./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.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 00eb8a8cfda98518c894b979d88e1c1dee8b976f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-04 19:23:50,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-04 19:23:50,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-04 19:23:50,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-04 19:23:50,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-04 19:23:50,639 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-04 19:23:50,640 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-04 19:23:50,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-04 19:23:50,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-04 19:23:50,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-04 19:23:50,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-04 19:23:50,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-04 19:23:50,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-04 19:23:50,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-04 19:23:50,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-04 19:23:50,663 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-04 19:23:50,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-04 19:23:50,670 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-04 19:23:50,672 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-04 19:23:50,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-04 19:23:50,685 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-04 19:23:50,687 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-04 19:23:50,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-04 19:23:50,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-04 19:23:50,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-04 19:23:50,704 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-04 19:23:50,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-04 19:23:50,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-04 19:23:50,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-04 19:23:50,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-04 19:23:50,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-04 19:23:50,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-04 19:23:50,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-04 19:23:50,726 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-04 19:23:50,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-04 19:23:50,728 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-04 19:23:50,729 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-04 19:23:50,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-04 19:23:50,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-04 19:23:50,733 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-04 19:23:50,734 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-04 19:23:50,735 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-04 19:23:50,791 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-04 19:23:50,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-04 19:23:50,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-04 19:23:50,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-04 19:23:50,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-04 19:23:50,797 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-04 19:23:50,797 INFO L138 SettingsManager]: * Use SBE=true [2021-10-04 19:23:50,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-04 19:23:50,798 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-04 19:23:50,798 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-04 19:23:50,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-04 19:23:50,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-04 19:23:50,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-04 19:23:50,801 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-04 19:23:50,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-04 19:23:50,801 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-04 19:23:50,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-04 19:23:50,802 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-04 19:23:50,802 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-04 19:23:50,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-04 19:23:50,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-04 19:23:50,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-04 19:23:50,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-04 19:23:50,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-04 19:23:50,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-04 19:23:50,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-04 19:23:50,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-04 19:23:50,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-04 19:23:50,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-04 19:23:50,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-04 19:23:50,806 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00eb8a8cfda98518c894b979d88e1c1dee8b976f [2021-10-04 19:23:51,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-04 19:23:51,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-04 19:23:51,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-04 19:23:51,287 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-04 19:23:51,288 INFO L275 PluginConnector]: CDTParser initialized [2021-10-04 19:23:51,289 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c [2021-10-04 19:23:51,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a2e7e65e/90b381a4e2d74e868bfeb9bc4827f158/FLAG8deaf7407 [2021-10-04 19:23:51,987 INFO L306 CDTParser]: Found 1 translation units. [2021-10-04 19:23:51,988 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c [2021-10-04 19:23:51,988 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-04 19:23:51,989 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2021-10-04 19:23:52,000 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a2e7e65e/90b381a4e2d74e868bfeb9bc4827f158/FLAG8deaf7407 [2021-10-04 19:23:52,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a2e7e65e/90b381a4e2d74e868bfeb9bc4827f158 [2021-10-04 19:23:52,337 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-04 19:23:52,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-04 19:23:52,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-04 19:23:52,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-04 19:23:52,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-04 19:23:52,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 07:23:52" (1/1) ... [2021-10-04 19:23:52,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e960cee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:23:52, skipping insertion in model container [2021-10-04 19:23:52,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.10 07:23:52" (1/1) ... [2021-10-04 19:23:52,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-04 19:23:52,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-04 19:23:52,509 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-04 19:23:52,611 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c[3962,3975] [2021-10-04 19:23:52,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-04 19:23:52,661 INFO L203 MainTranslator]: Completed pre-run [2021-10-04 19:23:52,678 WARN L612 FunctionHandler]: implicit declaration of function assert [2021-10-04 19:23:52,727 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad/commit-1.wvr.c[3962,3975] [2021-10-04 19:23:52,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-04 19:23:52,752 INFO L208 MainTranslator]: Completed translation [2021-10-04 19:23:52,752 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:23:52 WrapperNode [2021-10-04 19:23:52,753 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-04 19:23:52,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-04 19:23:52,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-04 19:23:52,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-04 19:23:52,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:23:52" (1/1) ... [2021-10-04 19:23:52,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:23:52" (1/1) ... [2021-10-04 19:23:52,818 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-04 19:23:52,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-04 19:23:52,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-04 19:23:52,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-04 19:23:52,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:23:52" (1/1) ... [2021-10-04 19:23:52,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:23:52" (1/1) ... [2021-10-04 19:23:52,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:23:52" (1/1) ... [2021-10-04 19:23:52,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:23:52" (1/1) ... [2021-10-04 19:23:52,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:23:52" (1/1) ... [2021-10-04 19:23:52,856 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:23:52" (1/1) ... [2021-10-04 19:23:52,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:23:52" (1/1) ... [2021-10-04 19:23:52,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-04 19:23:52,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-04 19:23:52,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-04 19:23:52,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-04 19:23:52,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:23:52" (1/1) ... [2021-10-04 19:23:52,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-04 19:23:52,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:23:52,919 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) [2021-10-04 19:23:52,941 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 [2021-10-04 19:23:53,002 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-04 19:23:53,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-04 19:23:53,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-04 19:23:53,004 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-04 19:23:53,004 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-10-04 19:23:53,004 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-10-04 19:23:53,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-04 19:23:53,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-04 19:23:53,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-04 19:23:53,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-04 19:23:53,006 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-04 19:23:53,006 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-04 19:23:53,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-04 19:23:53,007 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-04 19:23:53,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-04 19:23:53,010 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-04 19:23:54,242 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-04 19:23:54,242 INFO L299 CfgBuilder]: Removed 48 assume(true) statements. [2021-10-04 19:23:54,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 07:23:54 BoogieIcfgContainer [2021-10-04 19:23:54,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-04 19:23:54,249 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-04 19:23:54,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-04 19:23:54,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-04 19:23:54,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.10 07:23:52" (1/3) ... [2021-10-04 19:23:54,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f2aebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 07:23:54, skipping insertion in model container [2021-10-04 19:23:54,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.10 07:23:52" (2/3) ... [2021-10-04 19:23:54,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f2aebc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 07:23:54, skipping insertion in model container [2021-10-04 19:23:54,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 07:23:54" (3/3) ... [2021-10-04 19:23:54,257 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-1.wvr.c [2021-10-04 19:23:54,263 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-04 19:23:54,263 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-04 19:23:54,264 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-04 19:23:54,264 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-04 19:23:54,316 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,317 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,317 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,317 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,317 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,318 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,318 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,318 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,318 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,319 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,319 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,319 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,320 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,320 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,320 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,320 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,321 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,321 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,321 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,321 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,322 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,322 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,322 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,322 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,323 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,323 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,323 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,323 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,324 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,324 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,324 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,324 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,325 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,325 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,325 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,325 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,326 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,326 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,326 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,326 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,327 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,327 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,327 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,328 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,328 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,328 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,328 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,329 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,329 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,329 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,329 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,330 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,330 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,330 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,330 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,331 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,331 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,331 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,331 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,332 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,332 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,332 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,332 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,333 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,333 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,333 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,334 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,334 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,334 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,334 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,335 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,335 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,335 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,335 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,336 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,336 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,336 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,336 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,337 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,337 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,337 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,338 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,338 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,338 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,338 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,339 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,339 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,339 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,343 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,343 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post19| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,343 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~nondet15| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,344 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,344 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~post17| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,344 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,344 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem18| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,344 WARN L313 ript$VariableManager]: TermVariabe thread3Thread1of1ForFork0_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,345 WARN L313 ript$VariableManager]: TermVariabe |thread3Thread1of1ForFork0_#t~mem16| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,347 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,347 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,347 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,348 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,348 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,348 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post7| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~post9| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~nondet1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,357 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,358 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,358 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,358 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork1_#t~mem8| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,360 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post14| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,360 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,360 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~nondet10| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,360 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~post12| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,361 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork2_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,361 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem11| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,361 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,361 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#t~mem13| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,362 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-04 19:23:54,369 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-10-04 19:23:54,417 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-04 19:23:54,425 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 [2021-10-04 19:23:54,425 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-10-04 19:23:54,451 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-04 19:23:54,463 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 221 transitions, 466 flow [2021-10-04 19:23:54,472 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 221 transitions, 466 flow [2021-10-04 19:23:54,474 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 207 places, 221 transitions, 466 flow [2021-10-04 19:23:54,620 INFO L129 PetriNetUnfolder]: 24/218 cut-off events. [2021-10-04 19:23:54,621 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-10-04 19:23:54,628 INFO L84 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 218 events. 24/218 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 154 event pairs, 0 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 183. Up to 6 conditions per place. [2021-10-04 19:23:54,634 INFO L116 LiptonReduction]: Number of co-enabled transitions 2196 [2021-10-04 19:24:03,477 INFO L131 LiptonReduction]: Checked pairs total: 2138 [2021-10-04 19:24:03,477 INFO L133 LiptonReduction]: Total number of compositions: 224 [2021-10-04 19:24:03,486 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 29 transitions, 82 flow [2021-10-04 19:24:03,500 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:03,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:03,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-04 19:24:03,510 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:03,511 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:03,512 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1138705212, now seen corresponding path program 1 times [2021-10-04 19:24:03,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:03,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534656601] [2021-10-04 19:24:03,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:03,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:24:03,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:03,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534656601] [2021-10-04 19:24:03,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534656601] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:24:03,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:24:03,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-04 19:24:03,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598509497] [2021-10-04 19:24:03,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-04 19:24:03,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:03,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-04 19:24:03,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-04 19:24:03,941 INFO L87 Difference]: Start difference. First operand has 47 states, 46 states have (on average 2.8260869565217392) internal successors, (130), 46 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:03,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:03,980 INFO L93 Difference]: Finished difference Result 88 states and 251 transitions. [2021-10-04 19:24:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-04 19:24:03,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-04 19:24:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:03,993 INFO L225 Difference]: With dead ends: 88 [2021-10-04 19:24:03,993 INFO L226 Difference]: Without dead ends: 81 [2021-10-04 19:24:03,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-04 19:24:04,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-04 19:24:04,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-04 19:24:04,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.9125) internal successors, (233), 80 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 233 transitions. [2021-10-04 19:24:04,037 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 233 transitions. Word has length 19 [2021-10-04 19:24:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:04,038 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 233 transitions. [2021-10-04 19:24:04,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 233 transitions. [2021-10-04 19:24:04,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-04 19:24:04,040 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:04,041 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:04,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-04 19:24:04,041 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:04,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1713708857, now seen corresponding path program 1 times [2021-10-04 19:24:04,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:04,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201205472] [2021-10-04 19:24:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:04,043 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:04,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:24:04,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:04,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201205472] [2021-10-04 19:24:04,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201205472] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:24:04,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:24:04,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-04 19:24:04,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713254537] [2021-10-04 19:24:04,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-04 19:24:04,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:04,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-04 19:24:04,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-04 19:24:04,269 INFO L87 Difference]: Start difference. First operand 81 states and 233 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:04,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:04,286 INFO L93 Difference]: Finished difference Result 77 states and 211 transitions. [2021-10-04 19:24:04,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-04 19:24:04,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-04 19:24:04,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:04,289 INFO L225 Difference]: With dead ends: 77 [2021-10-04 19:24:04,289 INFO L226 Difference]: Without dead ends: 75 [2021-10-04 19:24:04,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-04 19:24:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-04 19:24:04,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-04 19:24:04,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.7837837837837838) internal successors, (206), 74 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:04,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 206 transitions. [2021-10-04 19:24:04,304 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 206 transitions. Word has length 20 [2021-10-04 19:24:04,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:04,305 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 206 transitions. [2021-10-04 19:24:04,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:04,305 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 206 transitions. [2021-10-04 19:24:04,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-04 19:24:04,307 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:04,307 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:04,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-04 19:24:04,308 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:04,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:04,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1232014929, now seen corresponding path program 1 times [2021-10-04 19:24:04,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:04,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007618080] [2021-10-04 19:24:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:04,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:24:04,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:04,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007618080] [2021-10-04 19:24:04,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007618080] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:24:04,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:24:04,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-04 19:24:04,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125841331] [2021-10-04 19:24:04,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 19:24:04,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:04,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 19:24:04,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:24:04,462 INFO L87 Difference]: Start difference. First operand 75 states and 206 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:04,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:04,492 INFO L93 Difference]: Finished difference Result 127 states and 334 transitions. [2021-10-04 19:24:04,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 19:24:04,493 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-04 19:24:04,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:04,498 INFO L225 Difference]: With dead ends: 127 [2021-10-04 19:24:04,498 INFO L226 Difference]: Without dead ends: 121 [2021-10-04 19:24:04,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:24:04,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-10-04 19:24:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 73. [2021-10-04 19:24:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.6944444444444446) internal successors, (194), 72 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:04,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 194 transitions. [2021-10-04 19:24:04,516 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 194 transitions. Word has length 20 [2021-10-04 19:24:04,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:04,517 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 194 transitions. [2021-10-04 19:24:04,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:04,517 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 194 transitions. [2021-10-04 19:24:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-04 19:24:04,519 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:04,519 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:04,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-04 19:24:04,520 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:04,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:04,521 INFO L82 PathProgramCache]: Analyzing trace with hash 440180717, now seen corresponding path program 1 times [2021-10-04 19:24:04,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:04,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504814400] [2021-10-04 19:24:04,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:04,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:24:04,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:04,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504814400] [2021-10-04 19:24:04,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504814400] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:24:04,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:24:04,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-04 19:24:04,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328063737] [2021-10-04 19:24:04,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 19:24:04,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:04,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 19:24:04,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:24:04,600 INFO L87 Difference]: Start difference. First operand 73 states and 194 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:04,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:04,635 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2021-10-04 19:24:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 19:24:04,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-04 19:24:04,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:04,638 INFO L225 Difference]: With dead ends: 103 [2021-10-04 19:24:04,638 INFO L226 Difference]: Without dead ends: 74 [2021-10-04 19:24:04,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:24:04,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-04 19:24:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-04 19:24:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.671232876712329) internal successors, (195), 73 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 195 transitions. [2021-10-04 19:24:04,648 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 195 transitions. Word has length 20 [2021-10-04 19:24:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:04,649 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 195 transitions. [2021-10-04 19:24:04,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:04,649 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 195 transitions. [2021-10-04 19:24:04,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-04 19:24:04,651 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:04,651 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:04,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-04 19:24:04,652 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:04,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:04,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1940497892, now seen corresponding path program 1 times [2021-10-04 19:24:04,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:04,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476578492] [2021-10-04 19:24:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:04,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:24:04,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:04,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476578492] [2021-10-04 19:24:04,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476578492] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:04,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435665747] [2021-10-04 19:24:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:04,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:04,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:04,800 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) [2021-10-04 19:24:04,821 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 [2021-10-04 19:24:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:04,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-04 19:24:04,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:24:05,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435665747] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:05,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:05,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2] total 2 [2021-10-04 19:24:05,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729170667] [2021-10-04 19:24:05,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-04 19:24:05,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:05,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-04 19:24:05,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:24:05,236 INFO L87 Difference]: Start difference. First operand 74 states and 195 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:05,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:05,257 INFO L93 Difference]: Finished difference Result 103 states and 272 transitions. [2021-10-04 19:24:05,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 19:24:05,257 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-04 19:24:05,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:05,261 INFO L225 Difference]: With dead ends: 103 [2021-10-04 19:24:05,265 INFO L226 Difference]: Without dead ends: 92 [2021-10-04 19:24:05,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-04 19:24:05,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-04 19:24:05,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-04 19:24:05,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.6923076923076925) internal successors, (245), 91 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 245 transitions. [2021-10-04 19:24:05,288 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 245 transitions. Word has length 21 [2021-10-04 19:24:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:05,289 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 245 transitions. [2021-10-04 19:24:05,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:05,292 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 245 transitions. [2021-10-04 19:24:05,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-04 19:24:05,295 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:05,295 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:05,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-04 19:24:05,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:05,513 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:05,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:05,514 INFO L82 PathProgramCache]: Analyzing trace with hash -474049979, now seen corresponding path program 2 times [2021-10-04 19:24:05,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:05,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220927345] [2021-10-04 19:24:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:05,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:24:05,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:05,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220927345] [2021-10-04 19:24:05,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220927345] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:05,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454599458] [2021-10-04 19:24:05,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:24:05,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:05,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:05,702 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) [2021-10-04 19:24:05,707 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 [2021-10-04 19:24:05,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:24:05,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:05,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-04 19:24:05,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:24:06,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454599458] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:06,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:06,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 8 [2021-10-04 19:24:06,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393462722] [2021-10-04 19:24:06,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-04 19:24:06,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:06,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-04 19:24:06,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-04 19:24:06,308 INFO L87 Difference]: Start difference. First operand 92 states and 245 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:06,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:06,493 INFO L93 Difference]: Finished difference Result 215 states and 499 transitions. [2021-10-04 19:24:06,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-04 19:24:06,493 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-04 19:24:06,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:06,495 INFO L225 Difference]: With dead ends: 215 [2021-10-04 19:24:06,495 INFO L226 Difference]: Without dead ends: 147 [2021-10-04 19:24:06,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-10-04 19:24:06,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-10-04 19:24:06,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 89. [2021-10-04 19:24:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.6136363636363638) internal successors, (230), 88 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:06,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 230 transitions. [2021-10-04 19:24:06,504 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 230 transitions. Word has length 22 [2021-10-04 19:24:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:06,504 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 230 transitions. [2021-10-04 19:24:06,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 230 transitions. [2021-10-04 19:24:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-04 19:24:06,506 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:06,506 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:06,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-04 19:24:06,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-04 19:24:06,721 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:06,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:06,722 INFO L82 PathProgramCache]: Analyzing trace with hash -2031442503, now seen corresponding path program 1 times [2021-10-04 19:24:06,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:06,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41017594] [2021-10-04 19:24:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:06,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:24:07,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:07,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41017594] [2021-10-04 19:24:07,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41017594] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:07,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852554238] [2021-10-04 19:24:07,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:07,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:07,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:07,258 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) [2021-10-04 19:24:07,277 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 [2021-10-04 19:24:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:07,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-04 19:24:07,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:07,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2021-10-04 19:24:07,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-04 19:24:07,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-04 19:24:07,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-04 19:24:07,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-04 19:24:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:24:08,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852554238] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:08,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:08,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 14 [2021-10-04 19:24:08,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704361889] [2021-10-04 19:24:08,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 19:24:08,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:08,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 19:24:08,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-04 19:24:08,096 INFO L87 Difference]: Start difference. First operand 89 states and 230 transitions. Second operand has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:08,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:08,376 INFO L93 Difference]: Finished difference Result 171 states and 439 transitions. [2021-10-04 19:24:08,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-04 19:24:08,377 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-04 19:24:08,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:08,378 INFO L225 Difference]: With dead ends: 171 [2021-10-04 19:24:08,378 INFO L226 Difference]: Without dead ends: 158 [2021-10-04 19:24:08,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 410.1ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-10-04 19:24:08,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-04 19:24:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 154. [2021-10-04 19:24:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.588235294117647) internal successors, (396), 153 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:08,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 396 transitions. [2021-10-04 19:24:08,400 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 396 transitions. Word has length 22 [2021-10-04 19:24:08,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:08,400 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 396 transitions. [2021-10-04 19:24:08,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:08,401 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 396 transitions. [2021-10-04 19:24:08,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-04 19:24:08,407 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:08,408 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:08,447 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 [2021-10-04 19:24:08,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:08,623 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:08,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:08,624 INFO L82 PathProgramCache]: Analyzing trace with hash 959318512, now seen corresponding path program 2 times [2021-10-04 19:24:08,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:08,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452062627] [2021-10-04 19:24:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:08,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:08,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:24:09,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:09,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452062627] [2021-10-04 19:24:09,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452062627] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:09,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018523527] [2021-10-04 19:24:09,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:24:09,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:09,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:09,208 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) [2021-10-04 19:24:09,228 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 [2021-10-04 19:24:09,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:24:09,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:09,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 19:24:09,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:09,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:24:09,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018523527] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:09,682 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:09,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2021-10-04 19:24:09,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156912028] [2021-10-04 19:24:09,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 19:24:09,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:09,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 19:24:09,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-10-04 19:24:09,684 INFO L87 Difference]: Start difference. First operand 154 states and 396 transitions. Second operand has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:10,350 INFO L93 Difference]: Finished difference Result 387 states and 847 transitions. [2021-10-04 19:24:10,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-04 19:24:10,351 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-04 19:24:10,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:10,354 INFO L225 Difference]: With dead ends: 387 [2021-10-04 19:24:10,354 INFO L226 Difference]: Without dead ends: 374 [2021-10-04 19:24:10,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 515.3ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-10-04 19:24:10,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2021-10-04 19:24:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 119. [2021-10-04 19:24:10,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.7796610169491527) internal successors, (328), 118 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 328 transitions. [2021-10-04 19:24:10,364 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 328 transitions. Word has length 23 [2021-10-04 19:24:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:10,364 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 328 transitions. [2021-10-04 19:24:10,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:10,364 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 328 transitions. [2021-10-04 19:24:10,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-04 19:24:10,365 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:10,365 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:10,415 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 [2021-10-04 19:24:10,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:10,580 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:10,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:10,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1105830338, now seen corresponding path program 3 times [2021-10-04 19:24:10,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:10,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553867763] [2021-10-04 19:24:10,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:10,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:24:10,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:10,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553867763] [2021-10-04 19:24:10,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553867763] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:10,670 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431252922] [2021-10-04 19:24:10,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:24:10,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:10,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:10,672 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) [2021-10-04 19:24:10,695 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 [2021-10-04 19:24:10,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-04 19:24:10,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:10,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-04 19:24:10,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:24:11,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431252922] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:11,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:11,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-04 19:24:11,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476008957] [2021-10-04 19:24:11,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-04 19:24:11,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:11,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-04 19:24:11,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-04 19:24:11,146 INFO L87 Difference]: Start difference. First operand 119 states and 328 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:11,266 INFO L93 Difference]: Finished difference Result 259 states and 688 transitions. [2021-10-04 19:24:11,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 19:24:11,267 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-04 19:24:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:11,269 INFO L225 Difference]: With dead ends: 259 [2021-10-04 19:24:11,270 INFO L226 Difference]: Without dead ends: 247 [2021-10-04 19:24:11,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-04 19:24:11,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-10-04 19:24:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 167. [2021-10-04 19:24:11,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.680722891566265) internal successors, (445), 166 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:11,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 445 transitions. [2021-10-04 19:24:11,278 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 445 transitions. Word has length 23 [2021-10-04 19:24:11,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:11,279 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 445 transitions. [2021-10-04 19:24:11,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:11,279 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 445 transitions. [2021-10-04 19:24:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-04 19:24:11,280 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:11,281 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:11,316 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 [2021-10-04 19:24:11,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:11,497 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:11,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:11,498 INFO L82 PathProgramCache]: Analyzing trace with hash -472443534, now seen corresponding path program 1 times [2021-10-04 19:24:11,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:11,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495170337] [2021-10-04 19:24:11,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:11,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:24:11,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:11,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495170337] [2021-10-04 19:24:11,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495170337] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-04 19:24:11,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-04 19:24:11,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-04 19:24:11,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6217260] [2021-10-04 19:24:11,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-04 19:24:11,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:11,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-04 19:24:11,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-04 19:24:11,596 INFO L87 Difference]: Start difference. First operand 167 states and 445 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:11,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:11,613 INFO L93 Difference]: Finished difference Result 193 states and 481 transitions. [2021-10-04 19:24:11,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-04 19:24:11,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-10-04 19:24:11,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:11,616 INFO L225 Difference]: With dead ends: 193 [2021-10-04 19:24:11,616 INFO L226 Difference]: Without dead ends: 170 [2021-10-04 19:24:11,616 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-04 19:24:11,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-10-04 19:24:11,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 152. [2021-10-04 19:24:11,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.622516556291391) internal successors, (396), 151 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 396 transitions. [2021-10-04 19:24:11,623 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 396 transitions. Word has length 23 [2021-10-04 19:24:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:11,623 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 396 transitions. [2021-10-04 19:24:11,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 396 transitions. [2021-10-04 19:24:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-04 19:24:11,624 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:11,624 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:11,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-04 19:24:11,625 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:11,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:11,625 INFO L82 PathProgramCache]: Analyzing trace with hash -2115479223, now seen corresponding path program 1 times [2021-10-04 19:24:11,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:11,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245065131] [2021-10-04 19:24:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:11,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:24:12,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:12,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245065131] [2021-10-04 19:24:12,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245065131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:12,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666722423] [2021-10-04 19:24:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:12,043 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:12,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:12,044 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) [2021-10-04 19:24:12,071 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 [2021-10-04 19:24:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:12,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-04 19:24:12,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:24:12,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666722423] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:12,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:12,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 11 [2021-10-04 19:24:12,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098459824] [2021-10-04 19:24:12,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-04 19:24:12,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:12,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-04 19:24:12,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-10-04 19:24:12,591 INFO L87 Difference]: Start difference. First operand 152 states and 396 transitions. Second operand has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:12,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:12,899 INFO L93 Difference]: Finished difference Result 277 states and 707 transitions. [2021-10-04 19:24:12,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-04 19:24:12,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-04 19:24:12,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:12,903 INFO L225 Difference]: With dead ends: 277 [2021-10-04 19:24:12,903 INFO L226 Difference]: Without dead ends: 264 [2021-10-04 19:24:12,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-10-04 19:24:12,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-10-04 19:24:12,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 176. [2021-10-04 19:24:12,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.76) internal successors, (483), 175 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:12,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 483 transitions. [2021-10-04 19:24:12,912 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 483 transitions. Word has length 24 [2021-10-04 19:24:12,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:12,912 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 483 transitions. [2021-10-04 19:24:12,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 483 transitions. [2021-10-04 19:24:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-04 19:24:12,914 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:12,914 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:12,954 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 [2021-10-04 19:24:13,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-04 19:24:13,129 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:13,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:13,130 INFO L82 PathProgramCache]: Analyzing trace with hash 453674801, now seen corresponding path program 1 times [2021-10-04 19:24:13,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:13,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819611675] [2021-10-04 19:24:13,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:13,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:13,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:24:13,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:13,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819611675] [2021-10-04 19:24:13,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819611675] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:13,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115019343] [2021-10-04 19:24:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:13,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:13,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:13,257 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) [2021-10-04 19:24:13,266 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 [2021-10-04 19:24:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:13,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-04 19:24:13,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:24:13,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115019343] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:13,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:13,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-04 19:24:13,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026474540] [2021-10-04 19:24:13,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-04 19:24:13,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:13,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-04 19:24:13,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-04 19:24:13,852 INFO L87 Difference]: Start difference. First operand 176 states and 483 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:13,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:13,933 INFO L93 Difference]: Finished difference Result 162 states and 412 transitions. [2021-10-04 19:24:13,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-04 19:24:13,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-04 19:24:13,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:13,935 INFO L225 Difference]: With dead ends: 162 [2021-10-04 19:24:13,936 INFO L226 Difference]: Without dead ends: 133 [2021-10-04 19:24:13,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 76.5ms TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-04 19:24:13,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-04 19:24:13,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2021-10-04 19:24:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.742424242424242) internal successors, (362), 132 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:13,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 362 transitions. [2021-10-04 19:24:13,941 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 362 transitions. Word has length 24 [2021-10-04 19:24:13,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:13,942 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 362 transitions. [2021-10-04 19:24:13,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:13,942 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 362 transitions. [2021-10-04 19:24:13,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-04 19:24:13,943 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:13,943 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:13,978 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 [2021-10-04 19:24:14,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:14,157 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:14,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:14,158 INFO L82 PathProgramCache]: Analyzing trace with hash 583998638, now seen corresponding path program 2 times [2021-10-04 19:24:14,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:14,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732987055] [2021-10-04 19:24:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:14,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:14,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:24:14,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:14,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732987055] [2021-10-04 19:24:14,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732987055] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:14,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449498001] [2021-10-04 19:24:14,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:24:14,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:14,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:14,307 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) [2021-10-04 19:24:14,327 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 [2021-10-04 19:24:14,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:24:14,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:14,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-04 19:24:14,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:24:15,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449498001] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:15,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:15,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-10-04 19:24:15,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590119405] [2021-10-04 19:24:15,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-04 19:24:15,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:15,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-04 19:24:15,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-04 19:24:15,064 INFO L87 Difference]: Start difference. First operand 133 states and 362 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:15,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:15,158 INFO L93 Difference]: Finished difference Result 129 states and 332 transitions. [2021-10-04 19:24:15,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-04 19:24:15,159 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-04 19:24:15,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:15,160 INFO L225 Difference]: With dead ends: 129 [2021-10-04 19:24:15,160 INFO L226 Difference]: Without dead ends: 113 [2021-10-04 19:24:15,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-04 19:24:15,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-04 19:24:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-10-04 19:24:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.544642857142857) internal successors, (285), 112 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:15,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 285 transitions. [2021-10-04 19:24:15,165 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 285 transitions. Word has length 25 [2021-10-04 19:24:15,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:15,165 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 285 transitions. [2021-10-04 19:24:15,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:15,165 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 285 transitions. [2021-10-04 19:24:15,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-04 19:24:15,166 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:15,166 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:15,207 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 [2021-10-04 19:24:15,378 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,SelfDestructingSolverStorable12 [2021-10-04 19:24:15,379 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:15,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:15,380 INFO L82 PathProgramCache]: Analyzing trace with hash 40429422, now seen corresponding path program 1 times [2021-10-04 19:24:15,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:15,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127610227] [2021-10-04 19:24:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:15,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:24:16,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:16,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127610227] [2021-10-04 19:24:16,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127610227] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:16,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205500627] [2021-10-04 19:24:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:16,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:16,233 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) [2021-10-04 19:24:16,251 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 [2021-10-04 19:24:16,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:16,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-04 19:24:16,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:16,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-04 19:24:16,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-04 19:24:16,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-04 19:24:16,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-10-04 19:24:17,522 INFO L354 Elim1Store]: treesize reduction 39, result has 38.1 percent of original size [2021-10-04 19:24:17,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 123 treesize of output 74 [2021-10-04 19:24:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:24:17,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205500627] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:17,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:17,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 19 [2021-10-04 19:24:17,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639605655] [2021-10-04 19:24:17,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-04 19:24:17,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:17,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-04 19:24:17,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-10-04 19:24:17,583 INFO L87 Difference]: Start difference. First operand 113 states and 285 transitions. Second operand has 21 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:19,128 INFO L93 Difference]: Finished difference Result 249 states and 620 transitions. [2021-10-04 19:24:19,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-04 19:24:19,128 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-04 19:24:19,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:19,131 INFO L225 Difference]: With dead ends: 249 [2021-10-04 19:24:19,131 INFO L226 Difference]: Without dead ends: 236 [2021-10-04 19:24:19,132 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1720.6ms TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2021-10-04 19:24:19,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-10-04 19:24:19,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2021-10-04 19:24:19,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.6411764705882352) internal successors, (449), 170 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 449 transitions. [2021-10-04 19:24:19,140 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 449 transitions. Word has length 25 [2021-10-04 19:24:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:19,141 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 449 transitions. [2021-10-04 19:24:19,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 449 transitions. [2021-10-04 19:24:19,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-04 19:24:19,142 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:19,142 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:19,180 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 [2021-10-04 19:24:19,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:19,358 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:19,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:19,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1573255049, now seen corresponding path program 2 times [2021-10-04 19:24:19,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:19,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047264383] [2021-10-04 19:24:19,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:19,360 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:24:19,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:19,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047264383] [2021-10-04 19:24:19,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047264383] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:19,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692027650] [2021-10-04 19:24:19,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:24:19,479 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:19,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:19,480 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) [2021-10-04 19:24:19,494 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 [2021-10-04 19:24:19,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:24:19,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:19,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-04 19:24:19,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:20,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:24:20,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692027650] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:20,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:20,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-04 19:24:20,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695201135] [2021-10-04 19:24:20,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-04 19:24:20,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:20,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-04 19:24:20,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-04 19:24:20,280 INFO L87 Difference]: Start difference. First operand 171 states and 449 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:20,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:20,408 INFO L93 Difference]: Finished difference Result 418 states and 1076 transitions. [2021-10-04 19:24:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-04 19:24:20,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-04 19:24:20,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:20,413 INFO L225 Difference]: With dead ends: 418 [2021-10-04 19:24:20,413 INFO L226 Difference]: Without dead ends: 402 [2021-10-04 19:24:20,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-10-04 19:24:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-10-04 19:24:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 300. [2021-10-04 19:24:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.6923076923076925) internal successors, (805), 299 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 805 transitions. [2021-10-04 19:24:20,427 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 805 transitions. Word has length 26 [2021-10-04 19:24:20,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:20,429 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 805 transitions. [2021-10-04 19:24:20,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 805 transitions. [2021-10-04 19:24:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-04 19:24:20,430 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:20,430 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:20,475 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 [2021-10-04 19:24:20,631 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,SelfDestructingSolverStorable14 [2021-10-04 19:24:20,631 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1937952245, now seen corresponding path program 3 times [2021-10-04 19:24:20,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:20,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862377429] [2021-10-04 19:24:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:20,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:20,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:24:20,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:20,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862377429] [2021-10-04 19:24:20,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862377429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:20,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731301845] [2021-10-04 19:24:20,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:24:20,924 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:20,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:20,928 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) [2021-10-04 19:24:20,947 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 [2021-10-04 19:24:21,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-04 19:24:21,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:21,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-04 19:24:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:24:22,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731301845] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:22,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:22,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2021-10-04 19:24:22,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758391131] [2021-10-04 19:24:22,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 19:24:22,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:22,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 19:24:22,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-10-04 19:24:22,189 INFO L87 Difference]: Start difference. First operand 300 states and 805 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:22,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:22,740 INFO L93 Difference]: Finished difference Result 420 states and 1063 transitions. [2021-10-04 19:24:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 19:24:22,741 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-04 19:24:22,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:22,744 INFO L225 Difference]: With dead ends: 420 [2021-10-04 19:24:22,744 INFO L226 Difference]: Without dead ends: 381 [2021-10-04 19:24:22,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 617.1ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-10-04 19:24:22,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-10-04 19:24:22,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 287. [2021-10-04 19:24:22,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.7167832167832167) internal successors, (777), 286 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 777 transitions. [2021-10-04 19:24:22,760 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 777 transitions. Word has length 26 [2021-10-04 19:24:22,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:22,760 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 777 transitions. [2021-10-04 19:24:22,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:22,761 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 777 transitions. [2021-10-04 19:24:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-04 19:24:22,762 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:22,763 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:22,799 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 [2021-10-04 19:24:22,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:22,979 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:22,980 INFO L82 PathProgramCache]: Analyzing trace with hash 430459833, now seen corresponding path program 4 times [2021-10-04 19:24:22,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:22,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331677732] [2021-10-04 19:24:22,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:22,981 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:24:24,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:24,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331677732] [2021-10-04 19:24:24,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331677732] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:24,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358794711] [2021-10-04 19:24:24,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:24:24,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:24,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:24,200 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) [2021-10-04 19:24:24,210 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 [2021-10-04 19:24:24,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:24:24,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:24,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-04 19:24:24,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-04 19:24:25,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358794711] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:25,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:25,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 5] total 17 [2021-10-04 19:24:25,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116156664] [2021-10-04 19:24:25,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 19:24:25,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:25,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 19:24:25,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-04 19:24:25,091 INFO L87 Difference]: Start difference. First operand 287 states and 777 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:26,119 INFO L93 Difference]: Finished difference Result 374 states and 987 transitions. [2021-10-04 19:24:26,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 19:24:26,120 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-04 19:24:26,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:26,122 INFO L225 Difference]: With dead ends: 374 [2021-10-04 19:24:26,122 INFO L226 Difference]: Without dead ends: 287 [2021-10-04 19:24:26,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1144.1ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-10-04 19:24:26,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-04 19:24:26,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 183. [2021-10-04 19:24:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.7967032967032965) internal successors, (509), 182 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 509 transitions. [2021-10-04 19:24:26,131 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 509 transitions. Word has length 26 [2021-10-04 19:24:26,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:26,132 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 509 transitions. [2021-10-04 19:24:26,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:26,132 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 509 transitions. [2021-10-04 19:24:26,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-04 19:24:26,133 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:26,133 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:26,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-04 19:24:26,346 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,SelfDestructingSolverStorable16 [2021-10-04 19:24:26,347 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:26,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:26,348 INFO L82 PathProgramCache]: Analyzing trace with hash 345857121, now seen corresponding path program 1 times [2021-10-04 19:24:26,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:26,348 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293311268] [2021-10-04 19:24:26,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:26,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:24:26,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:26,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293311268] [2021-10-04 19:24:26,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293311268] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:26,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220965817] [2021-10-04 19:24:26,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:26,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:26,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:26,527 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) [2021-10-04 19:24:26,550 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 [2021-10-04 19:24:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:26,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-04 19:24:26,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:24:27,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220965817] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:27,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:27,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-10-04 19:24:27,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940858201] [2021-10-04 19:24:27,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-04 19:24:27,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:27,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-04 19:24:27,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-04 19:24:27,186 INFO L87 Difference]: Start difference. First operand 183 states and 509 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:27,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:27,335 INFO L93 Difference]: Finished difference Result 313 states and 788 transitions. [2021-10-04 19:24:27,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-04 19:24:27,336 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-04 19:24:27,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:27,338 INFO L225 Difference]: With dead ends: 313 [2021-10-04 19:24:27,338 INFO L226 Difference]: Without dead ends: 264 [2021-10-04 19:24:27,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-10-04 19:24:27,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-10-04 19:24:27,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 185. [2021-10-04 19:24:27,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.782608695652174) internal successors, (512), 184 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:27,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 512 transitions. [2021-10-04 19:24:27,346 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 512 transitions. Word has length 26 [2021-10-04 19:24:27,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:27,347 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 512 transitions. [2021-10-04 19:24:27,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:27,347 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 512 transitions. [2021-10-04 19:24:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-04 19:24:27,348 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:27,348 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:27,390 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 [2021-10-04 19:24:27,562 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,SelfDestructingSolverStorable17 [2021-10-04 19:24:27,563 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:27,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:27,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1161926592, now seen corresponding path program 5 times [2021-10-04 19:24:27,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:27,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624863759] [2021-10-04 19:24:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:27,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:24:28,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:28,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624863759] [2021-10-04 19:24:28,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624863759] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:28,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270464956] [2021-10-04 19:24:28,068 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:24:28,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:28,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:28,070 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) [2021-10-04 19:24:28,072 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 [2021-10-04 19:24:28,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-04 19:24:28,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:28,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-04 19:24:28,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:24:29,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270464956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:29,129 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:29,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2021-10-04 19:24:29,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266922110] [2021-10-04 19:24:29,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 19:24:29,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:29,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 19:24:29,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-10-04 19:24:29,132 INFO L87 Difference]: Start difference. First operand 185 states and 512 transitions. Second operand has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:29,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:29,975 INFO L93 Difference]: Finished difference Result 431 states and 1215 transitions. [2021-10-04 19:24:29,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-04 19:24:29,976 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-04 19:24:29,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:29,979 INFO L225 Difference]: With dead ends: 431 [2021-10-04 19:24:29,980 INFO L226 Difference]: Without dead ends: 407 [2021-10-04 19:24:29,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 790.6ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-10-04 19:24:29,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-10-04 19:24:29,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 273. [2021-10-04 19:24:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 3.073529411764706) internal successors, (836), 272 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 836 transitions. [2021-10-04 19:24:29,993 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 836 transitions. Word has length 27 [2021-10-04 19:24:29,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:29,993 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 836 transitions. [2021-10-04 19:24:29,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:29,994 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 836 transitions. [2021-10-04 19:24:29,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-04 19:24:29,995 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:29,996 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:30,031 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 [2021-10-04 19:24:30,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:30,210 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:30,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:30,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1160377676, now seen corresponding path program 2 times [2021-10-04 19:24:30,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:30,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459236306] [2021-10-04 19:24:30,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:30,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-04 19:24:30,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:30,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459236306] [2021-10-04 19:24:30,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459236306] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:30,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929984070] [2021-10-04 19:24:30,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:24:30,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:30,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:30,377 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) [2021-10-04 19:24:30,400 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 [2021-10-04 19:24:30,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:24:30,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:30,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-04 19:24:30,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:24:31,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929984070] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:31,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:31,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-10-04 19:24:31,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976788663] [2021-10-04 19:24:31,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-04 19:24:31,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:31,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-04 19:24:31,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-10-04 19:24:31,400 INFO L87 Difference]: Start difference. First operand 273 states and 836 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:31,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:31,548 INFO L93 Difference]: Finished difference Result 317 states and 809 transitions. [2021-10-04 19:24:31,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 19:24:31,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-04 19:24:31,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:31,552 INFO L225 Difference]: With dead ends: 317 [2021-10-04 19:24:31,552 INFO L226 Difference]: Without dead ends: 247 [2021-10-04 19:24:31,552 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-10-04 19:24:31,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-10-04 19:24:31,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 137. [2021-10-04 19:24:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.6838235294117645) internal successors, (365), 136 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:31,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 365 transitions. [2021-10-04 19:24:31,561 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 365 transitions. Word has length 27 [2021-10-04 19:24:31,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:31,561 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 365 transitions. [2021-10-04 19:24:31,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:31,562 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 365 transitions. [2021-10-04 19:24:31,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-04 19:24:31,563 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:31,563 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:31,598 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 [2021-10-04 19:24:31,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:31,777 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:31,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1340043017, now seen corresponding path program 6 times [2021-10-04 19:24:31,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:31,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277768415] [2021-10-04 19:24:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:31,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:31,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-04 19:24:31,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:31,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277768415] [2021-10-04 19:24:31,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277768415] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:31,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621410506] [2021-10-04 19:24:31,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:24:31,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:31,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:31,980 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) [2021-10-04 19:24:31,998 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 [2021-10-04 19:24:32,440 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-04 19:24:32,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:32,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-04 19:24:32,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:32,913 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:24:32,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621410506] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:32,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:32,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 15 [2021-10-04 19:24:32,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155894208] [2021-10-04 19:24:32,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 19:24:32,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:32,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 19:24:32,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-04 19:24:32,916 INFO L87 Difference]: Start difference. First operand 137 states and 365 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:33,513 INFO L93 Difference]: Finished difference Result 467 states and 1233 transitions. [2021-10-04 19:24:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-04 19:24:33,514 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-04 19:24:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:33,518 INFO L225 Difference]: With dead ends: 467 [2021-10-04 19:24:33,518 INFO L226 Difference]: Without dead ends: 419 [2021-10-04 19:24:33,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 482.4ms TimeCoverageRelationStatistics Valid=224, Invalid=768, Unknown=0, NotChecked=0, Total=992 [2021-10-04 19:24:33,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-10-04 19:24:33,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 217. [2021-10-04 19:24:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.8333333333333335) internal successors, (612), 216 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 612 transitions. [2021-10-04 19:24:33,532 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 612 transitions. Word has length 28 [2021-10-04 19:24:33,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:33,533 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 612 transitions. [2021-10-04 19:24:33,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:33,534 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 612 transitions. [2021-10-04 19:24:33,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-04 19:24:33,535 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:33,535 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:33,581 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 [2021-10-04 19:24:33,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-10-04 19:24:33,749 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:33,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:33,750 INFO L82 PathProgramCache]: Analyzing trace with hash -975345821, now seen corresponding path program 7 times [2021-10-04 19:24:33,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:33,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170034774] [2021-10-04 19:24:33,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:33,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:24:35,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:35,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170034774] [2021-10-04 19:24:35,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170034774] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:35,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808453577] [2021-10-04 19:24:35,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:24:35,169 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:35,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:35,170 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:24:35,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-04 19:24:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:35,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-04 19:24:35,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:36,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:24:36,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808453577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:36,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:36,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 24 [2021-10-04 19:24:36,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740755624] [2021-10-04 19:24:36,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-04 19:24:36,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:36,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-04 19:24:36,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-10-04 19:24:36,893 INFO L87 Difference]: Start difference. First operand 217 states and 612 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:39,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:39,290 INFO L93 Difference]: Finished difference Result 345 states and 851 transitions. [2021-10-04 19:24:39,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-04 19:24:39,290 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-04 19:24:39,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:39,293 INFO L225 Difference]: With dead ends: 345 [2021-10-04 19:24:39,293 INFO L226 Difference]: Without dead ends: 324 [2021-10-04 19:24:39,294 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 2700.6ms TimeCoverageRelationStatistics Valid=290, Invalid=2062, Unknown=0, NotChecked=0, Total=2352 [2021-10-04 19:24:39,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-10-04 19:24:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 229. [2021-10-04 19:24:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.807017543859649) internal successors, (640), 228 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:39,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 640 transitions. [2021-10-04 19:24:39,303 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 640 transitions. Word has length 28 [2021-10-04 19:24:39,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:39,304 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 640 transitions. [2021-10-04 19:24:39,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:39,304 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 640 transitions. [2021-10-04 19:24:39,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-04 19:24:39,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:39,305 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:39,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-10-04 19:24:39,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:39,519 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:39,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:39,519 INFO L82 PathProgramCache]: Analyzing trace with hash 513690784, now seen corresponding path program 8 times [2021-10-04 19:24:39,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:39,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243030577] [2021-10-04 19:24:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:39,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-04 19:24:39,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:39,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243030577] [2021-10-04 19:24:39,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243030577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:39,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916777824] [2021-10-04 19:24:39,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:24:39,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:39,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:39,654 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:24:39,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-04 19:24:40,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:24:40,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:40,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-04 19:24:40,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-04 19:24:40,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916777824] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:40,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:40,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-04 19:24:40,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701463808] [2021-10-04 19:24:40,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-04 19:24:40,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-04 19:24:40,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-10-04 19:24:40,790 INFO L87 Difference]: Start difference. First operand 229 states and 640 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-10-04 19:24:40,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:40,957 INFO L93 Difference]: Finished difference Result 362 states and 913 transitions. [2021-10-04 19:24:40,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-04 19:24:40,958 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 29 [2021-10-04 19:24:40,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:40,962 INFO L225 Difference]: With dead ends: 362 [2021-10-04 19:24:40,962 INFO L226 Difference]: Without dead ends: 323 [2021-10-04 19:24:40,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 209.8ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-04 19:24:40,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-10-04 19:24:40,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 271. [2021-10-04 19:24:40,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.696296296296296) internal successors, (728), 270 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 728 transitions. [2021-10-04 19:24:40,976 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 728 transitions. Word has length 29 [2021-10-04 19:24:40,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:40,976 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 728 transitions. [2021-10-04 19:24:40,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-10-04 19:24:40,977 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 728 transitions. [2021-10-04 19:24:40,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-04 19:24:40,978 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:40,978 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:41,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-04 19:24:41,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:41,194 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:41,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:41,195 INFO L82 PathProgramCache]: Analyzing trace with hash -916562500, now seen corresponding path program 9 times [2021-10-04 19:24:41,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:41,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263307251] [2021-10-04 19:24:41,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:41,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:41,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:24:41,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:41,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263307251] [2021-10-04 19:24:41,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263307251] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:41,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922811214] [2021-10-04 19:24:41,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:24:41,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:41,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:41,821 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:24:41,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-04 19:24:42,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-04 19:24:42,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:42,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-04 19:24:42,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:24:43,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922811214] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:43,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:43,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 17 [2021-10-04 19:24:43,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410288948] [2021-10-04 19:24:43,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 19:24:43,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:43,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 19:24:43,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-10-04 19:24:43,490 INFO L87 Difference]: Start difference. First operand 271 states and 728 transitions. Second operand has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:44,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:44,390 INFO L93 Difference]: Finished difference Result 460 states and 1135 transitions. [2021-10-04 19:24:44,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-04 19:24:44,391 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-04 19:24:44,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:44,395 INFO L225 Difference]: With dead ends: 460 [2021-10-04 19:24:44,395 INFO L226 Difference]: Without dead ends: 435 [2021-10-04 19:24:44,396 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1091.9ms TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2021-10-04 19:24:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-10-04 19:24:44,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 283. [2021-10-04 19:24:44,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.7375886524822697) internal successors, (772), 282 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:44,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 772 transitions. [2021-10-04 19:24:44,408 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 772 transitions. Word has length 29 [2021-10-04 19:24:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:44,409 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 772 transitions. [2021-10-04 19:24:44,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:44,409 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 772 transitions. [2021-10-04 19:24:44,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-04 19:24:44,410 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:44,411 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:44,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-04 19:24:44,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-04 19:24:44,625 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:44,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1971276539, now seen corresponding path program 10 times [2021-10-04 19:24:44,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:44,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197187824] [2021-10-04 19:24:44,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:44,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:44,843 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:24:44,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:44,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197187824] [2021-10-04 19:24:44,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197187824] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:44,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528910201] [2021-10-04 19:24:44,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:24:44,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:44,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:44,846 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:24:44,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-04 19:24:45,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:24:45,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:45,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-04 19:24:45,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:24:46,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528910201] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:46,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:46,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-04 19:24:46,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957749872] [2021-10-04 19:24:46,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-04 19:24:46,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:46,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-04 19:24:46,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-04 19:24:46,375 INFO L87 Difference]: Start difference. First operand 283 states and 772 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) 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) [2021-10-04 19:24:46,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:46,571 INFO L93 Difference]: Finished difference Result 333 states and 888 transitions. [2021-10-04 19:24:46,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-04 19:24:46,572 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) 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 30 [2021-10-04 19:24:46,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:46,578 INFO L225 Difference]: With dead ends: 333 [2021-10-04 19:24:46,579 INFO L226 Difference]: Without dead ends: 291 [2021-10-04 19:24:46,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 333.2ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-04 19:24:46,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-10-04 19:24:46,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 235. [2021-10-04 19:24:46,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.8290598290598292) internal successors, (662), 234 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:46,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 662 transitions. [2021-10-04 19:24:46,589 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 662 transitions. Word has length 30 [2021-10-04 19:24:46,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:46,590 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 662 transitions. [2021-10-04 19:24:46,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) 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) [2021-10-04 19:24:46,590 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 662 transitions. [2021-10-04 19:24:46,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-04 19:24:46,591 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:46,592 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:46,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-04 19:24:46,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-04 19:24:46,806 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:46,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1896740797, now seen corresponding path program 1 times [2021-10-04 19:24:46,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:46,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789598703] [2021-10-04 19:24:46,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:46,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:47,750 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:24:47,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:47,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789598703] [2021-10-04 19:24:47,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789598703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:47,751 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915453165] [2021-10-04 19:24:47,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:47,752 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:47,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:47,754 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:24:47,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-04 19:24:48,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:48,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-04 19:24:48,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:48,521 INFO L354 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2021-10-04 19:24:48,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 81 treesize of output 97 [2021-10-04 19:24:48,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2021-10-04 19:24:49,076 INFO L354 Elim1Store]: treesize reduction 146, result has 24.0 percent of original size [2021-10-04 19:24:49,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 50 treesize of output 82 [2021-10-04 19:24:49,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 54 [2021-10-04 19:24:49,630 INFO L354 Elim1Store]: treesize reduction 84, result has 42.1 percent of original size [2021-10-04 19:24:49,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 68 treesize of output 114 [2021-10-04 19:24:49,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2021-10-04 19:24:49,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-04 19:24:50,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-04 19:24:50,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-10-04 19:24:51,342 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:24:51,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915453165] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:51,343 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:51,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 30 [2021-10-04 19:24:51,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260780214] [2021-10-04 19:24:51,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-04 19:24:51,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:51,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-04 19:24:51,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-10-04 19:24:51,346 INFO L87 Difference]: Start difference. First operand 235 states and 662 transitions. Second operand has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:53,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:53,054 INFO L93 Difference]: Finished difference Result 406 states and 1059 transitions. [2021-10-04 19:24:53,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-04 19:24:53,056 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-04 19:24:53,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:53,060 INFO L225 Difference]: With dead ends: 406 [2021-10-04 19:24:53,060 INFO L226 Difference]: Without dead ends: 385 [2021-10-04 19:24:53,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 2469.5ms TimeCoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2021-10-04 19:24:53,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-10-04 19:24:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 377. [2021-10-04 19:24:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.622340425531915) internal successors, (986), 376 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 986 transitions. [2021-10-04 19:24:53,074 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 986 transitions. Word has length 30 [2021-10-04 19:24:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:53,075 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 986 transitions. [2021-10-04 19:24:53,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 986 transitions. [2021-10-04 19:24:53,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-04 19:24:53,077 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:53,077 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:53,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-04 19:24:53,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-04 19:24:53,292 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:53,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:53,292 INFO L82 PathProgramCache]: Analyzing trace with hash -966707980, now seen corresponding path program 2 times [2021-10-04 19:24:53,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:53,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884266417] [2021-10-04 19:24:53,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:53,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:53,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:24:54,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:54,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884266417] [2021-10-04 19:24:54,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884266417] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:54,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279740616] [2021-10-04 19:24:54,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:24:54,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:54,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:54,398 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:24:54,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-04 19:24:55,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:24:55,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:55,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-04 19:24:55,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:24:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:24:56,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279740616] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:56,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:24:56,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 27 [2021-10-04 19:24:56,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084561039] [2021-10-04 19:24:56,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-04 19:24:56,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:24:56,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-04 19:24:56,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2021-10-04 19:24:56,548 INFO L87 Difference]: Start difference. First operand 377 states and 986 transitions. Second operand has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:24:58,347 INFO L93 Difference]: Finished difference Result 546 states and 1357 transitions. [2021-10-04 19:24:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-04 19:24:58,348 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-04 19:24:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:24:58,352 INFO L225 Difference]: With dead ends: 546 [2021-10-04 19:24:58,353 INFO L226 Difference]: Without dead ends: 525 [2021-10-04 19:24:58,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2304.3ms TimeCoverageRelationStatistics Valid=295, Invalid=2155, Unknown=0, NotChecked=0, Total=2450 [2021-10-04 19:24:58,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-10-04 19:24:58,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 327. [2021-10-04 19:24:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.6993865030674846) internal successors, (880), 326 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:58,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 880 transitions. [2021-10-04 19:24:58,367 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 880 transitions. Word has length 31 [2021-10-04 19:24:58,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:24:58,368 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 880 transitions. [2021-10-04 19:24:58,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.142857142857143) internal successors, (60), 28 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:24:58,368 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 880 transitions. [2021-10-04 19:24:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-04 19:24:58,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:24:58,370 INFO L512 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:24:58,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-04 19:24:58,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-04 19:24:58,585 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:24:58,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:24:58,586 INFO L82 PathProgramCache]: Analyzing trace with hash -645937274, now seen corresponding path program 3 times [2021-10-04 19:24:58,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:24:58,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123313105] [2021-10-04 19:24:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:24:58,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:24:58,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:24:58,999 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-04 19:24:58,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:24:58,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123313105] [2021-10-04 19:24:58,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123313105] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:24:58,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719889839] [2021-10-04 19:24:58,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:24:59,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:24:59,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:24:59,002 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:24:59,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-04 19:24:59,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-04 19:24:59,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:24:59,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 19:24:59,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:25:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-04 19:25:01,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719889839] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:01,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:25:01,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-10-04 19:25:01,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757408723] [2021-10-04 19:25:01,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-04 19:25:01,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:25:01,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-04 19:25:01,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-10-04 19:25:01,208 INFO L87 Difference]: Start difference. First operand 327 states and 880 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:02,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:25:02,197 INFO L93 Difference]: Finished difference Result 461 states and 1119 transitions. [2021-10-04 19:25:02,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-04 19:25:02,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-04 19:25:02,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:25:02,200 INFO L225 Difference]: With dead ends: 461 [2021-10-04 19:25:02,200 INFO L226 Difference]: Without dead ends: 317 [2021-10-04 19:25:02,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1121.5ms TimeCoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2021-10-04 19:25:02,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-10-04 19:25:02,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 269. [2021-10-04 19:25:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.5186567164179103) internal successors, (675), 268 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:02,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 675 transitions. [2021-10-04 19:25:02,210 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 675 transitions. Word has length 31 [2021-10-04 19:25:02,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:25:02,211 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 675 transitions. [2021-10-04 19:25:02,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:02,211 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 675 transitions. [2021-10-04 19:25:02,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-04 19:25:02,212 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:25:02,213 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:25:02,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-04 19:25:02,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-04 19:25:02,427 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:25:02,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:25:02,428 INFO L82 PathProgramCache]: Analyzing trace with hash -606714989, now seen corresponding path program 4 times [2021-10-04 19:25:02,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:25:02,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830549178] [2021-10-04 19:25:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:25:02,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:25:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:25:03,938 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:25:03,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:25:03,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830549178] [2021-10-04 19:25:03,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830549178] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:03,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423628965] [2021-10-04 19:25:03,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:25:03,940 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:03,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:25:03,940 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:25:03,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-04 19:25:04,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:25:04,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:25:04,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-04 19:25:04,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:25:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-04 19:25:06,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423628965] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:06,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:25:06,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 26 [2021-10-04 19:25:06,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322692795] [2021-10-04 19:25:06,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-04 19:25:06,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:25:06,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-04 19:25:06,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-10-04 19:25:06,153 INFO L87 Difference]: Start difference. First operand 269 states and 675 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:25:09,026 INFO L93 Difference]: Finished difference Result 441 states and 1011 transitions. [2021-10-04 19:25:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-04 19:25:09,026 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-04 19:25:09,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:25:09,029 INFO L225 Difference]: With dead ends: 441 [2021-10-04 19:25:09,029 INFO L226 Difference]: Without dead ends: 420 [2021-10-04 19:25:09,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 2796.6ms TimeCoverageRelationStatistics Valid=235, Invalid=2215, Unknown=0, NotChecked=0, Total=2450 [2021-10-04 19:25:09,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-10-04 19:25:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 275. [2021-10-04 19:25:09,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.5364963503649633) internal successors, (695), 274 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 695 transitions. [2021-10-04 19:25:09,039 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 695 transitions. Word has length 32 [2021-10-04 19:25:09,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:25:09,040 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 695 transitions. [2021-10-04 19:25:09,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:09,040 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 695 transitions. [2021-10-04 19:25:09,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-04 19:25:09,041 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:25:09,042 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:25:09,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-04 19:25:09,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-04 19:25:09,257 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:25:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:25:09,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1713257765, now seen corresponding path program 5 times [2021-10-04 19:25:09,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:25:09,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340024587] [2021-10-04 19:25:09,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:25:09,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:25:09,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:25:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-04 19:25:10,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:25:10,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340024587] [2021-10-04 19:25:10,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340024587] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:10,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787649671] [2021-10-04 19:25:10,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:25:10,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:10,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:25:10,036 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:25:10,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-04 19:25:10,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-04 19:25:10,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:25:10,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-04 19:25:10,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:25:13,137 INFO L354 Elim1Store]: treesize reduction 39, result has 38.1 percent of original size [2021-10-04 19:25:13,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 76 [2021-10-04 19:25:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:25:13,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787649671] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:13,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:25:13,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 27 [2021-10-04 19:25:13,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980061153] [2021-10-04 19:25:13,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-04 19:25:13,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:25:13,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-04 19:25:13,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-10-04 19:25:13,194 INFO L87 Difference]: Start difference. First operand 275 states and 695 transitions. Second operand has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:14,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:25:14,726 INFO L93 Difference]: Finished difference Result 382 states and 924 transitions. [2021-10-04 19:25:14,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-04 19:25:14,727 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-04 19:25:14,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:25:14,730 INFO L225 Difference]: With dead ends: 382 [2021-10-04 19:25:14,730 INFO L226 Difference]: Without dead ends: 367 [2021-10-04 19:25:14,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 2174.8ms TimeCoverageRelationStatistics Valid=239, Invalid=1831, Unknown=0, NotChecked=0, Total=2070 [2021-10-04 19:25:14,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-10-04 19:25:14,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 349. [2021-10-04 19:25:14,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.410919540229885) internal successors, (839), 348 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:14,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 839 transitions. [2021-10-04 19:25:14,746 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 839 transitions. Word has length 32 [2021-10-04 19:25:14,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:25:14,746 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 839 transitions. [2021-10-04 19:25:14,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:14,747 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 839 transitions. [2021-10-04 19:25:14,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-04 19:25:14,748 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:25:14,749 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:25:14,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-04 19:25:14,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:14,963 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:25:14,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:25:14,964 INFO L82 PathProgramCache]: Analyzing trace with hash -943655312, now seen corresponding path program 6 times [2021-10-04 19:25:14,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:25:14,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029102917] [2021-10-04 19:25:14,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:25:14,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:25:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:25:15,271 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-04 19:25:15,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:25:15,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029102917] [2021-10-04 19:25:15,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029102917] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:15,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907600160] [2021-10-04 19:25:15,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:25:15,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:15,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:25:15,276 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:25:15,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-04 19:25:16,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-04 19:25:16,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:25:16,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-04 19:25:16,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:25:17,635 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-04 19:25:17,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907600160] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:17,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:25:17,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-04 19:25:17,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093105529] [2021-10-04 19:25:17,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-04 19:25:17,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:25:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-04 19:25:17,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-10-04 19:25:17,637 INFO L87 Difference]: Start difference. First operand 349 states and 839 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) 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) [2021-10-04 19:25:17,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:25:17,834 INFO L93 Difference]: Finished difference Result 353 states and 829 transitions. [2021-10-04 19:25:17,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-04 19:25:17,834 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) 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 33 [2021-10-04 19:25:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:25:17,836 INFO L225 Difference]: With dead ends: 353 [2021-10-04 19:25:17,836 INFO L226 Difference]: Without dead ends: 303 [2021-10-04 19:25:17,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 438.1ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-10-04 19:25:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-10-04 19:25:17,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 261. [2021-10-04 19:25:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.4153846153846152) internal successors, (628), 260 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 628 transitions. [2021-10-04 19:25:17,845 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 628 transitions. Word has length 33 [2021-10-04 19:25:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:25:17,845 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 628 transitions. [2021-10-04 19:25:17,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) 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) [2021-10-04 19:25:17,845 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 628 transitions. [2021-10-04 19:25:17,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-04 19:25:17,847 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:25:17,847 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:25:17,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-04 19:25:18,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:18,062 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:25:18,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:25:18,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1645916960, now seen corresponding path program 7 times [2021-10-04 19:25:18,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:25:18,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774932109] [2021-10-04 19:25:18,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:25:18,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:25:18,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:25:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-04 19:25:18,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:25:18,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774932109] [2021-10-04 19:25:18,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774932109] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:18,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370874741] [2021-10-04 19:25:18,265 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:25:18,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:18,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:25:18,266 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:25:18,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-04 19:25:19,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:25:19,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-04 19:25:19,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:25:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:25:20,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370874741] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:20,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:25:20,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-10-04 19:25:20,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845776445] [2021-10-04 19:25:20,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-04 19:25:20,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:25:20,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-04 19:25:20,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-10-04 19:25:20,157 INFO L87 Difference]: Start difference. First operand 261 states and 628 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:20,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:25:20,511 INFO L93 Difference]: Finished difference Result 413 states and 954 transitions. [2021-10-04 19:25:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-04 19:25:20,512 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-04 19:25:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:25:20,514 INFO L225 Difference]: With dead ends: 413 [2021-10-04 19:25:20,514 INFO L226 Difference]: Without dead ends: 362 [2021-10-04 19:25:20,515 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 496.2ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-10-04 19:25:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-10-04 19:25:20,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 292. [2021-10-04 19:25:20,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.443298969072165) internal successors, (711), 291 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:20,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 711 transitions. [2021-10-04 19:25:20,525 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 711 transitions. Word has length 33 [2021-10-04 19:25:20,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:25:20,525 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 711 transitions. [2021-10-04 19:25:20,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:20,525 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 711 transitions. [2021-10-04 19:25:20,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-04 19:25:20,527 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:25:20,527 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:25:20,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-04 19:25:20,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-04 19:25:20,731 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:25:20,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:25:20,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1028723586, now seen corresponding path program 8 times [2021-10-04 19:25:20,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:25:20,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986866583] [2021-10-04 19:25:20,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:25:20,733 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:25:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:25:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-04 19:25:21,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:25:21,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986866583] [2021-10-04 19:25:21,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986866583] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:21,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112732403] [2021-10-04 19:25:21,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:25:21,648 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:21,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:25:21,650 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:25:21,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-04 19:25:22,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:25:22,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:25:22,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-04 19:25:22,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:25:24,391 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-04 19:25:24,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112732403] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:24,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:25:24,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 24 [2021-10-04 19:25:24,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545318187] [2021-10-04 19:25:24,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-04 19:25:24,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:25:24,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-04 19:25:24,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-10-04 19:25:24,394 INFO L87 Difference]: Start difference. First operand 292 states and 711 transitions. Second operand has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:26,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:25:26,202 INFO L93 Difference]: Finished difference Result 429 states and 1002 transitions. [2021-10-04 19:25:26,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-04 19:25:26,203 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-04 19:25:26,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:25:26,205 INFO L225 Difference]: With dead ends: 429 [2021-10-04 19:25:26,205 INFO L226 Difference]: Without dead ends: 398 [2021-10-04 19:25:26,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 2052.0ms TimeCoverageRelationStatistics Valid=290, Invalid=1966, Unknown=0, NotChecked=0, Total=2256 [2021-10-04 19:25:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-10-04 19:25:26,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 350. [2021-10-04 19:25:26,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 349 states have (on average 2.361031518624642) internal successors, (824), 349 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 824 transitions. [2021-10-04 19:25:26,216 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 824 transitions. Word has length 33 [2021-10-04 19:25:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:25:26,216 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 824 transitions. [2021-10-04 19:25:26,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:26,217 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 824 transitions. [2021-10-04 19:25:26,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-04 19:25:26,218 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:25:26,218 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:25:26,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-04 19:25:26,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-04 19:25:26,419 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:25:26,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:25:26,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1760042776, now seen corresponding path program 9 times [2021-10-04 19:25:26,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:25:26,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578503713] [2021-10-04 19:25:26,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:25:26,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:25:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:25:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:25:28,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:25:28,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578503713] [2021-10-04 19:25:28,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578503713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:28,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824452238] [2021-10-04 19:25:28,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:25:28,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:28,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:25:28,882 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:25:28,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-04 19:25:30,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-04 19:25:30,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:25:30,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-04 19:25:30,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:25:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-04 19:25:31,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824452238] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:31,779 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:25:31,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 26 [2021-10-04 19:25:31,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803951512] [2021-10-04 19:25:31,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-04 19:25:31,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:25:31,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-04 19:25:31,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2021-10-04 19:25:31,782 INFO L87 Difference]: Start difference. First operand 350 states and 824 transitions. Second operand has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:35,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:25:35,166 INFO L93 Difference]: Finished difference Result 485 states and 1104 transitions. [2021-10-04 19:25:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-04 19:25:35,167 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-04 19:25:35,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:25:35,169 INFO L225 Difference]: With dead ends: 485 [2021-10-04 19:25:35,169 INFO L226 Difference]: Without dead ends: 382 [2021-10-04 19:25:35,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 3560.1ms TimeCoverageRelationStatistics Valid=276, Invalid=2274, Unknown=0, NotChecked=0, Total=2550 [2021-10-04 19:25:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-10-04 19:25:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 216. [2021-10-04 19:25:35,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.6372093023255814) internal successors, (567), 215 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:35,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 567 transitions. [2021-10-04 19:25:35,177 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 567 transitions. Word has length 33 [2021-10-04 19:25:35,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:25:35,178 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 567 transitions. [2021-10-04 19:25:35,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 27 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 567 transitions. [2021-10-04 19:25:35,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-04 19:25:35,179 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:25:35,180 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:25:35,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-04 19:25:35,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:35,394 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:25:35,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:25:35,395 INFO L82 PathProgramCache]: Analyzing trace with hash -7999415, now seen corresponding path program 10 times [2021-10-04 19:25:35,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:25:35,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256630019] [2021-10-04 19:25:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:25:35,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:25:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:25:36,182 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-04 19:25:36,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:25:36,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256630019] [2021-10-04 19:25:36,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256630019] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:36,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760448270] [2021-10-04 19:25:36,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:25:36,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:36,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:25:36,185 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:25:36,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-04 19:25:37,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:25:37,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:25:37,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-04 19:25:37,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:25:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:25:39,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760448270] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:39,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:25:39,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 27 [2021-10-04 19:25:39,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548437204] [2021-10-04 19:25:39,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-04 19:25:39,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:25:39,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-04 19:25:39,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-10-04 19:25:39,679 INFO L87 Difference]: Start difference. First operand 216 states and 567 transitions. Second operand has 29 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:25:41,773 INFO L93 Difference]: Finished difference Result 456 states and 1125 transitions. [2021-10-04 19:25:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-04 19:25:41,774 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-04 19:25:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:25:41,777 INFO L225 Difference]: With dead ends: 456 [2021-10-04 19:25:41,777 INFO L226 Difference]: Without dead ends: 423 [2021-10-04 19:25:41,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 2495.0ms TimeCoverageRelationStatistics Valid=324, Invalid=2226, Unknown=0, NotChecked=0, Total=2550 [2021-10-04 19:25:41,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-10-04 19:25:41,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 318. [2021-10-04 19:25:41,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.545741324921136) internal successors, (807), 317 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:41,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 807 transitions. [2021-10-04 19:25:41,786 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 807 transitions. Word has length 34 [2021-10-04 19:25:41,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:25:41,787 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 807 transitions. [2021-10-04 19:25:41,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 807 transitions. [2021-10-04 19:25:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-04 19:25:41,788 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:25:41,789 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:25:41,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-04 19:25:41,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-04 19:25:41,990 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:25:41,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:25:41,991 INFO L82 PathProgramCache]: Analyzing trace with hash -401026425, now seen corresponding path program 11 times [2021-10-04 19:25:41,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:25:41,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027287738] [2021-10-04 19:25:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:25:41,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:25:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:25:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-04 19:25:42,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:25:42,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027287738] [2021-10-04 19:25:42,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027287738] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:42,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65692510] [2021-10-04 19:25:42,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:25:42,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:42,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:25:42,427 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:25:42,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-04 19:25:43,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-04 19:25:43,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:25:43,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-04 19:25:43,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:25:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:25:46,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65692510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:46,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:25:46,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 25 [2021-10-04 19:25:46,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48439923] [2021-10-04 19:25:46,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-04 19:25:46,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:25:46,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-04 19:25:46,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-10-04 19:25:46,014 INFO L87 Difference]: Start difference. First operand 318 states and 807 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:47,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:25:47,209 INFO L93 Difference]: Finished difference Result 388 states and 943 transitions. [2021-10-04 19:25:47,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-04 19:25:47,213 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-04 19:25:47,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:25:47,215 INFO L225 Difference]: With dead ends: 388 [2021-10-04 19:25:47,215 INFO L226 Difference]: Without dead ends: 343 [2021-10-04 19:25:47,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1487.4ms TimeCoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2021-10-04 19:25:47,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-10-04 19:25:47,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 275. [2021-10-04 19:25:47,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.591240875912409) internal successors, (710), 274 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:47,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 710 transitions. [2021-10-04 19:25:47,224 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 710 transitions. Word has length 34 [2021-10-04 19:25:47,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:25:47,225 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 710 transitions. [2021-10-04 19:25:47,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:47,225 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 710 transitions. [2021-10-04 19:25:47,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:25:47,226 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:25:47,227 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:25:47,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-04 19:25:47,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:47,441 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:25:47,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:25:47,441 INFO L82 PathProgramCache]: Analyzing trace with hash 436658298, now seen corresponding path program 12 times [2021-10-04 19:25:47,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:25:47,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819349357] [2021-10-04 19:25:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:25:47,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:25:47,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:25:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:25:48,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:25:48,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819349357] [2021-10-04 19:25:48,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819349357] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:48,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291119596] [2021-10-04 19:25:48,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:25:48,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:48,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:25:48,555 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:25:48,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-04 19:25:49,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-10-04 19:25:49,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:25:49,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-04 19:25:49,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:25:52,949 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-04 19:25:52,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291119596] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:52,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:25:52,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 38 [2021-10-04 19:25:52,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856714224] [2021-10-04 19:25:52,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-04 19:25:52,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:25:52,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-04 19:25:52,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2021-10-04 19:25:52,952 INFO L87 Difference]: Start difference. First operand 275 states and 710 transitions. Second operand has 40 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:56,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:25:56,622 INFO L93 Difference]: Finished difference Result 758 states and 2057 transitions. [2021-10-04 19:25:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-04 19:25:56,623 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-04 19:25:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:25:56,630 INFO L225 Difference]: With dead ends: 758 [2021-10-04 19:25:56,630 INFO L226 Difference]: Without dead ends: 693 [2021-10-04 19:25:56,632 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 4122.4ms TimeCoverageRelationStatistics Valid=319, Invalid=3713, Unknown=0, NotChecked=0, Total=4032 [2021-10-04 19:25:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2021-10-04 19:25:56,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 474. [2021-10-04 19:25:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.758985200845666) internal successors, (1305), 473 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1305 transitions. [2021-10-04 19:25:56,648 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1305 transitions. Word has length 35 [2021-10-04 19:25:56,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:25:56,649 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1305 transitions. [2021-10-04 19:25:56,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:25:56,649 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1305 transitions. [2021-10-04 19:25:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-04 19:25:56,650 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:25:56,650 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:25:56,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-04 19:25:56,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:56,851 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:25:56,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:25:56,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1586752308, now seen corresponding path program 13 times [2021-10-04 19:25:56,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:25:56,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435091305] [2021-10-04 19:25:56,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:25:56,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:25:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:25:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:25:59,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:25:59,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435091305] [2021-10-04 19:25:59,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435091305] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:25:59,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286432559] [2021-10-04 19:25:59,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:25:59,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:25:59,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:25:59,514 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:25:59,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-04 19:26:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:26:00,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-04 19:26:00,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:26:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-04 19:26:02,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286432559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:02,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:26:02,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 29 [2021-10-04 19:26:02,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384661768] [2021-10-04 19:26:02,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-04 19:26:02,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:26:02,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-04 19:26:02,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-10-04 19:26:02,865 INFO L87 Difference]: Start difference. First operand 474 states and 1305 transitions. Second operand has 31 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:26:05,493 INFO L93 Difference]: Finished difference Result 729 states and 1868 transitions. [2021-10-04 19:26:05,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-04 19:26:05,493 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-10-04 19:26:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:26:05,499 INFO L225 Difference]: With dead ends: 729 [2021-10-04 19:26:05,499 INFO L226 Difference]: Without dead ends: 718 [2021-10-04 19:26:05,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 3524.7ms TimeCoverageRelationStatistics Valid=295, Invalid=2461, Unknown=0, NotChecked=0, Total=2756 [2021-10-04 19:26:05,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-10-04 19:26:05,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 442. [2021-10-04 19:26:05,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.795918367346939) internal successors, (1233), 441 states have internal predecessors, (1233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:05,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1233 transitions. [2021-10-04 19:26:05,514 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1233 transitions. Word has length 35 [2021-10-04 19:26:05,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:26:05,514 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1233 transitions. [2021-10-04 19:26:05,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2) internal successors, (66), 30 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:05,515 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1233 transitions. [2021-10-04 19:26:05,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-04 19:26:05,517 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:26:05,517 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:26:05,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-04 19:26:05,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-04 19:26:05,722 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:26:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:26:05,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1777578589, now seen corresponding path program 14 times [2021-10-04 19:26:05,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:26:05,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96054336] [2021-10-04 19:26:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:26:05,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:26:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:26:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-04 19:26:07,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:26:07,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96054336] [2021-10-04 19:26:07,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96054336] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:07,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014868387] [2021-10-04 19:26:07,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:26:07,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:26:07,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:26:07,367 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:26:07,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-04 19:26:08,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:26:08,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:26:08,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-04 19:26:08,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:26:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:26:11,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014868387] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:11,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:26:11,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 36 [2021-10-04 19:26:11,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457115072] [2021-10-04 19:26:11,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-04 19:26:11,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:26:11,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-04 19:26:11,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-10-04 19:26:11,747 INFO L87 Difference]: Start difference. First operand 442 states and 1233 transitions. Second operand has 38 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:18,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:26:18,829 INFO L93 Difference]: Finished difference Result 859 states and 2248 transitions. [2021-10-04 19:26:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-04 19:26:18,830 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-04 19:26:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:26:18,836 INFO L225 Difference]: With dead ends: 859 [2021-10-04 19:26:18,836 INFO L226 Difference]: Without dead ends: 852 [2021-10-04 19:26:18,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 6549.6ms TimeCoverageRelationStatistics Valid=577, Invalid=5743, Unknown=0, NotChecked=0, Total=6320 [2021-10-04 19:26:18,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-10-04 19:26:18,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 567. [2021-10-04 19:26:18,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.7031802120141344) internal successors, (1530), 566 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:18,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1530 transitions. [2021-10-04 19:26:18,853 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1530 transitions. Word has length 36 [2021-10-04 19:26:18,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:26:18,853 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 1530 transitions. [2021-10-04 19:26:18,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 37 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:18,854 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1530 transitions. [2021-10-04 19:26:18,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-04 19:26:18,856 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:26:18,856 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:26:18,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-04 19:26:19,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-04 19:26:19,072 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:26:19,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:26:19,072 INFO L82 PathProgramCache]: Analyzing trace with hash 971448317, now seen corresponding path program 15 times [2021-10-04 19:26:19,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:26:19,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492216872] [2021-10-04 19:26:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:26:19,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:26:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:26:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-04 19:26:19,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:26:19,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492216872] [2021-10-04 19:26:19,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492216872] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:19,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052126138] [2021-10-04 19:26:19,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:26:19,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:26:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:26:19,396 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:26:19,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-04 19:26:21,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-10-04 19:26:21,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:26:21,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-04 19:26:21,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:26:21,701 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-04 19:26:21,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052126138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:21,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:26:21,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2021-10-04 19:26:21,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723977810] [2021-10-04 19:26:21,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-04 19:26:21,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:26:21,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-04 19:26:21,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-10-04 19:26:21,704 INFO L87 Difference]: Start difference. First operand 567 states and 1530 transitions. Second operand has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:22,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:26:22,237 INFO L93 Difference]: Finished difference Result 625 states and 1562 transitions. [2021-10-04 19:26:22,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 19:26:22,238 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-04 19:26:22,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:26:22,241 INFO L225 Difference]: With dead ends: 625 [2021-10-04 19:26:22,241 INFO L226 Difference]: Without dead ends: 621 [2021-10-04 19:26:22,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2021-10-04 19:26:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-10-04 19:26:22,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 501. [2021-10-04 19:26:22,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.444) internal successors, (1222), 500 states have internal predecessors, (1222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1222 transitions. [2021-10-04 19:26:22,258 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1222 transitions. Word has length 36 [2021-10-04 19:26:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:26:22,258 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1222 transitions. [2021-10-04 19:26:22,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.65) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1222 transitions. [2021-10-04 19:26:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-04 19:26:22,260 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:26:22,261 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:26:22,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-04 19:26:22,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-04 19:26:22,475 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:26:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:26:22,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1729172523, now seen corresponding path program 16 times [2021-10-04 19:26:22,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:26:22,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743420137] [2021-10-04 19:26:22,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:26:22,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:26:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:26:22,773 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-04 19:26:22,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:26:22,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743420137] [2021-10-04 19:26:22,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743420137] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:22,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177494233] [2021-10-04 19:26:22,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:26:22,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:26:22,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:26:22,776 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:26:22,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-04 19:26:24,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:26:24,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:26:24,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-04 19:26:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:26:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-04 19:26:25,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177494233] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:25,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:26:25,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-04 19:26:25,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082146052] [2021-10-04 19:26:25,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-04 19:26:25,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:26:25,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-04 19:26:25,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-04 19:26:25,036 INFO L87 Difference]: Start difference. First operand 501 states and 1222 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:25,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:26:25,260 INFO L93 Difference]: Finished difference Result 709 states and 1682 transitions. [2021-10-04 19:26:25,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-04 19:26:25,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-04 19:26:25,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:26:25,267 INFO L225 Difference]: With dead ends: 709 [2021-10-04 19:26:25,267 INFO L226 Difference]: Without dead ends: 649 [2021-10-04 19:26:25,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-10-04 19:26:25,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2021-10-04 19:26:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 518. [2021-10-04 19:26:25,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 2.382978723404255) internal successors, (1232), 517 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1232 transitions. [2021-10-04 19:26:25,279 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1232 transitions. Word has length 36 [2021-10-04 19:26:25,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:26:25,280 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 1232 transitions. [2021-10-04 19:26:25,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1232 transitions. [2021-10-04 19:26:25,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-04 19:26:25,282 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:26:25,282 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:26:25,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-04 19:26:25,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:26:25,496 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:26:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:26:25,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1052426501, now seen corresponding path program 17 times [2021-10-04 19:26:25,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:26:25,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867482597] [2021-10-04 19:26:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:26:25,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:26:25,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:26:26,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:26:26,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:26:26,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867482597] [2021-10-04 19:26:26,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867482597] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:26,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480741717] [2021-10-04 19:26:26,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:26:26,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:26:26,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:26:26,512 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:26:26,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-04 19:26:28,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-10-04 19:26:28,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:26:28,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-04 19:26:28,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:26:31,421 INFO L354 Elim1Store]: treesize reduction 243, result has 40.9 percent of original size [2021-10-04 19:26:31,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 185 treesize of output 234 [2021-10-04 19:26:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:26:31,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480741717] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:31,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:26:31,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 31 [2021-10-04 19:26:31,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298469160] [2021-10-04 19:26:31,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-04 19:26:31,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:26:31,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-04 19:26:31,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2021-10-04 19:26:31,504 INFO L87 Difference]: Start difference. First operand 518 states and 1232 transitions. Second operand has 33 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:34,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:26:34,493 INFO L93 Difference]: Finished difference Result 738 states and 1756 transitions. [2021-10-04 19:26:34,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-04 19:26:34,494 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-04 19:26:34,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:26:34,499 INFO L225 Difference]: With dead ends: 738 [2021-10-04 19:26:34,499 INFO L226 Difference]: Without dead ends: 634 [2021-10-04 19:26:34,500 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3715.2ms TimeCoverageRelationStatistics Valid=193, Invalid=2257, Unknown=0, NotChecked=0, Total=2450 [2021-10-04 19:26:34,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-10-04 19:26:34,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 524. [2021-10-04 19:26:34,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 2.332695984703633) internal successors, (1220), 523 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:34,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 1220 transitions. [2021-10-04 19:26:34,513 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 1220 transitions. Word has length 36 [2021-10-04 19:26:34,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:26:34,513 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 1220 transitions. [2021-10-04 19:26:34,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:34,514 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 1220 transitions. [2021-10-04 19:26:34,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-04 19:26:34,516 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:26:34,516 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:26:34,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-04 19:26:34,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:26:34,730 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:26:34,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:26:34,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1414278752, now seen corresponding path program 18 times [2021-10-04 19:26:34,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:26:34,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600926448] [2021-10-04 19:26:34,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:26:34,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:26:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:26:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-04 19:26:34,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:26:34,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600926448] [2021-10-04 19:26:34,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600926448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:34,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546653632] [2021-10-04 19:26:34,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:26:34,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:26:34,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:26:34,988 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:26:34,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-04 19:26:36,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-10-04 19:26:36,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:26:36,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 19:26:36,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:26:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-04 19:26:38,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546653632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:38,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:26:38,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-10-04 19:26:38,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062594508] [2021-10-04 19:26:38,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-04 19:26:38,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:26:38,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-04 19:26:38,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-10-04 19:26:38,165 INFO L87 Difference]: Start difference. First operand 524 states and 1220 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:38,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:26:38,654 INFO L93 Difference]: Finished difference Result 724 states and 1664 transitions. [2021-10-04 19:26:38,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-04 19:26:38,654 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-04 19:26:38,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:26:38,659 INFO L225 Difference]: With dead ends: 724 [2021-10-04 19:26:38,659 INFO L226 Difference]: Without dead ends: 626 [2021-10-04 19:26:38,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 691.3ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-10-04 19:26:38,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-10-04 19:26:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 470. [2021-10-04 19:26:38,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.3475479744136463) internal successors, (1101), 469 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1101 transitions. [2021-10-04 19:26:38,672 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1101 transitions. Word has length 37 [2021-10-04 19:26:38,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:26:38,672 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 1101 transitions. [2021-10-04 19:26:38,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:38,673 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1101 transitions. [2021-10-04 19:26:38,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-04 19:26:38,674 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:26:38,675 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:26:38,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-04 19:26:38,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:26:38,890 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:26:38,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:26:38,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1194485592, now seen corresponding path program 19 times [2021-10-04 19:26:38,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:26:38,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114453390] [2021-10-04 19:26:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:26:38,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:26:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:26:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-04 19:26:39,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:26:39,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114453390] [2021-10-04 19:26:39,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114453390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:39,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131294452] [2021-10-04 19:26:39,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:26:39,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:26:39,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:26:39,148 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:26:39,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-04 19:26:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:26:40,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-04 19:26:40,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:26:42,631 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-04 19:26:42,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131294452] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:42,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:26:42,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-10-04 19:26:42,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882692423] [2021-10-04 19:26:42,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-04 19:26:42,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:26:42,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-04 19:26:42,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-10-04 19:26:42,633 INFO L87 Difference]: Start difference. First operand 470 states and 1101 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:42,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:26:42,954 INFO L93 Difference]: Finished difference Result 570 states and 1310 transitions. [2021-10-04 19:26:42,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-04 19:26:42,955 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-04 19:26:42,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:26:42,958 INFO L225 Difference]: With dead ends: 570 [2021-10-04 19:26:42,958 INFO L226 Difference]: Without dead ends: 540 [2021-10-04 19:26:42,958 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 481.2ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-10-04 19:26:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-10-04 19:26:42,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 344. [2021-10-04 19:26:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.3965014577259476) internal successors, (822), 343 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 822 transitions. [2021-10-04 19:26:42,968 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 822 transitions. Word has length 37 [2021-10-04 19:26:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:26:42,969 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 822 transitions. [2021-10-04 19:26:42,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 822 transitions. [2021-10-04 19:26:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-04 19:26:42,970 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:26:42,970 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:26:43,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-04 19:26:43,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:26:43,187 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:26:43,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:26:43,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1414573870, now seen corresponding path program 20 times [2021-10-04 19:26:43,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:26:43,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097299098] [2021-10-04 19:26:43,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:26:43,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:26:43,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:26:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-04 19:26:43,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:26:43,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097299098] [2021-10-04 19:26:43,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097299098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:43,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366662862] [2021-10-04 19:26:43,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:26:43,714 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:26:43,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:26:43,715 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:26:43,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-04 19:26:45,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:26:45,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:26:45,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-04 19:26:45,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:26:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-04 19:26:47,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366662862] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:47,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:26:47,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2021-10-04 19:26:47,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428800899] [2021-10-04 19:26:47,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-04 19:26:47,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:26:47,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-04 19:26:47,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-10-04 19:26:47,485 INFO L87 Difference]: Start difference. First operand 344 states and 822 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:48,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:26:48,935 INFO L93 Difference]: Finished difference Result 712 states and 1840 transitions. [2021-10-04 19:26:48,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-04 19:26:48,936 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-04 19:26:48,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:26:48,940 INFO L225 Difference]: With dead ends: 712 [2021-10-04 19:26:48,941 INFO L226 Difference]: Without dead ends: 662 [2021-10-04 19:26:48,941 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1481.8ms TimeCoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2021-10-04 19:26:48,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-10-04 19:26:48,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 410. [2021-10-04 19:26:48,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.6968215158924207) internal successors, (1103), 409 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1103 transitions. [2021-10-04 19:26:48,955 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1103 transitions. Word has length 37 [2021-10-04 19:26:48,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:26:48,955 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1103 transitions. [2021-10-04 19:26:48,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:48,956 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1103 transitions. [2021-10-04 19:26:48,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-04 19:26:48,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:26:48,957 INFO L512 BasicCegarLoop]: trace histogram [6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:26:49,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-04 19:26:49,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:26:49,171 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:26:49,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:26:49,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1049876674, now seen corresponding path program 21 times [2021-10-04 19:26:49,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:26:49,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983682170] [2021-10-04 19:26:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:26:49,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:26:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:26:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:26:50,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:26:50,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983682170] [2021-10-04 19:26:50,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983682170] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:50,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014933471] [2021-10-04 19:26:50,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:26:50,683 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:26:50,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:26:50,684 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:26:50,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-04 19:26:52,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-04 19:26:52,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:26:52,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-04 19:26:52,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:26:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-04 19:26:55,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014933471] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:55,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:26:55,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 35 [2021-10-04 19:26:55,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750086247] [2021-10-04 19:26:55,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-04 19:26:55,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:26:55,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-04 19:26:55,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2021-10-04 19:26:55,551 INFO L87 Difference]: Start difference. First operand 410 states and 1103 transitions. Second operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:59,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:26:59,244 INFO L93 Difference]: Finished difference Result 659 states and 1638 transitions. [2021-10-04 19:26:59,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-04 19:26:59,245 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-04 19:26:59,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:26:59,248 INFO L225 Difference]: With dead ends: 659 [2021-10-04 19:26:59,248 INFO L226 Difference]: Without dead ends: 617 [2021-10-04 19:26:59,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 4341.5ms TimeCoverageRelationStatistics Valid=328, Invalid=3454, Unknown=0, NotChecked=0, Total=3782 [2021-10-04 19:26:59,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-10-04 19:26:59,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 336. [2021-10-04 19:26:59,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.9313432835820894) internal successors, (982), 335 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 982 transitions. [2021-10-04 19:26:59,259 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 982 transitions. Word has length 37 [2021-10-04 19:26:59,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:26:59,259 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 982 transitions. [2021-10-04 19:26:59,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:26:59,260 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 982 transitions. [2021-10-04 19:26:59,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-04 19:26:59,261 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:26:59,261 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:26:59,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-04 19:26:59,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-04 19:26:59,476 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:26:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:26:59,477 INFO L82 PathProgramCache]: Analyzing trace with hash 982253654, now seen corresponding path program 22 times [2021-10-04 19:26:59,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:26:59,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543801626] [2021-10-04 19:26:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:26:59,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:26:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:26:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-04 19:26:59,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:26:59,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543801626] [2021-10-04 19:26:59,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543801626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:26:59,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226582288] [2021-10-04 19:26:59,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:26:59,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:26:59,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:26:59,870 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:26:59,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-04 19:27:01,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:27:01,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:27:01,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-04 19:27:01,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:27:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-04 19:27:03,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226582288] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:27:03,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:27:03,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2021-10-04 19:27:03,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787122913] [2021-10-04 19:27:03,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-04 19:27:03,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:27:03,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-04 19:27:03,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-10-04 19:27:03,979 INFO L87 Difference]: Start difference. First operand 336 states and 982 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:27:04,904 INFO L93 Difference]: Finished difference Result 886 states and 2417 transitions. [2021-10-04 19:27:04,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-04 19:27:04,905 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-04 19:27:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:27:04,910 INFO L225 Difference]: With dead ends: 886 [2021-10-04 19:27:04,911 INFO L226 Difference]: Without dead ends: 771 [2021-10-04 19:27:04,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1258.0ms TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-10-04 19:27:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2021-10-04 19:27:04,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 337. [2021-10-04 19:27:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 3.267857142857143) internal successors, (1098), 336 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:04,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 1098 transitions. [2021-10-04 19:27:04,924 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 1098 transitions. Word has length 37 [2021-10-04 19:27:04,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:27:04,925 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 1098 transitions. [2021-10-04 19:27:04,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:04,925 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 1098 transitions. [2021-10-04 19:27:04,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-04 19:27:04,927 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:27:04,927 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:27:04,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-04 19:27:05,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-04 19:27:05,141 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:27:05,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:27:05,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1796765659, now seen corresponding path program 23 times [2021-10-04 19:27:05,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:27:05,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643600681] [2021-10-04 19:27:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:27:05,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:27:05,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:27:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-04 19:27:05,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:27:05,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643600681] [2021-10-04 19:27:05,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643600681] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:27:05,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516578598] [2021-10-04 19:27:05,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-04 19:27:05,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:27:05,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:27:05,640 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:27:05,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-04 19:27:07,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-04 19:27:07,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:27:07,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-04 19:27:07,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:27:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-04 19:27:10,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516578598] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:27:10,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:27:10,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2021-10-04 19:27:10,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964021370] [2021-10-04 19:27:10,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-04 19:27:10,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:27:10,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-04 19:27:10,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2021-10-04 19:27:10,730 INFO L87 Difference]: Start difference. First operand 337 states and 1098 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:11,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:27:11,834 INFO L93 Difference]: Finished difference Result 609 states and 1886 transitions. [2021-10-04 19:27:11,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-04 19:27:11,835 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-10-04 19:27:11,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:27:11,839 INFO L225 Difference]: With dead ends: 609 [2021-10-04 19:27:11,839 INFO L226 Difference]: Without dead ends: 573 [2021-10-04 19:27:11,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1497.1ms TimeCoverageRelationStatistics Valid=163, Invalid=1027, Unknown=0, NotChecked=0, Total=1190 [2021-10-04 19:27:11,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-10-04 19:27:11,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 367. [2021-10-04 19:27:11,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 3.390710382513661) internal successors, (1241), 366 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1241 transitions. [2021-10-04 19:27:11,853 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1241 transitions. Word has length 38 [2021-10-04 19:27:11,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:27:11,854 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1241 transitions. [2021-10-04 19:27:11,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:11,854 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1241 transitions. [2021-10-04 19:27:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-04 19:27:11,855 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:27:11,856 INFO L512 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:27:11,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-04 19:27:12,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:27:12,070 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:27:12,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:27:12,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1896198902, now seen corresponding path program 24 times [2021-10-04 19:27:12,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:27:12,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377670425] [2021-10-04 19:27:12,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:27:12,072 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:27:12,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:27:12,630 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-04 19:27:12,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:27:12,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377670425] [2021-10-04 19:27:12,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377670425] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:27:12,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327196822] [2021-10-04 19:27:12,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-04 19:27:12,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:27:12,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:27:12,636 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:27:12,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-04 19:27:14,855 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-10-04 19:27:14,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:27:14,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-04 19:27:14,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:27:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:27:18,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327196822] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:27:18,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:27:18,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 35 [2021-10-04 19:27:18,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026259424] [2021-10-04 19:27:18,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-04 19:27:18,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:27:18,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-04 19:27:18,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2021-10-04 19:27:18,951 INFO L87 Difference]: Start difference. First operand 367 states and 1241 transitions. Second operand has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:27:21,149 INFO L93 Difference]: Finished difference Result 424 states and 1193 transitions. [2021-10-04 19:27:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-04 19:27:21,150 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-10-04 19:27:21,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:27:21,152 INFO L225 Difference]: With dead ends: 424 [2021-10-04 19:27:21,152 INFO L226 Difference]: Without dead ends: 342 [2021-10-04 19:27:21,153 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 3309.2ms TimeCoverageRelationStatistics Valid=301, Invalid=3239, Unknown=0, NotChecked=0, Total=3540 [2021-10-04 19:27:21,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-10-04 19:27:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 322. [2021-10-04 19:27:21,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.2118380062305296) internal successors, (1031), 321 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1031 transitions. [2021-10-04 19:27:21,159 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1031 transitions. Word has length 39 [2021-10-04 19:27:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:27:21,159 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1031 transitions. [2021-10-04 19:27:21,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:21,160 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1031 transitions. [2021-10-04 19:27:21,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-04 19:27:21,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:27:21,160 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:27:21,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-10-04 19:27:21,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-04 19:27:21,366 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:27:21,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:27:21,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1552779580, now seen corresponding path program 25 times [2021-10-04 19:27:21,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:27:21,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16396476] [2021-10-04 19:27:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:27:21,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:27:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:27:23,540 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-04 19:27:23,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:27:23,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16396476] [2021-10-04 19:27:23,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16396476] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:27:23,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797851156] [2021-10-04 19:27:23,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-04 19:27:23,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:27:23,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:27:23,543 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:27:23,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-04 19:27:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:27:25,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-04 19:27:25,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:27:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-04 19:27:30,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797851156] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:27:30,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:27:30,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 46 [2021-10-04 19:27:30,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847584198] [2021-10-04 19:27:30,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-04 19:27:30,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:27:30,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-04 19:27:30,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2131, Unknown=0, NotChecked=0, Total=2256 [2021-10-04 19:27:30,770 INFO L87 Difference]: Start difference. First operand 322 states and 1031 transitions. Second operand has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:40,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:27:40,198 INFO L93 Difference]: Finished difference Result 838 states and 2050 transitions. [2021-10-04 19:27:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-04 19:27:40,199 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-04 19:27:40,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:27:40,201 INFO L225 Difference]: With dead ends: 838 [2021-10-04 19:27:40,201 INFO L226 Difference]: Without dead ends: 378 [2021-10-04 19:27:40,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 10226.2ms TimeCoverageRelationStatistics Valid=641, Invalid=9061, Unknown=0, NotChecked=0, Total=9702 [2021-10-04 19:27:40,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-10-04 19:27:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 317. [2021-10-04 19:27:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 3.2373417721518987) internal successors, (1023), 316 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 1023 transitions. [2021-10-04 19:27:40,210 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 1023 transitions. Word has length 41 [2021-10-04 19:27:40,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:27:40,210 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 1023 transitions. [2021-10-04 19:27:40,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:40,211 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 1023 transitions. [2021-10-04 19:27:40,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-04 19:27:40,213 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:27:40,213 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:27:40,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-04 19:27:40,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:27:40,414 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:27:40,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:27:40,416 INFO L82 PathProgramCache]: Analyzing trace with hash -718675174, now seen corresponding path program 26 times [2021-10-04 19:27:40,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:27:40,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846879327] [2021-10-04 19:27:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:27:40,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:27:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:27:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 23 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-04 19:27:40,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:27:40,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846879327] [2021-10-04 19:27:40,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846879327] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:27:40,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165906663] [2021-10-04 19:27:40,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-04 19:27:40,669 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:27:40,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:27:40,676 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:27:40,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-04 19:27:43,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-04 19:27:43,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:27:43,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-04 19:27:43,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:27:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-10-04 19:27:44,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165906663] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:27:44,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:27:44,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-04 19:27:44,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345053148] [2021-10-04 19:27:44,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-04 19:27:44,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:27:44,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-04 19:27:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-10-04 19:27:44,652 INFO L87 Difference]: Start difference. First operand 317 states and 1023 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:27:45,211 INFO L93 Difference]: Finished difference Result 400 states and 1151 transitions. [2021-10-04 19:27:45,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-04 19:27:45,211 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-10-04 19:27:45,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:27:45,213 INFO L225 Difference]: With dead ends: 400 [2021-10-04 19:27:45,213 INFO L226 Difference]: Without dead ends: 318 [2021-10-04 19:27:45,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 846.6ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-10-04 19:27:45,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-10-04 19:27:45,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2021-10-04 19:27:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 3.230283911671924) internal successors, (1024), 317 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 1024 transitions. [2021-10-04 19:27:45,220 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 1024 transitions. Word has length 41 [2021-10-04 19:27:45,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:27:45,220 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 1024 transitions. [2021-10-04 19:27:45,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:45,220 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 1024 transitions. [2021-10-04 19:27:45,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-04 19:27:45,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:27:45,222 INFO L512 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:27:45,269 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-04 19:27:45,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:27:45,438 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:27:45,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:27:45,439 INFO L82 PathProgramCache]: Analyzing trace with hash -108458621, now seen corresponding path program 27 times [2021-10-04 19:27:45,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:27:45,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688686329] [2021-10-04 19:27:45,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:27:45,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:27:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:27:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-04 19:27:46,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:27:46,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688686329] [2021-10-04 19:27:46,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688686329] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:27:46,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493449962] [2021-10-04 19:27:46,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-04 19:27:46,928 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:27:46,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:27:46,929 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:27:46,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-04 19:27:49,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-04 19:27:49,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:27:49,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-04 19:27:49,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:27:54,270 INFO L354 Elim1Store]: treesize reduction 312, result has 43.6 percent of original size [2021-10-04 19:27:54,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 217 treesize of output 318 [2021-10-04 19:27:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-04 19:27:54,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493449962] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:27:54,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:27:54,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 38 [2021-10-04 19:27:54,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042263680] [2021-10-04 19:27:54,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-04 19:27:54,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:27:54,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-04 19:27:54,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2021-10-04 19:27:54,362 INFO L87 Difference]: Start difference. First operand 318 states and 1024 transitions. Second operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:58,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:27:58,789 INFO L93 Difference]: Finished difference Result 467 states and 1296 transitions. [2021-10-04 19:27:58,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-04 19:27:58,790 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-04 19:27:58,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:27:58,791 INFO L225 Difference]: With dead ends: 467 [2021-10-04 19:27:58,791 INFO L226 Difference]: Without dead ends: 446 [2021-10-04 19:27:58,792 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 5232.4ms TimeCoverageRelationStatistics Valid=262, Invalid=3644, Unknown=0, NotChecked=0, Total=3906 [2021-10-04 19:27:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-10-04 19:27:58,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 421. [2021-10-04 19:27:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.8904761904761904) internal successors, (1214), 420 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1214 transitions. [2021-10-04 19:27:58,800 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1214 transitions. Word has length 42 [2021-10-04 19:27:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:27:58,800 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1214 transitions. [2021-10-04 19:27:58,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:27:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1214 transitions. [2021-10-04 19:27:58,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-04 19:27:58,802 INFO L504 BasicCegarLoop]: Found error trace [2021-10-04 19:27:58,802 INFO L512 BasicCegarLoop]: trace histogram [7, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-04 19:27:58,838 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-10-04 19:27:59,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-04 19:27:59,009 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-10-04 19:27:59,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-04 19:27:59,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1628385338, now seen corresponding path program 28 times [2021-10-04 19:27:59,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-04 19:27:59,010 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765487477] [2021-10-04 19:27:59,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-04 19:27:59,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-04 19:27:59,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-04 19:28:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-04 19:28:00,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-04 19:28:00,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765487477] [2021-10-04 19:28:00,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765487477] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:28:00,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329161659] [2021-10-04 19:28:00,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-04 19:28:00,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-04 19:28:00,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-04 19:28:00,879 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-04 19:28:00,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-04 19:28:03,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-04 19:28:03,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-04 19:28:03,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-04 19:28:03,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-04 19:28:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 1 proven. 57 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-04 19:28:07,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329161659] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-04 19:28:07,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-04 19:28:07,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 40 [2021-10-04 19:28:07,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065510344] [2021-10-04 19:28:07,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-04 19:28:07,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-04 19:28:07,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-04 19:28:07,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1604, Unknown=0, NotChecked=0, Total=1722 [2021-10-04 19:28:07,787 INFO L87 Difference]: Start difference. First operand 421 states and 1214 transitions. Second operand has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:28:13,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-04 19:28:13,639 INFO L93 Difference]: Finished difference Result 501 states and 925 transitions. [2021-10-04 19:28:13,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-04 19:28:13,640 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-10-04 19:28:13,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-04 19:28:13,640 INFO L225 Difference]: With dead ends: 501 [2021-10-04 19:28:13,640 INFO L226 Difference]: Without dead ends: 0 [2021-10-04 19:28:13,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 6827.3ms TimeCoverageRelationStatistics Valid=412, Invalid=5594, Unknown=0, NotChecked=0, Total=6006 [2021-10-04 19:28:13,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-04 19:28:13,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-04 19:28:13,642 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) [2021-10-04 19:28:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-04 19:28:13,642 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2021-10-04 19:28:13,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-04 19:28:13,642 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-04 19:28:13,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.7317073170731707) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-04 19:28:13,643 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-04 19:28:13,643 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-04 19:28:13,645 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-04 19:28:13,645 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-04 19:28:13,645 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-04 19:28:13,646 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATION [2021-10-04 19:28:13,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-04 19:28:13,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-10-04 19:28:13,852 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-04 19:28:13,852 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-04 19:28:13,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 07:28:13 BasicIcfg [2021-10-04 19:28:13,855 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-04 19:28:13,855 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-04 19:28:13,855 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-04 19:28:13,856 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-04 19:28:13,856 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 07:23:54" (3/4) ... [2021-10-04 19:28:13,859 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-04 19:28:13,866 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-04 19:28:13,866 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-04 19:28:13,867 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread3 [2021-10-04 19:28:13,873 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-04 19:28:13,874 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-04 19:28:13,874 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-04 19:28:13,952 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-04 19:28:13,952 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-04 19:28:13,953 INFO L168 Benchmark]: Toolchain (without parser) took 261613.92 ms. Allocated memory was 44.0 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 29.8 MB in the beginning and 461.5 MB in the end (delta: -431.6 MB). Peak memory consumption was 907.7 MB. Max. memory is 16.1 GB. [2021-10-04 19:28:13,954 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 44.0 MB. Free memory is still 27.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-04 19:28:13,954 INFO L168 Benchmark]: CACSL2BoogieTranslator took 406.65 ms. Allocated memory was 44.0 MB in the beginning and 58.7 MB in the end (delta: 14.7 MB). Free memory was 29.6 MB in the beginning and 42.3 MB in the end (delta: -12.7 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2021-10-04 19:28:13,955 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.06 ms. Allocated memory is still 58.7 MB. Free memory was 42.3 MB in the beginning and 39.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-04 19:28:13,955 INFO L168 Benchmark]: Boogie Preprocessor took 46.19 ms. Allocated memory is still 58.7 MB. Free memory was 39.6 MB in the beginning and 37.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-04 19:28:13,955 INFO L168 Benchmark]: RCFGBuilder took 1380.42 ms. Allocated memory is still 58.7 MB. Free memory was 37.5 MB in the beginning and 31.6 MB in the end (delta: 6.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-10-04 19:28:13,956 INFO L168 Benchmark]: TraceAbstraction took 259605.44 ms. Allocated memory was 58.7 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 30.9 MB in the beginning and 465.2 MB in the end (delta: -434.2 MB). Peak memory consumption was 890.9 MB. Max. memory is 16.1 GB. [2021-10-04 19:28:13,956 INFO L168 Benchmark]: Witness Printer took 97.10 ms. Allocated memory is still 1.4 GB. Free memory was 465.2 MB in the beginning and 461.5 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-04 19:28:13,964 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 44.0 MB. Free memory is still 27.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 406.65 ms. Allocated memory was 44.0 MB in the beginning and 58.7 MB in the end (delta: 14.7 MB). Free memory was 29.6 MB in the beginning and 42.3 MB in the end (delta: -12.7 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.06 ms. Allocated memory is still 58.7 MB. Free memory was 42.3 MB in the beginning and 39.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.19 ms. Allocated memory is still 58.7 MB. Free memory was 39.6 MB in the beginning and 37.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1380.42 ms. Allocated memory is still 58.7 MB. Free memory was 37.5 MB in the beginning and 31.6 MB in the end (delta: 6.0 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 259605.44 ms. Allocated memory was 58.7 MB in the beginning and 1.4 GB in the end (delta: 1.3 GB). Free memory was 30.9 MB in the beginning and 465.2 MB in the end (delta: -434.2 MB). Peak memory consumption was 890.9 MB. Max. memory is 16.1 GB. * Witness Printer took 97.10 ms. Allocated memory is still 1.4 GB. Free memory was 465.2 MB in the beginning and 461.5 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 9005.7ms, 207 PlacesBefore, 33 PlacesAfterwards, 221 TransitionsBefore, 29 TransitionsAfterwards, 2196 CoEnabledTransitionPairs, 7 FixpointIterations, 139 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 16 TrivialYvCompositions, 4 ConcurrentYvCompositions, 18 ChoiceCompositions, 224 TotalNumberOfCompositions, 2138 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1984, positive: 1958, positive conditional: 0, positive unconditional: 1958, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1328, positive: 1322, positive conditional: 0, positive unconditional: 1322, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1328, positive: 1322, positive conditional: 0, positive unconditional: 1322, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 6, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 32, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 32, negative conditional: 0, negative unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1984, positive: 636, positive conditional: 0, positive unconditional: 636, negative: 20, negative conditional: 0, negative unconditional: 20, unknown: 1328, unknown conditional: 0, unknown unconditional: 1328] , Statistics on independence cache: Total cache size (in pairs): 44, Positive cache size: 42, Positive conditional cache size: 0, Positive unconditional cache size: 42, 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: 132]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 232 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 259435.7ms, OverallIterations: 53, TraceHistogramMax: 7, EmptinessCheckTime: 84.6ms, AutomataDifference: 76389.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9075.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1507 SDtfs, 6137 SDslu, 18234 SDs, 0 SdLazy, 28170 SolverSat, 2075 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23697.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2652 GetRequests, 1034 SyntacticMatches, 0 SemanticMatches, 1618 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13752 ImplicationChecksByTransitivity, 87593.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=567occurred in iteration=39, InterpolantAutomatonStates: 1021, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 578.1ms AutomataMinimizationTime, 53 MinimizatonAttempts, 5484 StatesRemovedByMinimization, 45 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1158.7ms SsaConstructionTime, 11753.0ms SatisfiabilityAnalysisTime, 103647.2ms InterpolantComputationTime, 3122 NumberOfCodeBlocks, 3117 NumberOfCodeBlocksAsserted, 195 NumberOfCheckSat, 3021 ConstructedInterpolants, 90 QuantifiedInterpolants, 64671 SizeOfPredicates, 1288 NumberOfNonLiveVariables, 12931 ConjunctsInSsa, 1208 ConjunctsInUnsatCore, 101 InterpolantComputations, 5 PerfectInterpolantSequences, 935/2481 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! [2021-10-04 19:28:14,030 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...