 1159 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:44,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:45:44,648 INFO L93 Difference]: Finished difference Result 413 states and 1207 transitions. [2021-10-08 14:45:44,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-08 14:45:44,649 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-08 14:45:44,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:45:44,652 INFO L225 Difference]: With dead ends: 413 [2021-10-08 14:45:44,652 INFO L226 Difference]: Without dead ends: 303 [2021-10-08 14:45:44,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 529.5ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-10-08 14:45:44,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-10-08 14:45:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2021-10-08 14:45:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 3.357615894039735) internal successors, (1014), 302 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:44,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 1014 transitions. [2021-10-08 14:45:44,661 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 1014 transitions. Word has length 34 [2021-10-08 14:45:44,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:45:44,662 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 1014 transitions. [2021-10-08 14:45:44,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 1014 transitions. [2021-10-08 14:45:44,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-08 14:45:44,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:45:44,664 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:45:44,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-10-08 14:45:44,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-08 14:45:44,879 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:45:44,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:45:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash 926636745, now seen corresponding path program 12 times [2021-10-08 14:45:44,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:45:44,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975969322] [2021-10-08 14:45:44,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:45:44,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:45:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:45:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-08 14:45:45,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:45:45,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975969322] [2021-10-08 14:45:45,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975969322] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:45,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979230177] [2021-10-08 14:45:45,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 14:45:45,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:45:45,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:45:45,379 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:45:45,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-08 14:45:47,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-08 14:45:47,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:45:47,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-08 14:45:47,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:45:49,671 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-08 14:45:49,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979230177] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:49,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:45:49,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-10-08 14:45:49,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189785229] [2021-10-08 14:45:49,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-08 14:45:49,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:45:49,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-08 14:45:49,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-10-08 14:45:49,674 INFO L87 Difference]: Start difference. First operand 303 states and 1014 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:45:50,289 INFO L93 Difference]: Finished difference Result 347 states and 1107 transitions. [2021-10-08 14:45:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-08 14:45:50,289 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-08 14:45:50,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:45:50,292 INFO L225 Difference]: With dead ends: 347 [2021-10-08 14:45:50,292 INFO L226 Difference]: Without dead ends: 343 [2021-10-08 14:45:50,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1215.7ms TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-10-08 14:45:50,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-10-08 14:45:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 313. [2021-10-08 14:45:50,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.298076923076923) internal successors, (1029), 312 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 1029 transitions. [2021-10-08 14:45:50,301 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 1029 transitions. Word has length 34 [2021-10-08 14:45:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:45:50,301 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 1029 transitions. [2021-10-08 14:45:50,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:45:50,302 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 1029 transitions. [2021-10-08 14:45:50,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-08 14:45:50,303 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:45:50,304 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:45:50,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-08 14:45:50,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-08 14:45:50,518 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:45:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:45:50,518 INFO L82 PathProgramCache]: Analyzing trace with hash 260065834, now seen corresponding path program 13 times [2021-10-08 14:45:50,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:45:50,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179842301] [2021-10-08 14:45:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:45:50,519 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:45:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:45:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:45:53,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:45:53,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179842301] [2021-10-08 14:45:53,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179842301] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:53,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895132740] [2021-10-08 14:45:53,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-08 14:45:53,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:45:53,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:45:53,307 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:45:53,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-08 14:45:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:45:55,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-08 14:45:55,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:45:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-08 14:45:59,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895132740] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:45:59,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:45:59,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 34 [2021-10-08 14:45:59,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881136154] [2021-10-08 14:45:59,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-08 14:45:59,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:45:59,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-08 14:45:59,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-10-08 14:45:59,332 INFO L87 Difference]: Start difference. First operand 313 states and 1029 transitions. Second operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:04,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:46:04,337 INFO L93 Difference]: Finished difference Result 582 states and 1639 transitions. [2021-10-08 14:46:04,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-08 14:46:04,338 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-08 14:46:04,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:46:04,341 INFO L225 Difference]: With dead ends: 582 [2021-10-08 14:46:04,342 INFO L226 Difference]: Without dead ends: 560 [2021-10-08 14:46:04,343 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 5998.3ms TimeCoverageRelationStatistics Valid=427, Invalid=3995, Unknown=0, NotChecked=0, Total=4422 [2021-10-08 14:46:04,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-10-08 14:46:04,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 424. [2021-10-08 14:46:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.0354609929078014) internal successors, (1284), 423 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:04,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1284 transitions. [2021-10-08 14:46:04,357 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1284 transitions. Word has length 35 [2021-10-08 14:46:04,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:46:04,358 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1284 transitions. [2021-10-08 14:46:04,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:04,358 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1284 transitions. [2021-10-08 14:46:04,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-08 14:46:04,360 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:46:04,360 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:46:04,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-08 14:46:04,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-08 14:46:04,574 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:46:04,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:46:04,574 INFO L82 PathProgramCache]: Analyzing trace with hash -779172498, now seen corresponding path program 14 times [2021-10-08 14:46:04,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:46:04,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468717810] [2021-10-08 14:46:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:46:04,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:46:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:46:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-08 14:46:05,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:46:05,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468717810] [2021-10-08 14:46:05,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468717810] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:46:05,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451994522] [2021-10-08 14:46:05,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 14:46:05,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:46:05,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:46:05,705 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:46:05,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-08 14:46:07,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 14:46:07,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:46:07,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-08 14:46:07,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:46:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-08 14:46:11,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451994522] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:46:11,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:46:11,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2021-10-08 14:46:11,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212016862] [2021-10-08 14:46:11,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-08 14:46:11,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:46:11,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-08 14:46:11,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2021-10-08 14:46:11,091 INFO L87 Difference]: Start difference. First operand 424 states and 1284 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:46:13,419 INFO L93 Difference]: Finished difference Result 679 states and 1925 transitions. [2021-10-08 14:46:13,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-08 14:46:13,420 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-08 14:46:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:46:13,424 INFO L225 Difference]: With dead ends: 679 [2021-10-08 14:46:13,425 INFO L226 Difference]: Without dead ends: 646 [2021-10-08 14:46:13,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 2858.4ms TimeCoverageRelationStatistics Valid=280, Invalid=1882, Unknown=0, NotChecked=0, Total=2162 [2021-10-08 14:46:13,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-10-08 14:46:13,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 449. [2021-10-08 14:46:13,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 3.049107142857143) internal successors, (1366), 448 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:13,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1366 transitions. [2021-10-08 14:46:13,439 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1366 transitions. Word has length 35 [2021-10-08 14:46:13,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:46:13,439 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 1366 transitions. [2021-10-08 14:46:13,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:13,440 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1366 transitions. [2021-10-08 14:46:13,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-08 14:46:13,442 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:46:13,442 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:46:13,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-08 14:46:13,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-08 14:46:13,658 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:46:13,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:46:13,658 INFO L82 PathProgramCache]: Analyzing trace with hash -689277325, now seen corresponding path program 15 times [2021-10-08 14:46:13,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:46:13,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180339700] [2021-10-08 14:46:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:46:13,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:46:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:46:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-08 14:46:14,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:46:14,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180339700] [2021-10-08 14:46:14,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180339700] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:46:14,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109570543] [2021-10-08 14:46:14,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 14:46:14,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:46:14,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:46:14,030 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:46:14,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-08 14:46:15,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-08 14:46:15,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:46:15,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-08 14:46:15,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:46:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-08 14:46:18,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109570543] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:46:18,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:46:18,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 23 [2021-10-08 14:46:18,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172186328] [2021-10-08 14:46:18,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-08 14:46:18,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:46:18,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-08 14:46:18,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-10-08 14:46:18,410 INFO L87 Difference]: Start difference. First operand 449 states and 1366 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:46:18,960 INFO L93 Difference]: Finished difference Result 503 states and 1479 transitions. [2021-10-08 14:46:18,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-08 14:46:18,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-08 14:46:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:46:18,964 INFO L225 Difference]: With dead ends: 503 [2021-10-08 14:46:18,964 INFO L226 Difference]: Without dead ends: 495 [2021-10-08 14:46:18,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1020.8ms TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2021-10-08 14:46:18,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-10-08 14:46:18,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 455. [2021-10-08 14:46:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 3.0286343612334803) internal successors, (1375), 454 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1375 transitions. [2021-10-08 14:46:18,976 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1375 transitions. Word has length 35 [2021-10-08 14:46:18,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:46:18,976 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1375 transitions. [2021-10-08 14:46:18,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:18,976 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1375 transitions. [2021-10-08 14:46:18,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-08 14:46:18,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:46:18,978 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:46:19,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-08 14:46:19,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-10-08 14:46:19,193 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:46:19,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:46:19,194 INFO L82 PathProgramCache]: Analyzing trace with hash 960281053, now seen corresponding path program 16 times [2021-10-08 14:46:19,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:46:19,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299874459] [2021-10-08 14:46:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:46:19,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:46:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:46:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:46:20,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:46:20,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299874459] [2021-10-08 14:46:20,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299874459] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:46:20,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326506269] [2021-10-08 14:46:20,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 14:46:20,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:46:20,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:46:20,938 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:46:20,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-08 14:46:22,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 14:46:22,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:46:22,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-08 14:46:22,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:46:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 14:46:26,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326506269] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:46:26,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:46:26,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 35 [2021-10-08 14:46:26,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652596622] [2021-10-08 14:46:26,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-08 14:46:26,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:46:26,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-08 14:46:26,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-10-08 14:46:26,243 INFO L87 Difference]: Start difference. First operand 455 states and 1375 transitions. Second operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:31,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:46:31,536 INFO L93 Difference]: Finished difference Result 1199 states and 3440 transitions. [2021-10-08 14:46:31,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-08 14:46:31,537 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-08 14:46:31,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:46:31,544 INFO L225 Difference]: With dead ends: 1199 [2021-10-08 14:46:31,544 INFO L226 Difference]: Without dead ends: 1114 [2021-10-08 14:46:31,545 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 5494.2ms TimeCoverageRelationStatistics Valid=359, Invalid=4063, Unknown=0, NotChecked=0, Total=4422 [2021-10-08 14:46:31,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-10-08 14:46:31,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 720. [2021-10-08 14:46:31,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 3.0611961057023644) internal successors, (2201), 719 states have internal predecessors, (2201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 2201 transitions. [2021-10-08 14:46:31,568 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 2201 transitions. Word has length 35 [2021-10-08 14:46:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:46:31,568 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 2201 transitions. [2021-10-08 14:46:31,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:31,568 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 2201 transitions. [2021-10-08 14:46:31,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-08 14:46:31,571 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:46:31,571 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:46:31,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-08 14:46:31,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:46:31,786 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:46:31,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:46:31,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1476251192, now seen corresponding path program 17 times [2021-10-08 14:46:31,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:46:31,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436603198] [2021-10-08 14:46:31,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:46:31,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:46:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:46:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 14:46:34,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:46:34,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436603198] [2021-10-08 14:46:34,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436603198] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:46:34,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203327907] [2021-10-08 14:46:34,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 14:46:34,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:46:34,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:46:34,342 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:46:34,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-08 14:46:36,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-08 14:46:36,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:46:36,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-08 14:46:36,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:46:40,316 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-08 14:46:40,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203327907] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:46:40,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:46:40,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 30 [2021-10-08 14:46:40,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770958068] [2021-10-08 14:46:40,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-08 14:46:40,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:46:40,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-08 14:46:40,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-10-08 14:46:40,319 INFO L87 Difference]: Start difference. First operand 720 states and 2201 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:46:43,587 INFO L93 Difference]: Finished difference Result 875 states and 2580 transitions. [2021-10-08 14:46:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-08 14:46:43,588 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-08 14:46:43,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:46:43,593 INFO L225 Difference]: With dead ends: 875 [2021-10-08 14:46:43,593 INFO L226 Difference]: Without dead ends: 864 [2021-10-08 14:46:43,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 4358.6ms TimeCoverageRelationStatistics Valid=298, Invalid=2564, Unknown=0, NotChecked=0, Total=2862 [2021-10-08 14:46:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2021-10-08 14:46:43,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 704. [2021-10-08 14:46:43,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 703 states have (on average 3.085348506401138) internal successors, (2169), 703 states have internal predecessors, (2169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:43,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 2169 transitions. [2021-10-08 14:46:43,617 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 2169 transitions. Word has length 36 [2021-10-08 14:46:43,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:46:43,619 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 2169 transitions. [2021-10-08 14:46:43,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:43,620 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 2169 transitions. [2021-10-08 14:46:43,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-08 14:46:43,623 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:46:43,623 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:46:43,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-08 14:46:43,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:46:43,840 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:46:43,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:46:43,840 INFO L82 PathProgramCache]: Analyzing trace with hash -516897004, now seen corresponding path program 18 times [2021-10-08 14:46:43,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:46:43,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742370294] [2021-10-08 14:46:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:46:43,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:46:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:46:44,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-08 14:46:44,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:46:44,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742370294] [2021-10-08 14:46:44,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742370294] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:46:44,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674422859] [2021-10-08 14:46:44,280 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 14:46:44,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:46:44,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:46:44,285 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:46:44,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-08 14:46:46,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-08 14:46:46,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:46:46,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-08 14:46:46,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:46:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-08 14:46:49,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674422859] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:46:49,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:46:49,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-10-08 14:46:49,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304475236] [2021-10-08 14:46:49,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-08 14:46:49,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:46:49,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-08 14:46:49,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-10-08 14:46:49,941 INFO L87 Difference]: Start difference. First operand 704 states and 2169 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:50,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:46:50,793 INFO L93 Difference]: Finished difference Result 978 states and 2997 transitions. [2021-10-08 14:46:50,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-08 14:46:50,794 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-08 14:46:50,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:46:50,800 INFO L225 Difference]: With dead ends: 978 [2021-10-08 14:46:50,800 INFO L226 Difference]: Without dead ends: 888 [2021-10-08 14:46:50,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 1216.0ms TimeCoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2021-10-08 14:46:50,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-10-08 14:46:50,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 634. [2021-10-08 14:46:50,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 3.428120063191153) internal successors, (2170), 633 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 2170 transitions. [2021-10-08 14:46:50,824 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 2170 transitions. Word has length 36 [2021-10-08 14:46:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:46:50,824 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 2170 transitions. [2021-10-08 14:46:50,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:50,825 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 2170 transitions. [2021-10-08 14:46:50,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-08 14:46:50,827 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:46:50,828 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:46:50,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-08 14:46:51,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:46:51,042 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:46:51,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:46:51,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1897415479, now seen corresponding path program 19 times [2021-10-08 14:46:51,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:46:51,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124491813] [2021-10-08 14:46:51,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:46:51,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:46:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:46:51,372 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-08 14:46:51,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:46:51,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124491813] [2021-10-08 14:46:51,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124491813] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:46:51,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63632382] [2021-10-08 14:46:51,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-08 14:46:51,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:46:51,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:46:51,375 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:46:51,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-08 14:46:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:46:53,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-08 14:46:53,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:46:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-10-08 14:46:54,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63632382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:46:54,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:46:54,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-08 14:46:54,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204220893] [2021-10-08 14:46:54,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-08 14:46:54,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:46:54,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-08 14:46:54,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-10-08 14:46:54,546 INFO L87 Difference]: Start difference. First operand 634 states and 2170 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:54,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:46:54,844 INFO L93 Difference]: Finished difference Result 830 states and 2399 transitions. [2021-10-08 14:46:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-08 14:46:54,848 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-08 14:46:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:46:54,853 INFO L225 Difference]: With dead ends: 830 [2021-10-08 14:46:54,853 INFO L226 Difference]: Without dead ends: 804 [2021-10-08 14:46:54,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 341.5ms TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-10-08 14:46:54,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-10-08 14:46:54,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 528. [2021-10-08 14:46:54,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.77988614800759) internal successors, (1465), 527 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1465 transitions. [2021-10-08 14:46:54,868 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1465 transitions. Word has length 36 [2021-10-08 14:46:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:46:54,869 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1465 transitions. [2021-10-08 14:46:54,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1465 transitions. [2021-10-08 14:46:54,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-08 14:46:54,871 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:46:54,871 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:46:54,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-08 14:46:55,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:46:55,086 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:46:55,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:46:55,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1377496913, now seen corresponding path program 20 times [2021-10-08 14:46:55,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:46:55,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651014713] [2021-10-08 14:46:55,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:46:55,087 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:46:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:46:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-08 14:46:55,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:46:55,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651014713] [2021-10-08 14:46:55,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651014713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:46:55,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190705366] [2021-10-08 14:46:55,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 14:46:55,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:46:55,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:46:55,543 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:46:55,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-08 14:46:57,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 14:46:57,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:46:57,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-08 14:46:57,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:46:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-08 14:46:58,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190705366] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:46:58,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:46:58,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 18 [2021-10-08 14:46:58,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563527742] [2021-10-08 14:46:58,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-08 14:46:58,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:46:58,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-08 14:46:58,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-10-08 14:46:58,295 INFO L87 Difference]: Start difference. First operand 528 states and 1465 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:58,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:46:58,815 INFO L93 Difference]: Finished difference Result 528 states and 1240 transitions. [2021-10-08 14:46:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-08 14:46:58,815 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-08 14:46:58,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:46:58,817 INFO L225 Difference]: With dead ends: 528 [2021-10-08 14:46:58,817 INFO L226 Difference]: Without dead ends: 481 [2021-10-08 14:46:58,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 568.5ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-10-08 14:46:58,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-10-08 14:46:58,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 393. [2021-10-08 14:46:58,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.4566326530612246) internal successors, (963), 392 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:58,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 963 transitions. [2021-10-08 14:46:58,826 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 963 transitions. Word has length 36 [2021-10-08 14:46:58,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:46:58,826 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 963 transitions. [2021-10-08 14:46:58,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:46:58,827 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 963 transitions. [2021-10-08 14:46:58,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-08 14:46:58,827 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:46:58,827 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:46:58,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-08 14:46:59,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:46:59,029 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:46:59,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:46:59,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1806521621, now seen corresponding path program 21 times [2021-10-08 14:46:59,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:46:59,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016704013] [2021-10-08 14:46:59,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:46:59,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:46:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:47:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-08 14:47:00,993 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:47:00,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016704013] [2021-10-08 14:47:00,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016704013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:47:00,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481705820] [2021-10-08 14:47:00,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 14:47:00,994 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:47:00,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:47:00,995 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:47:00,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-08 14:47:03,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-08 14:47:03,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:47:03,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-08 14:47:03,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:47:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-08 14:47:07,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481705820] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:47:07,432 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:47:07,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 38 [2021-10-08 14:47:07,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658513986] [2021-10-08 14:47:07,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-08 14:47:07,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:47:07,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-08 14:47:07,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1435, Unknown=0, NotChecked=0, Total=1560 [2021-10-08 14:47:07,435 INFO L87 Difference]: Start difference. First operand 393 states and 963 transitions. Second operand has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:11,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:47:11,577 INFO L93 Difference]: Finished difference Result 561 states and 1268 transitions. [2021-10-08 14:47:11,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-08 14:47:11,578 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-08 14:47:11,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:47:11,579 INFO L225 Difference]: With dead ends: 561 [2021-10-08 14:47:11,579 INFO L226 Difference]: Without dead ends: 540 [2021-10-08 14:47:11,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 5026.6ms TimeCoverageRelationStatistics Valid=424, Invalid=4546, Unknown=0, NotChecked=0, Total=4970 [2021-10-08 14:47:11,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-10-08 14:47:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 364. [2021-10-08 14:47:11,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.4710743801652892) internal successors, (897), 363 states have internal predecessors, (897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 897 transitions. [2021-10-08 14:47:11,588 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 897 transitions. Word has length 36 [2021-10-08 14:47:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:47:11,588 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 897 transitions. [2021-10-08 14:47:11,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.8205128205128205) internal successors, (71), 39 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:11,588 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 897 transitions. [2021-10-08 14:47:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-08 14:47:11,589 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:47:11,590 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:47:11,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-08 14:47:11,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-08 14:47:11,802 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:47:11,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:47:11,803 INFO L82 PathProgramCache]: Analyzing trace with hash 2134953580, now seen corresponding path program 22 times [2021-10-08 14:47:11,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:47:11,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145938025] [2021-10-08 14:47:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:47:11,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:47:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:47:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-08 14:47:12,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:47:12,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145938025] [2021-10-08 14:47:12,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145938025] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:47:12,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940503241] [2021-10-08 14:47:12,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 14:47:12,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:47:12,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:47:12,070 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:47:12,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-08 14:47:14,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 14:47:14,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:47:14,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-08 14:47:14,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:47:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-08 14:47:15,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940503241] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:47:15,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:47:15,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-10-08 14:47:15,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407051598] [2021-10-08 14:47:15,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-08 14:47:15,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:47:15,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-08 14:47:15,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-10-08 14:47:15,922 INFO L87 Difference]: Start difference. First operand 364 states and 897 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:16,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:47:16,944 INFO L93 Difference]: Finished difference Result 416 states and 959 transitions. [2021-10-08 14:47:16,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-08 14:47:16,945 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-08 14:47:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:47:16,946 INFO L225 Difference]: With dead ends: 416 [2021-10-08 14:47:16,946 INFO L226 Difference]: Without dead ends: 369 [2021-10-08 14:47:16,947 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1280.9ms TimeCoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-10-08 14:47:16,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-10-08 14:47:16,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 343. [2021-10-08 14:47:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.3976608187134505) internal successors, (820), 342 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:16,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 820 transitions. [2021-10-08 14:47:16,955 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 820 transitions. Word has length 37 [2021-10-08 14:47:16,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:47:16,955 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 820 transitions. [2021-10-08 14:47:16,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:16,956 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 820 transitions. [2021-10-08 14:47:16,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-08 14:47:16,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:47:16,957 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:47:16,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-08 14:47:17,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-08 14:47:17,172 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:47:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:47:17,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1762812445, now seen corresponding path program 23 times [2021-10-08 14:47:17,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:47:17,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266857862] [2021-10-08 14:47:17,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:47:17,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:47:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:47:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-08 14:47:17,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:47:17,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266857862] [2021-10-08 14:47:17,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266857862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:47:17,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073226578] [2021-10-08 14:47:17,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-08 14:47:17,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:47:17,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:47:17,748 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:47:17,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-08 14:47:20,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-08 14:47:20,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:47:20,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-08 14:47:20,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:47:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-08 14:47:23,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073226578] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:47:23,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:47:23,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2021-10-08 14:47:23,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121219023] [2021-10-08 14:47:23,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-08 14:47:23,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:47:23,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-08 14:47:23,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-10-08 14:47:23,028 INFO L87 Difference]: Start difference. First operand 343 states and 820 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:24,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:47:24,931 INFO L93 Difference]: Finished difference Result 737 states and 1836 transitions. [2021-10-08 14:47:24,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-08 14:47:24,932 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-08 14:47:24,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:47:24,934 INFO L225 Difference]: With dead ends: 737 [2021-10-08 14:47:24,934 INFO L226 Difference]: Without dead ends: 656 [2021-10-08 14:47:24,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2029.8ms TimeCoverageRelationStatistics Valid=158, Invalid=1174, Unknown=0, NotChecked=0, Total=1332 [2021-10-08 14:47:24,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-10-08 14:47:24,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 286. [2021-10-08 14:47:24,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.5649122807017544) internal successors, (731), 285 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:24,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 731 transitions. [2021-10-08 14:47:24,942 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 731 transitions. Word has length 37 [2021-10-08 14:47:24,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:47:24,942 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 731 transitions. [2021-10-08 14:47:24,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:24,942 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 731 transitions. [2021-10-08 14:47:24,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-08 14:47:24,943 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:47:24,943 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:47:24,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-08 14:47:25,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:47:25,144 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:47:25,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:47:25,146 INFO L82 PathProgramCache]: Analyzing trace with hash -140670800, now seen corresponding path program 24 times [2021-10-08 14:47:25,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:47:25,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950060648] [2021-10-08 14:47:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:47:25,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:47:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:47:26,965 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-08 14:47:26,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:47:26,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950060648] [2021-10-08 14:47:26,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950060648] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:47:26,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147445389] [2021-10-08 14:47:26,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-08 14:47:26,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:47:26,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:47:26,967 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:47:26,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-08 14:47:29,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-08 14:47:29,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:47:29,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-08 14:47:29,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:47:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-08 14:47:32,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147445389] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:47:32,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:47:32,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 34 [2021-10-08 14:47:32,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25159566] [2021-10-08 14:47:32,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-08 14:47:32,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:47:32,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-08 14:47:32,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1155, Unknown=0, NotChecked=0, Total=1260 [2021-10-08 14:47:32,734 INFO L87 Difference]: Start difference. First operand 286 states and 731 transitions. Second operand has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:37,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:47:37,378 INFO L93 Difference]: Finished difference Result 382 states and 978 transitions. [2021-10-08 14:47:37,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-08 14:47:37,379 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-08 14:47:37,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:47:37,380 INFO L225 Difference]: With dead ends: 382 [2021-10-08 14:47:37,380 INFO L226 Difference]: Without dead ends: 356 [2021-10-08 14:47:37,381 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 5838.1ms TimeCoverageRelationStatistics Valid=387, Invalid=3519, Unknown=0, NotChecked=0, Total=3906 [2021-10-08 14:47:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-10-08 14:47:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 219. [2021-10-08 14:47:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.9174311926605503) internal successors, (636), 218 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 636 transitions. [2021-10-08 14:47:37,386 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 636 transitions. Word has length 37 [2021-10-08 14:47:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:47:37,386 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 636 transitions. [2021-10-08 14:47:37,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:37,387 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 636 transitions. [2021-10-08 14:47:37,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-08 14:47:37,387 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:47:37,387 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:47:37,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-08 14:47:37,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-08 14:47:37,588 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:47:37,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:47:37,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1032730501, now seen corresponding path program 25 times [2021-10-08 14:47:37,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:47:37,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604439053] [2021-10-08 14:47:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:47:37,591 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:47:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:47:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-08 14:47:37,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:47:37,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604439053] [2021-10-08 14:47:37,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604439053] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:47:37,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312347619] [2021-10-08 14:47:37,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-08 14:47:37,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:47:37,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:47:37,991 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:47:37,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-08 14:47:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:47:40,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-08 14:47:40,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:47:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-08 14:47:42,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312347619] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:47:42,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:47:42,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2021-10-08 14:47:42,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123718584] [2021-10-08 14:47:42,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-08 14:47:42,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:47:42,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-08 14:47:42,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-10-08 14:47:42,580 INFO L87 Difference]: Start difference. First operand 219 states and 636 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:47:43,799 INFO L93 Difference]: Finished difference Result 829 states and 2319 transitions. [2021-10-08 14:47:43,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-08 14:47:43,800 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-08 14:47:43,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:47:43,803 INFO L225 Difference]: With dead ends: 829 [2021-10-08 14:47:43,803 INFO L226 Difference]: Without dead ends: 733 [2021-10-08 14:47:43,803 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 1277.2ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-10-08 14:47:43,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-10-08 14:47:43,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 315. [2021-10-08 14:47:43,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1974522292993632) internal successors, (1004), 314 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:43,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 1004 transitions. [2021-10-08 14:47:43,816 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 1004 transitions. Word has length 37 [2021-10-08 14:47:43,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:47:43,817 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 1004 transitions. [2021-10-08 14:47:43,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:43,817 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 1004 transitions. [2021-10-08 14:47:43,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-08 14:47:43,818 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:47:43,818 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:47:43,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-08 14:47:44,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:47:44,032 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:47:44,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:47:44,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1795179757, now seen corresponding path program 26 times [2021-10-08 14:47:44,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:47:44,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905030628] [2021-10-08 14:47:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:47:44,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:47:44,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:47:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 9 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-08 14:47:44,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:47:44,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905030628] [2021-10-08 14:47:44,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905030628] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:47:44,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066508930] [2021-10-08 14:47:44,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-08 14:47:44,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:47:44,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:47:44,617 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:47:44,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-08 14:47:47,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-08 14:47:47,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:47:47,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-08 14:47:47,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:47:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-08 14:47:51,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066508930] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:47:51,226 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:47:51,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2021-10-08 14:47:51,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161076176] [2021-10-08 14:47:51,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-08 14:47:51,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:47:51,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-08 14:47:51,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2021-10-08 14:47:51,228 INFO L87 Difference]: Start difference. First operand 315 states and 1004 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:47:53,314 INFO L93 Difference]: Finished difference Result 880 states and 2735 transitions. [2021-10-08 14:47:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-08 14:47:53,315 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-08 14:47:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:47:53,317 INFO L225 Difference]: With dead ends: 880 [2021-10-08 14:47:53,318 INFO L226 Difference]: Without dead ends: 812 [2021-10-08 14:47:53,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 2535.6ms TimeCoverageRelationStatistics Valid=150, Invalid=1656, Unknown=0, NotChecked=0, Total=1806 [2021-10-08 14:47:53,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-10-08 14:47:53,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 550. [2021-10-08 14:47:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 3.371584699453552) internal successors, (1851), 549 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:53,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1851 transitions. [2021-10-08 14:47:53,336 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1851 transitions. Word has length 38 [2021-10-08 14:47:53,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:47:53,337 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 1851 transitions. [2021-10-08 14:47:53,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:47:53,337 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1851 transitions. [2021-10-08 14:47:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-08 14:47:53,340 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:47:53,340 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:47:53,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-08 14:47:53,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:47:53,541 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:47:53,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:47:53,542 INFO L82 PathProgramCache]: Analyzing trace with hash -694789737, now seen corresponding path program 27 times [2021-10-08 14:47:53,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:47:53,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413639332] [2021-10-08 14:47:53,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:47:53,543 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:47:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:47:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-08 14:47:54,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:47:54,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413639332] [2021-10-08 14:47:54,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413639332] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:47:54,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565499576] [2021-10-08 14:47:54,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-08 14:47:54,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:47:54,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:47:54,290 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:47:54,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-08 14:47:57,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-08 14:47:57,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:47:57,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-08 14:47:57,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:47:57,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 179 treesize of output 171 [2021-10-08 14:47:57,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-08 14:47:57,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-08 14:48:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-08 14:48:00,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565499576] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:48:00,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:48:00,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 31 [2021-10-08 14:48:00,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921112624] [2021-10-08 14:48:00,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-08 14:48:00,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:48:00,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-08 14:48:00,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-10-08 14:48:00,127 INFO L87 Difference]: Start difference. First operand 550 states and 1851 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:48:02,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:48:02,648 INFO L93 Difference]: Finished difference Result 542 states and 1351 transitions. [2021-10-08 14:48:02,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-08 14:48:02,649 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-08 14:48:02,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:48:02,650 INFO L225 Difference]: With dead ends: 542 [2021-10-08 14:48:02,650 INFO L226 Difference]: Without dead ends: 360 [2021-10-08 14:48:02,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2970.8ms TimeCoverageRelationStatistics Valid=296, Invalid=3010, Unknown=0, NotChecked=0, Total=3306 [2021-10-08 14:48:02,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-10-08 14:48:02,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-10-08 14:48:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.883008356545961) internal successors, (1035), 359 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:48:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1035 transitions. [2021-10-08 14:48:02,660 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1035 transitions. Word has length 39 [2021-10-08 14:48:02,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:48:02,660 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 1035 transitions. [2021-10-08 14:48:02,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:48:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1035 transitions. [2021-10-08 14:48:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-08 14:48:02,662 INFO L504 BasicCegarLoop]: Found error trace [2021-10-08 14:48:02,662 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-08 14:48:02,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-08 14:48:02,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-10-08 14:48:02,865 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-08 14:48:02,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-08 14:48:02,866 INFO L82 PathProgramCache]: Analyzing trace with hash -2095808545, now seen corresponding path program 28 times [2021-10-08 14:48:02,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-08 14:48:02,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817527117] [2021-10-08 14:48:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-08 14:48:02,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-08 14:48:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-08 14:48:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-08 14:48:03,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-08 14:48:03,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817527117] [2021-10-08 14:48:03,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817527117] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:48:03,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118983553] [2021-10-08 14:48:03,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-08 14:48:03,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-08 14:48:03,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-08 14:48:03,380 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-08 14:48:03,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-08 14:48:06,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-08 14:48:06,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-08 14:48:06,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-08 14:48:06,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-08 14:48:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-08 14:48:09,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118983553] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-08 14:48:09,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-08 14:48:09,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2021-10-08 14:48:09,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408282219] [2021-10-08 14:48:09,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-08 14:48:09,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-08 14:48:09,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-08 14:48:09,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-10-08 14:48:09,965 INFO L87 Difference]: Start difference. First operand 360 states and 1035 transitions. Second operand has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:48:11,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-08 14:48:11,069 INFO L93 Difference]: Finished difference Result 316 states and 610 transitions. [2021-10-08 14:48:11,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-08 14:48:11,070 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-08 14:48:11,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-08 14:48:11,070 INFO L225 Difference]: With dead ends: 316 [2021-10-08 14:48:11,071 INFO L226 Difference]: Without dead ends: 0 [2021-10-08 14:48:11,071 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 2091.1ms TimeCoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-10-08 14:48:11,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-08 14:48:11,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-08 14:48:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:48:11,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-08 14:48:11,071 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2021-10-08 14:48:11,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-08 14:48:11,072 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-08 14:48:11,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-08 14:48:11,072 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-08 14:48:11,072 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-08 14:48:11,077 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-08 14:48:11,078 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-08 14:48:11,078 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-08 14:48:11,078 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-08 14:48:11,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-08 14:48:11,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-10-08 14:48:11,298 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-08 14:48:11,298 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-08 14:48:11,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.10 02:48:11 BasicIcfg [2021-10-08 14:48:11,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-08 14:48:11,301 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-08 14:48:11,301 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-08 14:48:11,301 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-08 14:48:11,301 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.10 02:43:34" (3/4) ... [2021-10-08 14:48:11,304 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-08 14:48:11,311 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-08 14:48:11,311 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-08 14:48:11,311 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-08 14:48:11,318 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 25 nodes and edges [2021-10-08 14:48:11,318 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-08 14:48:11,319 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-08 14:48:11,319 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-08 14:48:11,402 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-08 14:48:11,402 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-08 14:48:11,403 INFO L168 Benchmark]: Toolchain (without parser) took 279269.62 ms. Allocated memory was 60.8 MB in the beginning and 1.4 GB in the end (delta: 1.4 GB). Free memory was 36.5 MB in the beginning and 382.7 MB in the end (delta: -346.2 MB). Peak memory consumption was 1.0 GB. Max. memory is 16.1 GB. [2021-10-08 14:48:11,404 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 44.0 MB. Free memory was 21.1 MB in the beginning and 21.0 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-08 14:48:11,404 INFO L168 Benchmark]: CACSL2BoogieTranslator took 429.17 ms. Allocated memory is still 60.8 MB. Free memory was 36.1 MB in the beginning and 39.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. [2021-10-08 14:48:11,404 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.43 ms. Allocated memory is still 60.8 MB. Free memory was 39.5 MB in the beginning and 36.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-08 14:48:11,405 INFO L168 Benchmark]: Boogie Preprocessor took 78.24 ms. Allocated memory is still 60.8 MB. Free memory was 36.8 MB in the beginning and 34.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-08 14:48:11,405 INFO L168 Benchmark]: RCFGBuilder took 1285.93 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 34.5 MB in the beginning and 51.4 MB in the end (delta: -16.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. [2021-10-08 14:48:11,406 INFO L168 Benchmark]: TraceAbstraction took 277275.67 ms. Allocated memory was 73.4 MB in the beginning and 1.4 GB in the end (delta: 1.4 GB). Free memory was 51.0 MB in the beginning and 387.5 MB in the end (delta: -336.4 MB). Peak memory consumption was 1.0 GB. Max. memory is 16.1 GB. [2021-10-08 14:48:11,406 INFO L168 Benchmark]: Witness Printer took 101.47 ms. Allocated memory is still 1.4 GB. Free memory was 387.5 MB in the beginning and 382.7 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-08 14:48:11,408 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 44.0 MB. Free memory was 21.1 MB in the beginning and 21.0 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 429.17 ms. Allocated memory is still 60.8 MB. Free memory was 36.1 MB in the beginning and 39.5 MB in the end (delta: -3.4 MB). Peak memory consumption was 11.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.43 ms. Allocated memory is still 60.8 MB. Free memory was 39.5 MB in the beginning and 36.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 78.24 ms. Allocated memory is still 60.8 MB. Free memory was 36.8 MB in the beginning and 34.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1285.93 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 34.5 MB in the beginning and 51.4 MB in the end (delta: -16.9 MB). Peak memory consumption was 12.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 277275.67 ms. Allocated memory was 73.4 MB in the beginning and 1.4 GB in the end (delta: 1.4 GB). Free memory was 51.0 MB in the beginning and 387.5 MB in the end (delta: -336.4 MB). Peak memory consumption was 1.0 GB. Max. memory is 16.1 GB. * Witness Printer took 101.47 ms. Allocated memory is still 1.4 GB. Free memory was 387.5 MB in the beginning and 382.7 MB in the end (delta: 4.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 11915.3ms, 232 PlacesBefore, 33 PlacesAfterwards, 249 TransitionsBefore, 29 TransitionsAfterwards, 2442 CoEnabledTransitionPairs, 7 FixpointIterations, 161 TrivialSequentialCompositions, 44 ConcurrentSequentialCompositions, 30 TrivialYvCompositions, 9 ConcurrentYvCompositions, 21 ChoiceCompositions, 265 TotalNumberOfCompositions, 2302 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2182, positive: 2154, positive conditional: 0, positive unconditional: 2154, negative: 28, negative conditional: 0, negative unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1652, positive: 1644, positive conditional: 0, positive unconditional: 1644, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1652, positive: 1644, positive conditional: 0, positive unconditional: 1644, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 8, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 43, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 43, negative conditional: 0, negative unconditional: 43, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2182, positive: 510, positive conditional: 0, positive unconditional: 510, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 1652, unknown conditional: 0, unknown unconditional: 1652] , Statistics on independence cache: Total cache size (in pairs): 46, Positive cache size: 44, Positive conditional cache size: 0, Positive unconditional cache size: 44, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 162]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 260 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 277078.8ms, OverallIterations: 54, TraceHistogramMax: 7, EmptinessCheckTime: 89.4ms, AutomataDifference: 63473.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11977.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1430 SDtfs, 5964 SDslu, 15688 SDs, 0 SdLazy, 20358 SolverSat, 1927 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19163.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2556 GetRequests, 1052 SyntacticMatches, 0 SemanticMatches, 1504 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10817 ImplicationChecksByTransitivity, 76574.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=720occurred in iteration=42, InterpolantAutomatonStates: 999, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 621.6ms AutomataMinimizationTime, 54 MinimizatonAttempts, 6438 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1242.9ms SsaConstructionTime, 14600.1ms SatisfiabilityAnalysisTime, 121158.8ms InterpolantComputationTime, 3092 NumberOfCodeBlocks, 3087 NumberOfCodeBlocksAsserted, 182 NumberOfCheckSat, 2990 ConstructedInterpolants, 194 QuantifiedInterpolants, 68526 SizeOfPredicates, 1293 NumberOfNonLiveVariables, 14257 ConjunctsInSsa, 1121 ConjunctsInUnsatCore, 102 InterpolantComputations, 6 PerfectInterpolantSequences, 882/2258 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-08 14:48:11,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...