./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c --full-output -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-NewStatesSleepPersistentFixedOrder-NoLbe-Lockstep.epf --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/threaded-sum-2.wvr.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 f75773f59645b0ea2511bc9dd2c8c004c487e1dc -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-NewStatesSleepPersistentFixedOrder-NoLbe-Lockstep.epf ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-05 23:21:21,477 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 23:21:21,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 23:21:21,513 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 23:21:21,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 23:21:21,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 23:21:21,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 23:21:21,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 23:21:21,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 23:21:21,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 23:21:21,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 23:21:21,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 23:21:21,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 23:21:21,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 23:21:21,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 23:21:21,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 23:21:21,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 23:21:21,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 23:21:21,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 23:21:21,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 23:21:21,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 23:21:21,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 23:21:21,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 23:21:21,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 23:21:21,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 23:21:21,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 23:21:21,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 23:21:21,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 23:21:21,565 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 23:21:21,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 23:21:21,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 23:21:21,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 23:21:21,573 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 23:21:21,574 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 23:21:21,576 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 23:21:21,577 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 23:21:21,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 23:21:21,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 23:21:21,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 23:21:21,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 23:21:21,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 23:21:21,587 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-05 23:21:21,644 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 23:21:21,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 23:21:21,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 23:21:21,646 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 23:21:21,649 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 23:21:21,649 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 23:21:21,649 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 23:21:21,649 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 23:21:21,650 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 23:21:21,650 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 23:21:21,651 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 23:21:21,651 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 23:21:21,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 23:21:21,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 23:21:21,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 23:21:21,652 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 23:21:21,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 23:21:21,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 23:21:21,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 23:21:21,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 23:21:21,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 23:21:21,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 23:21:21,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 23:21:21,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 23:21:21,655 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 23:21:21,655 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 23:21:21,655 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 23:21:21,655 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 23:21:21,656 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 23:21:21,656 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 23:21:21,656 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f75773f59645b0ea2511bc9dd2c8c004c487e1dc [2021-10-05 23:21:22,026 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 23:21:22,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 23:21:22,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 23:21:22,061 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 23:21:22,062 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 23:21:22,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c [2021-10-05 23:21:22,148 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84fe6cf3e/14aeed66ca234051bfd5beab56320bc8/FLAG55928bb87 [2021-10-05 23:21:22,814 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 23:21:22,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/threaded-sum-2.wvr.c [2021-10-05 23:21:22,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84fe6cf3e/14aeed66ca234051bfd5beab56320bc8/FLAG55928bb87 [2021-10-05 23:21:23,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84fe6cf3e/14aeed66ca234051bfd5beab56320bc8 [2021-10-05 23:21:23,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 23:21:23,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 23:21:23,194 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 23:21:23,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 23:21:23,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 23:21:23,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:21:23" (1/1) ... [2021-10-05 23:21:23,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45c4dffe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:21:23, skipping insertion in model container [2021-10-05 23:21:23,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:21:23" (1/1) ... [2021-10-05 23:21:23,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 23:21:23,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 23:21:23,454 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/threaded-sum-2.wvr.c[2084,2097] [2021-10-05 23:21:23,458 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 23:21:23,469 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 23:21:23,491 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/threaded-sum-2.wvr.c[2084,2097] [2021-10-05 23:21:23,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 23:21:23,509 INFO L208 MainTranslator]: Completed translation [2021-10-05 23:21:23,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:21:23 WrapperNode [2021-10-05 23:21:23,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 23:21:23,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 23:21:23,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 23:21:23,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 23:21:23,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:21:23" (1/1) ... [2021-10-05 23:21:23,529 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:21:23" (1/1) ... [2021-10-05 23:21:23,550 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 23:21:23,552 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 23:21:23,552 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 23:21:23,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 23:21:23,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:21:23" (1/1) ... [2021-10-05 23:21:23,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:21:23" (1/1) ... [2021-10-05 23:21:23,564 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:21:23" (1/1) ... [2021-10-05 23:21:23,565 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:21:23" (1/1) ... [2021-10-05 23:21:23,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:21:23" (1/1) ... [2021-10-05 23:21:23,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:21:23" (1/1) ... [2021-10-05 23:21:23,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:21:23" (1/1) ... [2021-10-05 23:21:23,579 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 23:21:23,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 23:21:23,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 23:21:23,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 23:21:23,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:21:23" (1/1) ... [2021-10-05 23:21:23,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 23:21:23,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:23,622 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) [2021-10-05 23:21:23,644 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 [2021-10-05 23:21:23,686 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 23:21:23,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 23:21:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 23:21:23,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 23:21:23,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 23:21:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 23:21:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 23:21:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-05 23:21:23,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-05 23:21:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 23:21:23,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 23:21:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 23:21:23,689 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 23:21:23,691 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-05 23:21:24,124 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 23:21:24,125 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-05 23:21:24,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:21:24 BoogieIcfgContainer [2021-10-05 23:21:24,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 23:21:24,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 23:21:24,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 23:21:24,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 23:21:24,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 11:21:23" (1/3) ... [2021-10-05 23:21:24,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b07940e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:21:24, skipping insertion in model container [2021-10-05 23:21:24,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:21:23" (2/3) ... [2021-10-05 23:21:24,145 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b07940e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:21:24, skipping insertion in model container [2021-10-05 23:21:24,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:21:24" (3/3) ... [2021-10-05 23:21:24,147 INFO L111 eAbstractionObserver]: Analyzing ICFG threaded-sum-2.wvr.c [2021-10-05 23:21:24,154 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 23:21:24,154 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 23:21:24,155 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 23:21:24,155 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 23:21:24,192 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,193 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,193 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,194 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,195 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,195 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,195 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,196 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,200 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,200 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,200 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,201 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,204 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,204 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,205 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,205 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 23:21:24,214 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-05 23:21:24,294 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 23:21:24,311 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 [2021-10-05 23:21:24,311 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-05 23:21:24,341 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 23:21:24,355 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 75 transitions, 166 flow [2021-10-05 23:21:24,360 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 75 transitions, 166 flow [2021-10-05 23:21:24,362 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 75 places, 75 transitions, 166 flow [2021-10-05 23:21:24,452 INFO L129 PetriNetUnfolder]: 7/73 cut-off events. [2021-10-05 23:21:24,453 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-05 23:21:24,458 INFO L84 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 73 events. 7/73 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 47. Up to 3 conditions per place. [2021-10-05 23:21:24,461 INFO L116 LiptonReduction]: Number of co-enabled transitions 282 [2021-10-05 23:21:27,496 INFO L131 LiptonReduction]: Checked pairs total: 646 [2021-10-05 23:21:27,496 INFO L133 LiptonReduction]: Total number of compositions: 64 [2021-10-05 23:21:27,505 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 19 transitions, 54 flow [2021-10-05 23:21:27,519 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:27,521 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:27,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-05 23:21:27,528 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:27,529 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:27,530 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:27,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:27,535 INFO L82 PathProgramCache]: Analyzing trace with hash 410130097, now seen corresponding path program 1 times [2021-10-05 23:21:27,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:27,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589153656] [2021-10-05 23:21:27,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:27,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:27,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:27,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589153656] [2021-10-05 23:21:27,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589153656] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 23:21:27,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 23:21:27,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 23:21:27,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748147983] [2021-10-05 23:21:27,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 23:21:27,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:27,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 23:21:27,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 23:21:27,906 INFO L87 Difference]: Start difference. First operand has 34 states, 33 states have (on average 2.4545454545454546) internal successors, (81), 33 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:27,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:27,955 INFO L93 Difference]: Finished difference Result 40 states and 95 transitions. [2021-10-05 23:21:27,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 23:21:27,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-05 23:21:27,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:27,969 INFO L225 Difference]: With dead ends: 40 [2021-10-05 23:21:27,969 INFO L226 Difference]: Without dead ends: 36 [2021-10-05 23:21:27,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 23:21:27,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-05 23:21:28,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-05 23:21:28,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 35 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:28,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 85 transitions. [2021-10-05 23:21:28,013 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 85 transitions. Word has length 11 [2021-10-05 23:21:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:28,014 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 85 transitions. [2021-10-05 23:21:28,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:28,014 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 85 transitions. [2021-10-05 23:21:28,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 23:21:28,016 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:28,016 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:28,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 23:21:28,017 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:28,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:28,017 INFO L82 PathProgramCache]: Analyzing trace with hash -72716943, now seen corresponding path program 1 times [2021-10-05 23:21:28,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:28,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384528663] [2021-10-05 23:21:28,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:28,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:28,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:28,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384528663] [2021-10-05 23:21:28,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384528663] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 23:21:28,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 23:21:28,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-05 23:21:28,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35434111] [2021-10-05 23:21:28,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 23:21:28,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:28,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 23:21:28,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 23:21:28,097 INFO L87 Difference]: Start difference. First operand 36 states and 85 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:28,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:28,139 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2021-10-05 23:21:28,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 23:21:28,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 23:21:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:28,146 INFO L225 Difference]: With dead ends: 68 [2021-10-05 23:21:28,148 INFO L226 Difference]: Without dead ends: 68 [2021-10-05 23:21:28,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 23:21:28,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-05 23:21:28,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-10-05 23:21:28,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.4615384615384617) internal successors, (160), 65 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:28,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 160 transitions. [2021-10-05 23:21:28,173 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 160 transitions. Word has length 13 [2021-10-05 23:21:28,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:28,174 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 160 transitions. [2021-10-05 23:21:28,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:28,174 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 160 transitions. [2021-10-05 23:21:28,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 23:21:28,178 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:28,179 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:28,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-05 23:21:28,180 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:28,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1789320424, now seen corresponding path program 1 times [2021-10-05 23:21:28,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:28,181 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665852169] [2021-10-05 23:21:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:28,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:28,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:28,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:28,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665852169] [2021-10-05 23:21:28,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665852169] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 23:21:28,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 23:21:28,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-05 23:21:28,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445666836] [2021-10-05 23:21:28,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-05 23:21:28,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:28,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-05 23:21:28,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 23:21:28,302 INFO L87 Difference]: Start difference. First operand 66 states and 160 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:28,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:28,342 INFO L93 Difference]: Finished difference Result 88 states and 206 transitions. [2021-10-05 23:21:28,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-05 23:21:28,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 23:21:28,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:28,345 INFO L225 Difference]: With dead ends: 88 [2021-10-05 23:21:28,347 INFO L226 Difference]: Without dead ends: 88 [2021-10-05 23:21:28,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-05 23:21:28,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-05 23:21:28,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 70. [2021-10-05 23:21:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.4927536231884058) internal successors, (172), 69 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2021-10-05 23:21:28,365 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 15 [2021-10-05 23:21:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:28,366 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2021-10-05 23:21:28,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2021-10-05 23:21:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 23:21:28,368 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:28,368 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:28,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-05 23:21:28,369 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:28,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:28,370 INFO L82 PathProgramCache]: Analyzing trace with hash 771424305, now seen corresponding path program 2 times [2021-10-05 23:21:28,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:28,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830817256] [2021-10-05 23:21:28,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:28,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:28,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:28,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830817256] [2021-10-05 23:21:28,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830817256] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:28,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603970923] [2021-10-05 23:21:28,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 23:21:28,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:28,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:28,652 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) [2021-10-05 23:21:28,676 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 [2021-10-05 23:21:28,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 23:21:28,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-05 23:21:28,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:29,229 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:29,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603970923] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:29,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:29,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 23:21:29,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920857177] [2021-10-05 23:21:29,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 23:21:29,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:29,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 23:21:29,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-05 23:21:29,233 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:29,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:29,950 INFO L93 Difference]: Finished difference Result 202 states and 510 transitions. [2021-10-05 23:21:29,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 23:21:29,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 23:21:29,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:29,954 INFO L225 Difference]: With dead ends: 202 [2021-10-05 23:21:29,955 INFO L226 Difference]: Without dead ends: 180 [2021-10-05 23:21:29,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 549.3ms TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2021-10-05 23:21:29,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-10-05 23:21:29,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 104. [2021-10-05 23:21:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.6893203883495147) internal successors, (277), 103 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 277 transitions. [2021-10-05 23:21:29,972 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 277 transitions. Word has length 17 [2021-10-05 23:21:29,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:29,973 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 277 transitions. [2021-10-05 23:21:29,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 277 transitions. [2021-10-05 23:21:29,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 23:21:29,975 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:29,975 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:30,026 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 [2021-10-05 23:21:30,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:30,189 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:30,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:30,190 INFO L82 PathProgramCache]: Analyzing trace with hash -746477225, now seen corresponding path program 3 times [2021-10-05 23:21:30,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:30,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084819748] [2021-10-05 23:21:30,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:30,191 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:30,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:30,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084819748] [2021-10-05 23:21:30,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084819748] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:30,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532321110] [2021-10-05 23:21:30,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 23:21:30,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:30,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:30,456 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) [2021-10-05 23:21:30,467 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 [2021-10-05 23:21:30,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-05 23:21:30,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:30,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-05 23:21:30,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:30,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532321110] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:30,914 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:30,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2021-10-05 23:21:30,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466394256] [2021-10-05 23:21:30,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 23:21:30,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:30,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 23:21:30,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-10-05 23:21:30,917 INFO L87 Difference]: Start difference. First operand 104 states and 277 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:31,606 INFO L93 Difference]: Finished difference Result 274 states and 722 transitions. [2021-10-05 23:21:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-05 23:21:31,606 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 23:21:31,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:31,611 INFO L225 Difference]: With dead ends: 274 [2021-10-05 23:21:31,612 INFO L226 Difference]: Without dead ends: 252 [2021-10-05 23:21:31,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 515.3ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-10-05 23:21:31,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-10-05 23:21:31,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 112. [2021-10-05 23:21:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.7117117117117115) internal successors, (301), 111 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:31,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 301 transitions. [2021-10-05 23:21:31,657 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 301 transitions. Word has length 17 [2021-10-05 23:21:31,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:31,657 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 301 transitions. [2021-10-05 23:21:31,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:31,658 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 301 transitions. [2021-10-05 23:21:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 23:21:31,661 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:31,662 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:31,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-05 23:21:31,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:31,877 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:31,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1109449073, now seen corresponding path program 4 times [2021-10-05 23:21:31,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:31,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150562541] [2021-10-05 23:21:31,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:31,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:32,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:32,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150562541] [2021-10-05 23:21:32,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150562541] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:32,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281166009] [2021-10-05 23:21:32,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 23:21:32,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:32,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:32,050 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) [2021-10-05 23:21:32,059 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 [2021-10-05 23:21:32,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 23:21:32,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:32,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 23:21:32,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:32,434 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:32,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281166009] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:32,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:32,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 23:21:32,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612761305] [2021-10-05 23:21:32,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 23:21:32,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:32,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 23:21:32,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-05 23:21:32,437 INFO L87 Difference]: Start difference. First operand 112 states and 301 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:32,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:32,803 INFO L93 Difference]: Finished difference Result 235 states and 601 transitions. [2021-10-05 23:21:32,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 23:21:32,804 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 23:21:32,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:32,806 INFO L225 Difference]: With dead ends: 235 [2021-10-05 23:21:32,807 INFO L226 Difference]: Without dead ends: 196 [2021-10-05 23:21:32,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-10-05 23:21:32,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-10-05 23:21:32,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 132. [2021-10-05 23:21:32,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.7251908396946565) internal successors, (357), 131 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:32,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 357 transitions. [2021-10-05 23:21:32,819 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 357 transitions. Word has length 17 [2021-10-05 23:21:32,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:32,819 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 357 transitions. [2021-10-05 23:21:32,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 357 transitions. [2021-10-05 23:21:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 23:21:32,821 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:32,821 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:32,858 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 [2021-10-05 23:21:33,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:33,035 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:33,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:33,036 INFO L82 PathProgramCache]: Analyzing trace with hash -408452457, now seen corresponding path program 5 times [2021-10-05 23:21:33,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:33,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175893327] [2021-10-05 23:21:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:33,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:33,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:33,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:33,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175893327] [2021-10-05 23:21:33,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175893327] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:33,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228539467] [2021-10-05 23:21:33,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 23:21:33,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:33,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:33,231 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) [2021-10-05 23:21:33,242 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 [2021-10-05 23:21:33,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 23:21:33,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:33,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 23:21:33,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:33,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:33,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228539467] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:33,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:33,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-05 23:21:33,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551038931] [2021-10-05 23:21:33,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 23:21:33,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:33,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 23:21:33,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-05 23:21:33,639 INFO L87 Difference]: Start difference. First operand 132 states and 357 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:34,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:34,071 INFO L93 Difference]: Finished difference Result 208 states and 523 transitions. [2021-10-05 23:21:34,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 23:21:34,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 23:21:34,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:34,074 INFO L225 Difference]: With dead ends: 208 [2021-10-05 23:21:34,075 INFO L226 Difference]: Without dead ends: 170 [2021-10-05 23:21:34,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 377.9ms TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2021-10-05 23:21:34,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-05 23:21:34,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 148. [2021-10-05 23:21:34,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 2.7142857142857144) internal successors, (399), 147 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:34,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 399 transitions. [2021-10-05 23:21:34,086 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 399 transitions. Word has length 17 [2021-10-05 23:21:34,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:34,086 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 399 transitions. [2021-10-05 23:21:34,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:34,087 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 399 transitions. [2021-10-05 23:21:34,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 23:21:34,088 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:34,088 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:34,128 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 [2021-10-05 23:21:34,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:34,302 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:34,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:34,303 INFO L82 PathProgramCache]: Analyzing trace with hash 364746575, now seen corresponding path program 6 times [2021-10-05 23:21:34,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:34,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082121223] [2021-10-05 23:21:34,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:34,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:34,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:34,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082121223] [2021-10-05 23:21:34,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082121223] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:34,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535554429] [2021-10-05 23:21:34,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 23:21:34,424 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:34,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:34,426 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) [2021-10-05 23:21:34,449 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 [2021-10-05 23:21:34,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-05 23:21:34,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:34,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-05 23:21:34,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:34,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535554429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:34,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:34,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 23:21:34,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026083904] [2021-10-05 23:21:34,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 23:21:34,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:34,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 23:21:34,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-05 23:21:34,936 INFO L87 Difference]: Start difference. First operand 148 states and 399 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:35,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:35,384 INFO L93 Difference]: Finished difference Result 258 states and 653 transitions. [2021-10-05 23:21:35,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 23:21:35,384 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 23:21:35,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:35,387 INFO L225 Difference]: With dead ends: 258 [2021-10-05 23:21:35,387 INFO L226 Difference]: Without dead ends: 206 [2021-10-05 23:21:35,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 376.9ms TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2021-10-05 23:21:35,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-10-05 23:21:35,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 160. [2021-10-05 23:21:35,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.710691823899371) internal successors, (431), 159 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 431 transitions. [2021-10-05 23:21:35,397 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 431 transitions. Word has length 17 [2021-10-05 23:21:35,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:35,397 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 431 transitions. [2021-10-05 23:21:35,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:35,398 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 431 transitions. [2021-10-05 23:21:35,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-05 23:21:35,399 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:35,399 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:35,439 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 [2021-10-05 23:21:35,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:35,613 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:35,614 INFO L82 PathProgramCache]: Analyzing trace with hash -508240856, now seen corresponding path program 7 times [2021-10-05 23:21:35,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:35,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501142720] [2021-10-05 23:21:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:35,615 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:35,806 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:35,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:35,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501142720] [2021-10-05 23:21:35,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501142720] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:35,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190737773] [2021-10-05 23:21:35,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 23:21:35,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:35,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:35,809 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) [2021-10-05 23:21:35,812 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 [2021-10-05 23:21:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-05 23:21:35,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:36,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190737773] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:36,324 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:36,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-05 23:21:36,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331173146] [2021-10-05 23:21:36,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 23:21:36,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 23:21:36,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-10-05 23:21:36,328 INFO L87 Difference]: Start difference. First operand 160 states and 431 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-10-05 23:21:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:37,420 INFO L93 Difference]: Finished difference Result 334 states and 880 transitions. [2021-10-05 23:21:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-05 23:21:37,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 19 [2021-10-05 23:21:37,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:37,424 INFO L225 Difference]: With dead ends: 334 [2021-10-05 23:21:37,424 INFO L226 Difference]: Without dead ends: 312 [2021-10-05 23:21:37,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 861.5ms TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2021-10-05 23:21:37,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-10-05 23:21:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 212. [2021-10-05 23:21:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.7251184834123223) internal successors, (575), 211 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 575 transitions. [2021-10-05 23:21:37,440 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 575 transitions. Word has length 19 [2021-10-05 23:21:37,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:37,443 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 575 transitions. [2021-10-05 23:21:37,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-10-05 23:21:37,444 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 575 transitions. [2021-10-05 23:21:37,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-05 23:21:37,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:37,447 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:37,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-05 23:21:37,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:37,664 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:37,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:37,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2026142386, now seen corresponding path program 8 times [2021-10-05 23:21:37,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:37,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404562386] [2021-10-05 23:21:37,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:37,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:37,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:37,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404562386] [2021-10-05 23:21:37,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404562386] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:37,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962899747] [2021-10-05 23:21:37,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 23:21:37,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:37,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:37,853 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) [2021-10-05 23:21:37,864 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 [2021-10-05 23:21:38,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 23:21:38,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:38,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-05 23:21:38,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:38,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:38,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962899747] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:38,383 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:38,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2021-10-05 23:21:38,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165123891] [2021-10-05 23:21:38,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 23:21:38,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:38,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 23:21:38,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-10-05 23:21:38,385 INFO L87 Difference]: Start difference. First operand 212 states and 575 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2021-10-05 23:21:39,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:39,634 INFO L93 Difference]: Finished difference Result 472 states and 1295 transitions. [2021-10-05 23:21:39,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-05 23:21:39,635 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 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 19 [2021-10-05 23:21:39,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:39,639 INFO L225 Difference]: With dead ends: 472 [2021-10-05 23:21:39,639 INFO L226 Difference]: Without dead ends: 450 [2021-10-05 23:21:39,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 895.1ms TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2021-10-05 23:21:39,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-10-05 23:21:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 234. [2021-10-05 23:21:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.7339055793991416) internal successors, (637), 233 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 637 transitions. [2021-10-05 23:21:39,654 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 637 transitions. Word has length 19 [2021-10-05 23:21:39,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:39,655 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 637 transitions. [2021-10-05 23:21:39,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2021-10-05 23:21:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 637 transitions. [2021-10-05 23:21:39,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-05 23:21:39,656 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:39,657 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:39,696 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 [2021-10-05 23:21:39,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-05 23:21:39,871 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:39,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:39,872 INFO L82 PathProgramCache]: Analyzing trace with hash -170216088, now seen corresponding path program 9 times [2021-10-05 23:21:39,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:39,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767867194] [2021-10-05 23:21:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:39,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:39,999 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:21:40,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:40,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767867194] [2021-10-05 23:21:40,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767867194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:40,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064465107] [2021-10-05 23:21:40,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 23:21:40,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:40,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:40,003 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) [2021-10-05 23:21:40,004 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 [2021-10-05 23:21:40,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-05 23:21:40,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:40,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 23:21:40,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:40,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:40,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064465107] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:40,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:40,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-10-05 23:21:40,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091286607] [2021-10-05 23:21:40,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 23:21:40,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:40,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 23:21:40,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-10-05 23:21:40,505 INFO L87 Difference]: Start difference. First operand 234 states and 637 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-10-05 23:21:41,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:41,040 INFO L93 Difference]: Finished difference Result 406 states and 1081 transitions. [2021-10-05 23:21:41,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-05 23:21:41,041 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 19 [2021-10-05 23:21:41,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:41,044 INFO L225 Difference]: With dead ends: 406 [2021-10-05 23:21:41,044 INFO L226 Difference]: Without dead ends: 384 [2021-10-05 23:21:41,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 426.1ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-10-05 23:21:41,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-10-05 23:21:41,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 264. [2021-10-05 23:21:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.790874524714829) internal successors, (734), 263 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 734 transitions. [2021-10-05 23:21:41,060 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 734 transitions. Word has length 19 [2021-10-05 23:21:41,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:41,060 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 734 transitions. [2021-10-05 23:21:41,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-10-05 23:21:41,061 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 734 transitions. [2021-10-05 23:21:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-05 23:21:41,062 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:41,062 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:41,095 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 [2021-10-05 23:21:41,275 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,SelfDestructingSolverStorable10 [2021-10-05 23:21:41,276 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:41,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1688117618, now seen corresponding path program 10 times [2021-10-05 23:21:41,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:41,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303218663] [2021-10-05 23:21:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:41,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:41,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:41,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303218663] [2021-10-05 23:21:41,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303218663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:41,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937682003] [2021-10-05 23:21:41,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 23:21:41,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:41,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:41,448 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) [2021-10-05 23:21:41,449 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 [2021-10-05 23:21:41,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 23:21:41,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:41,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 23:21:41,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:41,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937682003] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:41,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:41,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 15 [2021-10-05 23:21:41,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801352321] [2021-10-05 23:21:41,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 23:21:41,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:41,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 23:21:41,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-10-05 23:21:41,982 INFO L87 Difference]: Start difference. First operand 264 states and 734 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2021-10-05 23:21:42,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:42,511 INFO L93 Difference]: Finished difference Result 332 states and 876 transitions. [2021-10-05 23:21:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 23:21:42,512 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 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 19 [2021-10-05 23:21:42,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:42,514 INFO L225 Difference]: With dead ends: 332 [2021-10-05 23:21:42,514 INFO L226 Difference]: Without dead ends: 296 [2021-10-05 23:21:42,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 420.3ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-10-05 23:21:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-10-05 23:21:42,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2021-10-05 23:21:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.724381625441696) internal successors, (771), 283 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 771 transitions. [2021-10-05 23:21:42,527 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 771 transitions. Word has length 19 [2021-10-05 23:21:42,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:42,528 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 771 transitions. [2021-10-05 23:21:42,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2021-10-05 23:21:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 771 transitions. [2021-10-05 23:21:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-05 23:21:42,530 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:42,530 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:42,559 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 [2021-10-05 23:21:42,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:42,744 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:42,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:42,745 INFO L82 PathProgramCache]: Analyzing trace with hash -914918586, now seen corresponding path program 11 times [2021-10-05 23:21:42,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:42,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134770916] [2021-10-05 23:21:42,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:42,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:42,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:42,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134770916] [2021-10-05 23:21:42,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134770916] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:42,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078954973] [2021-10-05 23:21:42,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 23:21:42,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:42,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:42,888 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) [2021-10-05 23:21:42,896 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 [2021-10-05 23:21:43,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-05 23:21:43,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 23:21:43,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:43,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078954973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:43,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:43,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-10-05 23:21:43,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650440043] [2021-10-05 23:21:43,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 23:21:43,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:43,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 23:21:43,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-05 23:21:43,451 INFO L87 Difference]: Start difference. First operand 284 states and 771 transitions. Second operand has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-10-05 23:21:44,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:44,082 INFO L93 Difference]: Finished difference Result 346 states and 916 transitions. [2021-10-05 23:21:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 23:21:44,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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 19 [2021-10-05 23:21:44,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:44,086 INFO L225 Difference]: With dead ends: 346 [2021-10-05 23:21:44,086 INFO L226 Difference]: Without dead ends: 324 [2021-10-05 23:21:44,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 544.6ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-10-05 23:21:44,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-10-05 23:21:44,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 254. [2021-10-05 23:21:44,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.6956521739130435) internal successors, (682), 253 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:44,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 682 transitions. [2021-10-05 23:21:44,099 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 682 transitions. Word has length 19 [2021-10-05 23:21:44,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:44,099 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 682 transitions. [2021-10-05 23:21:44,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 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) [2021-10-05 23:21:44,100 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 682 transitions. [2021-10-05 23:21:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-05 23:21:44,101 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:44,101 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:44,133 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 [2021-10-05 23:21:44,316 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,SelfDestructingSolverStorable12 [2021-10-05 23:21:44,317 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:44,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:44,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1130935207, now seen corresponding path program 12 times [2021-10-05 23:21:44,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:44,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225412127] [2021-10-05 23:21:44,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:44,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 23:21:44,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:44,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225412127] [2021-10-05 23:21:44,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225412127] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:44,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769642834] [2021-10-05 23:21:44,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 23:21:44,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:44,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:44,377 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) [2021-10-05 23:21:44,393 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 [2021-10-05 23:21:44,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-05 23:21:44,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:44,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-05 23:21:44,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:44,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-05 23:21:44,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769642834] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:44,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:44,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-05 23:21:44,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825722636] [2021-10-05 23:21:44,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-05 23:21:44,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:44,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-05 23:21:44,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-05 23:21:44,667 INFO L87 Difference]: Start difference. First operand 254 states and 682 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:44,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:44,694 INFO L93 Difference]: Finished difference Result 334 states and 878 transitions. [2021-10-05 23:21:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-05 23:21:44,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-05 23:21:44,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:44,698 INFO L225 Difference]: With dead ends: 334 [2021-10-05 23:21:44,698 INFO L226 Difference]: Without dead ends: 332 [2021-10-05 23:21:44,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-05 23:21:44,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-10-05 23:21:44,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 274. [2021-10-05 23:21:44,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.681318681318681) internal successors, (732), 273 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 732 transitions. [2021-10-05 23:21:44,710 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 732 transitions. Word has length 19 [2021-10-05 23:21:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:44,710 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 732 transitions. [2021-10-05 23:21:44,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:44,711 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 732 transitions. [2021-10-05 23:21:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 23:21:44,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:44,712 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:44,753 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 [2021-10-05 23:21:44,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:44,927 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:44,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:44,928 INFO L82 PathProgramCache]: Analyzing trace with hash -806666880, now seen corresponding path program 13 times [2021-10-05 23:21:44,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:44,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532957322] [2021-10-05 23:21:44,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:44,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:45,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:45,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532957322] [2021-10-05 23:21:45,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532957322] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:45,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98878642] [2021-10-05 23:21:45,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 23:21:45,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:45,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:45,099 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) [2021-10-05 23:21:45,100 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 [2021-10-05 23:21:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:45,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-05 23:21:45,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:45,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:45,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98878642] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:45,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:45,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-05 23:21:45,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766073808] [2021-10-05 23:21:45,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 23:21:45,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:45,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 23:21:45,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-10-05 23:21:45,780 INFO L87 Difference]: Start difference. First operand 274 states and 732 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:46,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:46,651 INFO L93 Difference]: Finished difference Result 546 states and 1444 transitions. [2021-10-05 23:21:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-05 23:21:46,654 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-05 23:21:46,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:46,659 INFO L225 Difference]: With dead ends: 546 [2021-10-05 23:21:46,659 INFO L226 Difference]: Without dead ends: 528 [2021-10-05 23:21:46,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 745.7ms TimeCoverageRelationStatistics Valid=222, Invalid=1184, Unknown=0, NotChecked=0, Total=1406 [2021-10-05 23:21:46,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-10-05 23:21:46,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 366. [2021-10-05 23:21:46,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.756164383561644) internal successors, (1006), 365 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1006 transitions. [2021-10-05 23:21:46,676 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1006 transitions. Word has length 21 [2021-10-05 23:21:46,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:46,677 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1006 transitions. [2021-10-05 23:21:46,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1006 transitions. [2021-10-05 23:21:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 23:21:46,679 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:46,679 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:46,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-05 23:21:46,892 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,SelfDestructingSolverStorable14 [2021-10-05 23:21:46,893 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:46,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:46,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1970398886, now seen corresponding path program 14 times [2021-10-05 23:21:46,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:46,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836658997] [2021-10-05 23:21:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:46,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:47,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:47,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836658997] [2021-10-05 23:21:47,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836658997] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:47,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754707337] [2021-10-05 23:21:47,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 23:21:47,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:47,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:47,075 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) [2021-10-05 23:21:47,096 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 [2021-10-05 23:21:47,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 23:21:47,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:47,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 23:21:47,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:47,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754707337] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:47,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:47,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 19 [2021-10-05 23:21:47,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30339897] [2021-10-05 23:21:47,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-05 23:21:47,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:47,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-05 23:21:47,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-10-05 23:21:47,851 INFO L87 Difference]: Start difference. First operand 366 states and 1006 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:49,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:49,021 INFO L93 Difference]: Finished difference Result 538 states and 1393 transitions. [2021-10-05 23:21:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-05 23:21:49,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-05 23:21:49,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:49,026 INFO L225 Difference]: With dead ends: 538 [2021-10-05 23:21:49,026 INFO L226 Difference]: Without dead ends: 524 [2021-10-05 23:21:49,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 873.4ms TimeCoverageRelationStatistics Valid=226, Invalid=1414, Unknown=0, NotChecked=0, Total=1640 [2021-10-05 23:21:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-10-05 23:21:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 372. [2021-10-05 23:21:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.7681940700808627) internal successors, (1027), 371 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:49,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1027 transitions. [2021-10-05 23:21:49,042 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1027 transitions. Word has length 21 [2021-10-05 23:21:49,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:49,043 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1027 transitions. [2021-10-05 23:21:49,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:49,043 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1027 transitions. [2021-10-05 23:21:49,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 23:21:49,044 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:49,044 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:49,080 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 [2021-10-05 23:21:49,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-05 23:21:49,260 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:49,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1953109696, now seen corresponding path program 15 times [2021-10-05 23:21:49,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:49,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106386103] [2021-10-05 23:21:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:49,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-05 23:21:49,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:49,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106386103] [2021-10-05 23:21:49,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106386103] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:49,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062402775] [2021-10-05 23:21:49,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 23:21:49,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:49,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:49,456 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) [2021-10-05 23:21:49,458 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 [2021-10-05 23:21:49,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-05 23:21:49,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:49,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 23:21:49,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:50,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:50,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062402775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:50,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:50,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2021-10-05 23:21:50,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810520899] [2021-10-05 23:21:50,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 23:21:50,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:50,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 23:21:50,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-10-05 23:21:50,255 INFO L87 Difference]: Start difference. First operand 372 states and 1027 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:51,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:51,204 INFO L93 Difference]: Finished difference Result 518 states and 1396 transitions. [2021-10-05 23:21:51,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-05 23:21:51,205 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-05 23:21:51,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:51,208 INFO L225 Difference]: With dead ends: 518 [2021-10-05 23:21:51,209 INFO L226 Difference]: Without dead ends: 492 [2021-10-05 23:21:51,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 846.5ms TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2021-10-05 23:21:51,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-10-05 23:21:51,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 376. [2021-10-05 23:21:51,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.7386666666666666) internal successors, (1027), 375 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:51,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1027 transitions. [2021-10-05 23:21:51,225 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1027 transitions. Word has length 21 [2021-10-05 23:21:51,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:51,226 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1027 transitions. [2021-10-05 23:21:51,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:51,226 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1027 transitions. [2021-10-05 23:21:51,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 23:21:51,227 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:51,227 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:51,269 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 [2021-10-05 23:21:51,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-05 23:21:51,443 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:51,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:51,444 INFO L82 PathProgramCache]: Analyzing trace with hash 823956070, now seen corresponding path program 16 times [2021-10-05 23:21:51,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:51,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751857315] [2021-10-05 23:21:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:51,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:51,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:51,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751857315] [2021-10-05 23:21:51,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751857315] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:51,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790927668] [2021-10-05 23:21:51,600 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 23:21:51,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:51,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:51,608 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) [2021-10-05 23:21:51,625 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 [2021-10-05 23:21:51,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 23:21:51,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:51,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 23:21:51,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:52,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790927668] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:52,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:52,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2021-10-05 23:21:52,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140809394] [2021-10-05 23:21:52,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-05 23:21:52,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:52,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-05 23:21:52,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-10-05 23:21:52,277 INFO L87 Difference]: Start difference. First operand 376 states and 1027 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:53,132 INFO L93 Difference]: Finished difference Result 414 states and 1084 transitions. [2021-10-05 23:21:53,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-05 23:21:53,133 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-05 23:21:53,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:53,136 INFO L225 Difference]: With dead ends: 414 [2021-10-05 23:21:53,136 INFO L226 Difference]: Without dead ends: 364 [2021-10-05 23:21:53,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 697.0ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-10-05 23:21:53,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-10-05 23:21:53,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 244. [2021-10-05 23:21:53,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.625514403292181) internal successors, (638), 243 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 638 transitions. [2021-10-05 23:21:53,148 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 638 transitions. Word has length 21 [2021-10-05 23:21:53,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:53,149 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 638 transitions. [2021-10-05 23:21:53,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:53,149 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 638 transitions. [2021-10-05 23:21:53,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-05 23:21:53,150 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 23:21:53,151 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 23:21:53,187 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 [2021-10-05 23:21:53,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-05 23:21:53,366 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 23:21:53,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 23:21:53,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1597155102, now seen corresponding path program 17 times [2021-10-05 23:21:53,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 23:21:53,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044200419] [2021-10-05 23:21:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 23:21:53,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 23:21:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 23:21:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:53,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 23:21:53,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044200419] [2021-10-05 23:21:53,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044200419] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:53,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821350638] [2021-10-05 23:21:53,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 23:21:53,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:53,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 23:21:53,515 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) [2021-10-05 23:21:53,517 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 [2021-10-05 23:21:53,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 23:21:53,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 23:21:53,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 23:21:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 23:21:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 23:21:54,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821350638] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 23:21:54,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 23:21:54,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 18 [2021-10-05 23:21:54,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044271483] [2021-10-05 23:21:54,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 23:21:54,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 23:21:54,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 23:21:54,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-10-05 23:21:54,190 INFO L87 Difference]: Start difference. First operand 244 states and 638 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:55,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 23:21:55,017 INFO L93 Difference]: Finished difference Result 284 states and 732 transitions. [2021-10-05 23:21:55,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-05 23:21:55,017 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-05 23:21:55,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 23:21:55,018 INFO L225 Difference]: With dead ends: 284 [2021-10-05 23:21:55,018 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 23:21:55,019 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 756.9ms TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2021-10-05 23:21:55,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 23:21:55,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 23:21:55,019 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) [2021-10-05 23:21:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 23:21:55,020 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-10-05 23:21:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 23:21:55,020 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 23:21:55,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 23:21:55,023 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 23:21:55,023 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 23:21:55,027 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 23:21:55,028 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 23:21:55,028 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 23:21:55,056 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 [2021-10-05 23:21:55,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 23:21:55,245 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 23:21:55,245 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 23:21:55,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 11:21:55 BasicIcfg [2021-10-05 23:21:55,248 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 23:21:55,249 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 23:21:55,249 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 23:21:55,249 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 23:21:55,250 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:21:24" (3/4) ... [2021-10-05 23:21:55,253 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 23:21:55,258 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 23:21:55,259 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 23:21:55,265 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-05 23:21:55,265 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-05 23:21:55,266 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 23:21:55,266 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-05 23:21:55,307 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 23:21:55,307 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 23:21:55,312 INFO L168 Benchmark]: Toolchain (without parser) took 32120.87 ms. Allocated memory was 56.6 MB in the beginning and 125.8 MB in the end (delta: 69.2 MB). Free memory was 32.6 MB in the beginning and 39.5 MB in the end (delta: -6.9 MB). Peak memory consumption was 64.9 MB. Max. memory is 16.1 GB. [2021-10-05 23:21:55,313 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 46.1 MB. Free memory is still 31.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 23:21:55,314 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.49 ms. Allocated memory is still 56.6 MB. Free memory was 32.3 MB in the beginning and 35.6 MB in the end (delta: -3.3 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-10-05 23:21:55,314 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.42 ms. Allocated memory is still 56.6 MB. Free memory was 35.6 MB in the beginning and 34.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 23:21:55,315 INFO L168 Benchmark]: Boogie Preprocessor took 28.18 ms. Allocated memory is still 56.6 MB. Free memory was 34.0 MB in the beginning and 32.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 23:21:55,315 INFO L168 Benchmark]: RCFGBuilder took 551.11 ms. Allocated memory is still 56.6 MB. Free memory was 32.6 MB in the beginning and 37.3 MB in the end (delta: -4.7 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. [2021-10-05 23:21:55,316 INFO L168 Benchmark]: TraceAbstraction took 31114.43 ms. Allocated memory was 56.6 MB in the beginning and 125.8 MB in the end (delta: 69.2 MB). Free memory was 36.8 MB in the beginning and 42.2 MB in the end (delta: -5.4 MB). Peak memory consumption was 63.9 MB. Max. memory is 16.1 GB. [2021-10-05 23:21:55,317 INFO L168 Benchmark]: Witness Printer took 58.12 ms. Allocated memory is still 125.8 MB. Free memory was 41.4 MB in the beginning and 39.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 23:21:55,320 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 46.1 MB. Free memory is still 31.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 316.49 ms. Allocated memory is still 56.6 MB. Free memory was 32.3 MB in the beginning and 35.6 MB in the end (delta: -3.3 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.42 ms. Allocated memory is still 56.6 MB. Free memory was 35.6 MB in the beginning and 34.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.18 ms. Allocated memory is still 56.6 MB. Free memory was 34.0 MB in the beginning and 32.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 551.11 ms. Allocated memory is still 56.6 MB. Free memory was 32.6 MB in the beginning and 37.3 MB in the end (delta: -4.7 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 31114.43 ms. Allocated memory was 56.6 MB in the beginning and 125.8 MB in the end (delta: 69.2 MB). Free memory was 36.8 MB in the beginning and 42.2 MB in the end (delta: -5.4 MB). Peak memory consumption was 63.9 MB. Max. memory is 16.1 GB. * Witness Printer took 58.12 ms. Allocated memory is still 125.8 MB. Free memory was 41.4 MB in the beginning and 39.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3136.9ms, 75 PlacesBefore, 23 PlacesAfterwards, 75 TransitionsBefore, 19 TransitionsAfterwards, 282 CoEnabledTransitionPairs, 7 FixpointIterations, 43 TrivialSequentialCompositions, 10 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 646 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 459, positive: 425, positive conditional: 0, positive unconditional: 425, negative: 34, negative conditional: 0, negative unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 197, positive: 192, positive conditional: 0, positive unconditional: 192, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 197, positive: 184, positive conditional: 0, positive unconditional: 184, negative: 13, negative conditional: 0, negative unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 13, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 53, positive: 41, positive conditional: 0, positive unconditional: 41, negative: 12, negative conditional: 0, negative unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 459, positive: 233, positive conditional: 0, positive unconditional: 233, negative: 29, negative conditional: 0, negative unconditional: 29, unknown: 197, unknown conditional: 0, unknown unconditional: 197] , Statistics on independence cache: Total cache size (in pairs): 36, Positive cache size: 34, Positive conditional cache size: 0, Positive unconditional cache size: 34, 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: 79]: 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 5 procedures, 81 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 30952.9ms, OverallIterations: 19, TraceHistogramMax: 3, EmptinessCheckTime: 39.6ms, AutomataDifference: 11673.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3206.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 402 SDtfs, 1533 SDslu, 2918 SDs, 0 SdLazy, 6538 SolverSat, 486 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3863.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 636 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 452 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 9244.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=376occurred in iteration=17, InterpolantAutomatonStates: 332, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 293.7ms AutomataMinimizationTime, 19 MinimizatonAttempts, 1494 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 140.8ms SsaConstructionTime, 801.6ms SatisfiabilityAnalysisTime, 8428.7ms InterpolantComputationTime, 647 NumberOfCodeBlocks, 647 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 612 ConstructedInterpolants, 0 QuantifiedInterpolants, 8229 SizeOfPredicates, 39 NumberOfNonLiveVariables, 1770 ConjunctsInSsa, 437 ConjunctsInUnsatCore, 35 InterpolantComputations, 3 PerfectInterpolantSequences, 17/299 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! [2021-10-05 23:21:55,385 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...